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GE 8044-CC-20 Carrier extension cable, 2.0m

On-line download

Users with safety responsibility can

download new parameters to a SafetyNet

Controller, from a Trusted Host, to a

Controller whose Key Switch is set to permit

new downloads and where the particular

SafetyNet Controller’s Password is known.

New parameter download is carried out as a

background task over a number of cycles to

ensure that the fault reaction and response

times are not compromised. Once download

is complete and the new parameters have

passed the checking and security tests, the

new parameters will be automatically

adopted. Where redundant SafetyNet

Controllers are used, the stand-by Controller

will also be automatically updated.

Note: on-line download should only be used

where there are adequate procedures for

approving the changes that have been made

and testing them prior to download.

Static Analysis Tool

Any safety-related application program must

be developed by suitably qualified personnel

and must be subject to careful scrutiny to

ensure safety, but the Workbench provides

an additional safety test. The Static Analysis

Tool checks for illegal constructs within the

safety program prior to download.

Differences Utility

Once a new SafetyNet application is

successfully compiled, it can be downloaded

to a SafetyNet Controller. On download, two

text reports are generated: a Download

Report and a Master Tag Xref. These can be

used for comparison with other downloads

using the Differences Utility.

Download backup

A time stamped backup of each safety

application is automatically created

following a successful download. Changes

between versions can be viewed and

backups can be used either as a start point

for developing new safety applications or to

restore an earlier version.

Change Control Log

The Workbench maintains a Change Control

Log that records – for example – when:

♦ IO Modules are added, deleted or moved

♦ Tags are added to, removed from, or

moved within an IO Module

♦ IO Configuration parameters are saved

♦ Controller IP addresses or node

numbers are entered or modified

♦ External node numbers are entered or

modified

♦ Serial communications parameters are

entered or modified

♦ A successful download is made

♦ A Strategy is removed

♦ The Controller password is changed

General

SafetyNet IO Modules interface to safety

system field wiring via Field Terminals.

The IO Modules and the Field Terminals

mount on Carriers that provide

mechanical support, but also connect the

internal communication bus and power

supply connections to the Modules.

The IO Modules are certified as suitable

for use in SIL 2 safety-related

applications.

Certification

The SafetyNet IO Modules are certified for

use in safety-related applications up to and

including SIL 2. The SafetyNet System

achieves this certification with a 1oo1D

architecture.

The SafetyNet IO Modules have been

designed specifically for safety-related

applications and are certified on the basis of

the excellence of their design. The

certification does not depend on “proven in

use” data.

Diagnostics

The IO Modules perform comprehensive

internal diagnostic tests as an essential part

of ensuring that the IO can carry out the

required safety function.

If the SafetyNet IO Module’s internal

diagnostics detect a fault that would prevent

the SafetyNet System from carrying out its

safety function, then it will initiate a controlled

shutdown. A controlled shutdown has two

objectives – firstly, to ensure that the IO

Module enters its failsafe mode; and

secondly, to record sufficient data to allow the

reason for the shutdown to be determined.

If a SafetyNet Module enters a controlled

shutdown, then all IO channels are de activated: input channels are not scanned;

and output channels are de-energised.

Bussed Field Power

The Bussed Field Power (BFP) connectors on

the rear of IO Module Carriers provide the

power connections for field instruments

wired to the IO Modules.

For the SafetyNet System, BFP must be 24V

dc and supplied by MTL’s 8914-PS-AC units.

These power supplies may be used in

redundant pairs, if required.

Live maintenance

SafetyNet IO Modules can be removed and

replaced in a Class 1, Division 2 or Zone 2

hazardous area – once the relevant Bussed

Field Power (BFP) connection has been

isolated using an appropriate hazardous

area switch (such as the MTL951). Removing

and replacing the Modules does not

interrupt the operation of the other parts of

the node.

If a Module is replaced by another Module

of identically the same type, then no

intervention is required for the System to

begin operating normally once the Bussed

Field Power is restored.

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GE 8021-CE-LH Carrier extender, left hand

Line fault monitoring

In addition to the comprehensive internal

diagnostics the SafetyNet IO Modules can

monitor field wiring for line faults.

Event logging

Data from SafetyNet IO Modules can be

time stamped and stored by the SafetyNet

Controller before being downloaded to the

MOST SOE Data Retrieval Client or a 3rd

party historian package. SafetyNet IO

Module data is time stamped with a

resolution of better than 200ms.

Failsafe Mode

IO Modules will enter Failsafe Mode from

the Running State either due to loss of

communications with the Controller or

because the module has received an

instruction from the Controller to enter the

Failsafe State. In this state:

♦ The Red Fault LED is lit

♦ The IO Module is flagged as unhealthy

to the Controller

♦ All Railbus Write requests are rejected,

except instructions to Reset or to exit the

Failsafe State

♦ Inputs and HART data are read

♦ Outputs are de-energised

♦ Background diagnostics continue and if

a failure is detected, the module will

enter Controlled Shutdown

Controlled Shutdown

A Controlled Shutdown is carried out if a fault

is detected in the Module. In this state it can

communicate the reason for shutdown.

LED’s

A number of LED’s are provided on each IO

Module to provide visual indication of the status

of the Module, its channels and its power supply.

Module ‘Fault’ LED (red)

On – Failsafe

Off – Normal operation

Flashing (equal:mark space ratio) – Cold

start in process, will flash until

communication is established with SafetyNet

Controller.

Blinking (On for a short period, then On

for a longer period – morse code ‘a’) – Fault

state after controlled shutdown

Module ‘Power’ LED (green)

On – Power OK

Off – BFP or Railbus Power Failure

Module ‘Channel’ LED’s

(yellow)

See Individual Module Specifications

Diagnostics

The SafetyNet Analogue Input Module carries

out a number of diagnostic checks to confirm

the accuracy of the measurement reported

and the correct operation of the module.

In addition to the primary measurement, a

second diagnostic measurement is made

using different internal circuitry. The two

values are then compared. The primary

measurement is reported as faulty if it differs

from the diagnostic measurement value by

more than 2%.

Further tests are carried out on internal

supply and references voltages.

If a particular channel fails a test, then that

channel is made inactive. If the failed test

indicates that the Module is not working

correctly, it will enter Controlled Shutdown.

Live maintenance

The field wiring connections to the SafetyNet

Analogue Input Module are classified as

non-incendive and can therefore be live

worked in a Class 1, Division 2 or Zone 2

hazardous area.

(Note the Bussed Field Power connection

must be isolated before the module is

removed or replaced).

Input sampling and filtering

Each input channel is sampled once every

25ms and is filtered by 1st order hardware

and software filters. The software filter can

be disabled or set to a number of different

values according to the filtering

requirements of each channel.

General

The SafetyNet Analog Input Module with

HART provides the interface to 8

channels of 4-20 mA input signals.

The SafetyNet Analogue Input Module is

certified for use in safety-related

applications up to SIL 2. In such

applications the module is used with the

8851-LC-MT SafetyNet Controller and

8811-IO-DC SafetyNet Discrete

Input/Output Module.

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GE 8080-FC-10 16-pin cable for 8618 (1m)

HART capability

The HART capabilities of the Analogue Input

Module allow acquisition of secondary

variables – which can be used by a standard

(but not SafetyNet) application program.

The Module also allows Emerson’s AMS

package to communicate with any HART

field device transparently, using HART passthrough. (The first release of SafetyNet will

not have full HART capability, contact MTL

for further information).

LED’s

For the operation of the Power and

Fault LED’s see IO Module Overview.

Module ‘Channel’ LED’s

(yellow)

On – Channel in range (4-20mA)

Off – Channel inactive

Flashing (equal:mark space ratio) – Any of

the following, with an active channel: line

fault (indicated by the input measurement

being outside the 4-20mA range), loss of

HART signal, Hi-Hi or Lo-Lo alarm.

Alarms, Deadband, Dead Zone

The Analogue Input Module has a number

of configurable parameters for managing

setting and clearing alarms and triggering

the reporting of a new input value.

Hi, Hi-Hi, Lo and Lo-Lo alarms can be

configured – together with a Deadband

through which the input must move before

the alarm is cleared. The relationship

between these parameters is shown in the

diagram below.

A Dead Zone can also be configured, which

is the value by which an input measurement

must change before it is reported as a new

value.

♦ 8 single ended 4-20mA input channels

♦ Certified for use in SIL 2 safety applications

♦ Non-incendive field circuits

♦ 2-, 3- or 4-wire transmitters

♦ HART pass-through, acquisition and status reporting*

♦ 24V dc Bussed Field Power required from 8914-PS-AC

MODULE SPECIFICATION

See also System Specification

INPUTS

Number of channels ………………………………….8, single-ended

Nominal signal range (span) ………………………………4 to 20mA

Full signal range …………………………………………..0.25 to 24mA

Line fault detection

Short circuit current ………………………………………………..> 23.5mA

Open circuit current ………………………………………………..< 0.5mA

Output voltage (@ 20mA)………………………………….10.2V (min.)

Output current ………………………………………………28mA (max.)

Accuracy (at 25oC) ……………………………………….± 0.1% of span

Temperature coefficient ……………………………………..38 ppm/C

Resolution ………………………………………………………………16 bits

Repeatability ………………………………………………0.05% of span

Data format ………………..16-bit unsigned (0-25mA = 0-65,535)

HART data format ………………………………IEEE754 floating point

Isolation

(any channel to Railbus) ……………………………………..250V ac RMS

(between channels) ……………………………………………………….none

CONFIGURABLE PARAMETERS

Alarms. ………………………………..high, high-high, low and low-low

Alarm deadband (hysteresis) ……………………..user defined value

Input filter time constant …………………………user defined value

Input dead zone ……………………………………..user defined value

Drive on fault state ………………….disabled /upscale /downscale

HART variable and status reporting ………….. enable /disable

RESPONSE TIME

Signal change to availability on Railbus

4– 20 mA mode ………………………………………………..25ms (max.)

HART mode………………………………………………..0.75s per channel

* The first release of SafetyNet will not have full HART capability,

contact MTL for further information.

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HAZARDOUS AREA SPECIFICATION

Protection Technique……………………………….EEx nA [nL] IIC T4

Location (FM and CSA) …………Class 1, Div.2, Grps A,B,C,D T4

(CSA with non-incendive field terminal, subject to conditions in CSA

certificate.)

FM non-incendive field wiring parameters (each channel)

……………………………………………………..Voc = 28.7V; Isc = 33mA

Gas groups A, B …………………………….Ca = 0.17µF; La = 11mH

Gas group C ………………………………….Ca = 0.51µF; La = 33mH

Gas group D ………………………………….Ca = 1.36µF; La = 88mH

POWER SUPPLIES

System Power Supply………………….50mA (typical), 70mA (max.)

Bussed Field Power Supply

……………………..350mA (2-wire TX max.), 110mA (4-wire TX max.)

MECHANICAL

Module Key Code …………………………………………………………A1

MODULE WIDTH ……………………………………………………..42mm

WEIGHT ……………………………………………………………………200g

For recommended and compatible Field Terminals, see

Field Terminal – Specification and Selection Guide.

General

The SafetyNet Discrete Input/Output

Module provides the interface to 8

channels that may be configured in any

combination of discrete inputs and

outputs.

The SafetyNet Discrete Input/Output

Module is certified for use in safety related applications up to SIL 2. In such

applications the module is used with the

8851-LC-MT SafetyNet Controller and

8810-HI-TX SafetyNet Analogue Input

Module with HART.

Combined inputs and

outputs

Each of the 8 channels of the SafetyNet

Discrete Input/Output Module may be

configured, on a channel-by-channel basis,

as either an input or an output.

When configured as an input, the channel is

suitable for use with dry contacts – with

power supplied from the Module.

When configured as an output, the channel

is capable of switching up to 2.0A

(maximum of 6.0A continuous per module).

Output channels are used with solenoids,

valves and alarms

Diagnostics

Comprehensive diagnostic tests are

performed on the module and each of its

channels, including tests for stuck ON and

stuck OFF output switches.

Live maintenance

The field wiring connections to the SafetyNet

Discrete I/O Module are classified as non sparking and can only be worked on in a

Class 1, Division 2 or Zone 2 hazardous

area once the Bussed Field Power

connection has been isolated.

Note: the Bussed Field Power connection

must also be isolated before removing or

replacing the module.

Input configuration

Input channels are used to interface to volt

free contacts. Line fault detection can be

turned OFF or can detect open circuits or

both open and short.

Input filtering

A change in the input state is recorded only

if the states observed at the start and end of

the filter time interval are the same. If they

are different the previous state is

maintained. (This reduces the chance of

noise being incorrectly interpreted as a

change of input value).

The filter time interval can be configured

between 0 and 8s, in 1ms intervals.

Input transition counting

A counter can record the number of filtered

transitions of a particular type. Depending

on the polarity setting, the counter will either

count transitions from 0 to 1, or from 1 to 0.

The counter “wraps around” from 65 535 to

zero without indication.

Transitions are counted even if the channel is

configured to “latching”.

Earth leakage detection

Where earth leakage fault detection is

required, a single channel of an 8811-IO DC module must be configured to monitor

earth leakage and wired to the appropriate

terminals of an 8751-CA-NS Controller

Carrier.

Input latching

Inputs can be configured to “latch” a

particular (filtered) input transition and

maintain the output in the latched state until

the latch is cleared. “Normal Polarity” will

latch a transition from 0 to 1 as 1, “Inverse

Polarity” will latch a transition 1 to 0 as 0.

The operation is described in figure 1.

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GE 8034-CC-12 Intrinsically Safe Carrier Extension

♦ 8 inputs – any combination of inputs and outputs

♦ Certified for use in SIL 2 safety applications

♦ Non-arcing inputs and outputs

♦ Output channels rated up to 2A continuous

♦ Inputs for dry contact switches

♦ 24Vdc Bussed Field Power required from 8914-PS-AC

MODULE SPECIFICATION

See also System Specification

Number of channels ……………………………………………………..8

(independently configured as inputs or outputs)

INPUTS

ON/OFF threshold current ………………………………0.9mA (typ.)

O/C Voltage………………….24V dc (typ.) – depends on BFP Supply

Wetting current ………………………………………………1.2mA (typ.)

Minimum pulse width detected………………………………….5ms

Max input frequency in pulse counting mode (no debounce) 30Hz

Isolation (any channel to Railbus)…………………………………250V ac

OUTPUTS

Maximum Output Current per Channel …………………………..2A

Maximum Output Current per Module

Continuous …………………………………………………………………………….6A

Non-continuous (<10 seconds)………………………………………………….8A

INPUT CONFIGURABLE PARAMETERS

Filter time interval ………………………………0 to 8s (in 1ms steps)

Earth Leakage Detection Channel ……………………….ON/OFF

Latch inputs ………………………………………………..enable /disable

Latch polarity ………………………………latch on high/latch on low

Pulse counting ………………..up transition/down transition/disable

Line fault detection………. none/open circuit/open & short circuit

OUTPUT CONFIGURABLE PARAMETERS

Output type ……………………………………….pulse/discrete/pattern

Pulse width……………………………………………………….1ms to 60s

Line fault detection*……….open line & short circuit detect /disable

* Normally de-energised channels only

RESISTANCE MEASUREMENT ACCURACY

For normally de-energised output open and short-circuit

detection.

With forward biased test current

……………………………… ±(3.4%+5.3Ω) for line resistance ≤ 220Ω

..greater of: ±7% or ±(3.1%+27Ω) for line resistance >220Ω, <1kΩ

With reverse biased test current

…………………………………………greater of: ±7% or ±(3.1%+430Ω)

RESPONSE TIME

Input Signal change to availability on Railbus …..5ms (max.)

Railbus command to output change …………………..1ms (max.)

HAZARDOUS AREA SPECIFICATION

Protection Technique…………………………………EEx nA nL IIC T4

Location (FM and CSA) …………Class 1, Div.2, Grps A,B,C,D T4

POWER SUPPLIES

System Power Supply ……………………50mA (typ.), 70mA (max.)

Bussed Field Power Supply

All channels configured as inputs …………………………..50mA (max)

Any channels configured as output……50mA + output load currents

MECHANICAL

Module key code …………………………………………………………B6

Module width …………………………………………………………42mm

Weight ……………………………………………………………………..210g

For recommended and compatible Field Terminals, see

Field Terminal – Specification and Selection Guide.

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GE 8085-FC-10 20 + 24 pin cables for 8619 (1m)

Power and communication

Carriers distribute “system” power to IO

Modules and provide the communications

route between Controllers and IO Modules.

(Controller power is supplied by direct

connections to the Controllers themselves).

IO Module Carriers provide connectors

through which field power can be supplied

(see “Bussed Field Power”). Note: field

power to Intrinsically Safe IO is managed

differently, see the relevant 2/1 data sheets.

Multi-pin connectors at the end of each

carrier allow further Carriers to be added–

and the “system” power supply and

“Railbus” connections to be made.

Earthing screens and shields

All I/O Module Carriers have their own

independent earthing/grounding strip

to terminate the screens/shields of field

wiring cables.

SafetyNet Controller Carrier

The SafetyNet Controller Carrier (8751-CA NS) is the dedicated Carrier for the

SafetyNet System. It can support simplex or

redundant SafetyNet Controllers and the

Power Supply Monitor (8410-NS-PS).

Serial communications

Two D-type connectors are provided on the

SafetyNet Controller Carrier for connecting

to serial devices. These link to Serial Port “1”

of Controller A and Controller B.

A second pair of D-type connectors is found

on the Controllers themselves, to provide

connections to Serial Port “2” where

redundant serial communication is required.

Further details of the serial port connections

are given in the data sheet for the SafetyNet

Controllers and Carriers.

Controller Carriers

Two Controller Carriers are available – the

standard Controller Carrier and the ELFD

Controller Carrier.

To comply with the earth leakage fault

detection (ELFD) requirements of Fire & Gas

application standards, the ELFD Controller

Carrier (8751-CA-NS) can be used. A single

channel of an 8811-IO-DC module must be

allocated to earth leakage detection to

implement this function.

SafetyNet applications that do not require

ELFD can use the standard Controller

Carrier (8750-CA-NS)

Change State buttons

Two change state buttons are mounted on

the SafetyNet Controller Carrier – one for

each Controller. The button is used to switch

a master to being the standby in a

redundant pair, to switch a standby offline

and to instruct an offline standby Controller

to synchronise itself with the Controller and

to enter standby.

Terminations for power fail

inputs

The 8913-PS-AC and 8914-PS-AC power

supplies each have an output that indicates

the health of the supply. These outputs can

be connected to the termination block on the

SafetyNet Controller Carrier and are used

by the Power Supply Monitor Module to

detect failures in any of up to 7 of these

external power supplies.

Module Carrier

SafetyNet Systems use the 8-module Carrier

with 64-slot addressing (8709-CA-08) for

SafetyNet and standard modules.

Up to 8 of these may be used together to

provide slots for up to 64 IO Modules.

The 4-module Carrier (8710-CA-04) can be

used where the application requires four IO

Modules or less. This will modify the

addressing system and users should should

contact MTL when considering this option.

Carrier Extenders and Cables

To allow for flexibility in cabinet layout,

Carrier Extenders are provided which –

together with the Extender Cables – are used

to connect Carriers mounted on different

sections of the cabinet backplane or DIN

rail. Carrier Extenders are used in left- and

right-hand pairs

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GE 8041-CC-35 Carrier extension cable, 0.35m

The ELFD Controller Carrier provides a mounting platform for up to

two SafetyNet Controllers (8851-LC-MT). It can also accommodate a

Power Supply Monitor module (8410-NS-PS) which can monitor the

health of up to two 8913-PS-AC, four 8914-PS-AC power supplies

and the 12V supply to Intrinsically Safe Modules (when these are

used). For each Controller there is a serial port connector and a

manually operated ““Change State” button. The Carrier also

provides terminals that are used when earth leakage fault detection

is required.

CARRIER SPECIFICATION

See also System Specification

CARRIER MOUNTING MODULES

SafetyNet Controller (x2) ………………………………..8851-LC-MT

Power Supply Monitor Module …………………………8410-NS-PS

ELECTRICAL CONNECTIONS

Railbus connector ………………………………………………..male out

Serial port connectors……………………9-pin, D-type (female) (x2)

Power Fail connections ……………………screw terminals (x7 pairs)

Ground connection …………………………….M4 screw terminal (x1)

BFP0V connection ………………………………M4 screw terminal (x1)

Earth leakage fault detection connections

…………………………………………………………screw terminals (1 pair)

System Power connections………………………………..6-Pin (male)

(Note: this does not provide power to the SafetyNet Controllers)

MECHANICAL

Dimensions …………………………..200 (w) x 253 (d) mm (footprint)

Height ……………………………………….28 mm (top of circuit board)

…………………………………………………………………..55 mm (overall)

Weight ……………………………………………………..1.43 kg (approx.)

Mounting methods ………………………………..flat panel (4 fixings)

USER CONTROLS

Two “ change state” buttons, one for each SafetyNet Controller, are

provided on the carrier. The state change depends upon the

controller state before the button is pressed. See table below for

effects.

Controller Carrier

ELFD Controller Carrier 8751-CA-NS

State Effect

Master Change to standby if current standby is healthy

Standby Change to offline state

Backup Re-synchronise and return to standby

EARTH LEAKAGE FAULT DETECTION

SYSTEM POWER SUPPLY CONNECTIONS

Pin # Function

1 0V

2 NC

3 Tx/Rx (+)

4 Tx/Rx (+)

5 Tx/Rx (-)

6 Tx/Rx (-)

7 NC

8 NC

9 0V

Terminal External Power

1 No connection

2 0V

3 +12V

4 +12V

5 0V

6 No connection

Two pairs of System Power supply connections (terminals 2/3 and

terminals 4/5) are provided for wiring a redundant pair of 8913-PSAC power supplies.

Note: The Controllers do not draw their power from these

connections, they are supplied with Controller Power via connections

on the Controllers themselves.

The GND terminal must always be connected to the main instrument

earth or the ‘star-point’ bus-bar. (Note: the 0V of the 8913-PS-AC

power supplies is GND).

The BFP0V terminal must always be connected to 0V of the 8914-PSAC power supplies.

Controller Carrier

When earth leakage fault detection is NOT required, a link should be

made – as shown below – between the BFP0V and GND connection

studs. Note: the BFP0V connection stud must still be connected to

Bussed Field Power 0V, marked “-” on the 8914-PS-AC power supply,

and the GND connection must still be connected to ground.

When earth leakage fault detection IS required, then the terminals of

connector CON12 must be wired to a channel of an 8810-IO-DC

module – as shown below – that has been configured for earth

leakage. Note: earth leakage fault detection can only operate when

BFP0V and all field wiring and field instruments are isolated from

ground (GND).

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GE 8086-FC-20 20 + 24 pin cables for 8619 (2m)

An 8410-NS-PS Node Services Power Supply Monitor Module must be

installed on the Controller Carrier to make use of this capability. If an8410-NS-PS is not being used, then it is not necessary to make anyconnections to the PSU Power Fail terminalsTerminal pairs 1, 2, 4 and 5These terminal pairs are used to monitor the AUX (or power fail)output from up to four 8914-PS-AC power supplies.The upper terminal of each pair is connected directly to the AUXterminal of the 8914-PS-AC that is to be monitored. It is notnecessary to connect the lower terminal – as this is internallyconnected to the BFP0V terminal on the Carrier.If any of the 8914-PS-AC supplies are acting as redundant pairs,then these should be connected to terminal pairs 1 and 2 and/ orterminal pairs 4 and 5.If a pair is unused, a shorting link must be placed between the upperand lower terminals, otherwise the Power Supply Monitor Module willcontinuously report a fault.Terminal pair 3The upper terminal of this pair should be connected to the 24V dcsupply of the 8914-PS-AC supply monitored by terminal pairs 1 and2. The lower should be connected to the 24Vdc supply of the 8914-PS-AC monitored by terminal pairs 4 and 5.If a single pair of 8914-PS-AC power supplies is being monitored,then it is only necessary to make single connection to appropriateterminal of pair 3.Terminal pair 6

This terminal pair is unconnected and should not be used.

Terminal pairs 7 and 8

These terminal pairs are used to monitor the AUX (or power fail)output from up to two 8913-PS-AC power supplies.The upper terminal of each pair is connected directly to the AUXterminal of the 8913-PS-AC that is to be monitored. It is not necessaryto connect the lower terminal – as this is internally connected to theGND terminal on the Carrier.If a pair is unused, a shorting link must be placed between the upperand lower terminals, otherwise the Power Supply Monitor Module willcontinuously report a fault.Terminal pair 9If a Railbus Isolator (8922-RB-IS) is not used in the node, this terminalpair must be fitted with a shorting link to prevent an alarm conditionbeing signalled to the Controller.If a Railbus Isolator is used, internal connections are made to monitorthe failure of any power supplies used to provide power for theIntrinsically Safe IO Modules.ELECTRICAL CONNECTIONSRailbus connectors ……………………………….female in, male outCable screens/shield connections…M4 screw terminals (x34)Bussed field power supply connectors………8-pin male (x2)The two 8-pin connectors provided at the top rear of the carrierconnect power supplies for ‘field power’. These supplies are routedthrough I/O modules that require power for their field circuits.MECHANICALDimensions ……………………………342 (w) x 170 (d) x 22 (h)mmWeight ……………………………………………………………………680gMounting methods…………………………….Flat panel or DIN railDIN-rail types……….‘Top hat’ 35 x 7.5mm rail or 35 x 15mm rail to EN 50022………………………………………………..G-section rail to EN 50035Note: For applications with up to 4 IO Modules, it is possible touse the 4-module Carrier (8710-CA-04). For further information,contact MTL.

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GE 8042-CC-85 Carrier extension cable, 0.85m

◆ ensures Railbus and power supply continuity

◆ pairs (left & right hand) link separate carrier runs

◆ sub-D connectors linked via multi-way cable

◆ multi-pin connector to carrier

◆ maximum of 3 extender pairs per node

◆ 32- and 64-slot address capable

CARRIER SPECIFICATION

See also System Specification

ELECTRICAL CONNECTIONS

Railbus carrier connector

8020-CE-RH …………………………………………………………female in

8021-CE-LH…………………………………………………………..male out

Extender cable connector ……………………Sub-D, 37-pin female

System Power cable connections* …………..screw terminal (x6)

System Power cable conductor size………………2.5mm2 (max.)

* The six terminals for the System Power connections must be made

in addition to connecting the Extender cable. The Terminals on the

left- and right- hand extenders indicate which connections need to be

made for System Power (HVCC + and HVCC -) and an internal

ground connection (SGND).

MECHANICAL

Dimensions (overall) ……………………42 (w) x 168 (d) x 37 (h)mm

Weight. ……………………………………………………………………135g

Mounting method …………………………….integral DIN-rail fixings

DIN rail types

………………….‘Top hat’, 35 x 7.5mm or 35 x 15mm to EN 50022

……………………………………………………….G-section, to EN 50035

PART NUMBERS

Carrier Extender, Right-hand 8020-CE-RH

Carrier Extender, Left-hand 8021-CE-LH

8-channel Field Terminals

SafetyNet IO Modules use standard MOST

8-channel Field Terminals. Depending on

the application, the Field Terminals may be

for general purpose, non-arcing or nonincendive field wiring, may incorporate

fused disconnects and may be for 2-, 3- or

4-wire transmitters.

Fused disconnect

The fused disconnect Field Terminals

incorporate a 2A fuse that can be partially

withdrawn from the Field Terminal to act as

a loop disconnect.

Tag strip

Each Field Terminal is supplied with an

integral tag strip, which is hinged to provide

access to the wiring terminals and the fuse

disconnects.

Field Terminal clicks

on to Carrier

The Field Terminal is easily removed from

the Carrier – it is held in place by a sprung

latch that can be released without the need

for tools. This simplifies connection of the

field wiring. The Field Terminal is secured in

place by the insertion of the IO Module.

Wiring to Field Terminals

SafetyNet IO Modules all use 8-channel

Field Terminals, to which wiring with a cross

section of up to 2.5mm2 can be connected.

Each termination point is clearly numbered

to simplify recognition of each terminal. The

two rows of terminals are offset to allow

access to the lower row when wiring is in

place.

March 31, 2025 BY star123423719@163.com

IN Uncategorized

Electric tricycle truck, agricultural tricycle, elderly vehicle, warehouse truck

Powerful performance: With a top speed of over 20 miles per hour and a standard range of 50 miles
per charge. The standard 18 tube controller,
upgraded powerful silent 1000W brushless differential motor, and dedicated 60V 45Ah lead-acid battery power supply reduce the weight of the
vehicle, making the driving range and load capacity stronger.

Practical: Newly designed integrated perforated cargo box, concave steel box, vehicle size: 114 * 39 * 63.5 inches, cargo box
size: 70.8 * 39 * 16 inches, vehicle weight: 353 pounds, rated load: 1100 pounds, front/rear brake type: front/rear brake:
drum brake, parking brake: manual brake, charging time: 6-8 hours- 8 hours

Our electric tricycle is equipped with sturdy tires that provide excellent grip on any terrain. The front wheels are lengthened
with hydraulic shock absorbers to reduce collisions and provide smooth driving. The front bumper is thickened, and the body
bumper is made of sturdy metal to ensure strength and service life, providing a solid foundation for your ride.

Excellent features: Luxurious LCD instrument panel, safe and reliable front LED headlights – providing excellent visibility
through directional signals, brake lights, and powerful headlights. Dual rearview mirrors ensure visibility.
The electric tricycle is also equipped with an anti-skid controller. When reversing downhill, the controller will maintain a constant slow reversal and rolling speed to ensure your personal safety.

[Easy to use] Adult electric tricycles can be used as electric tricycles for daily and short distance travel.
Electric motorcycles can be leisurely ridden on the streets or easily cross hills. You can also use it to load goods,
which can help you transport goods and provide higher efficiency for agriculture and transportation.

Safe and reliable configuration: The electric tricycle has a climbing gear, which is sturdy and strong when climbing

at low speeds, greatly increasing the load capacity to meet the needs of climbing and pulling heavy objects.
The three speeds can be easily adjusted through the variable speed control knob, and the display screen will
show the remaining power, range, and current speed, allowing you to quickly check the battery status and add color and happiness to your life.

Friendly reminder of logistics time: The arrival time of electric tricycles is about 45-60 days. If you don’t want
to wait, please forgive us. 1. Because our electric tricycle factory has undergone performance and safety testing;
The packaging must be sturdy to avoid damage during transportation. 3. Electric tricycles are transported by sea,
so the transportation time is slightly longer. If you have any questions, please feel free to contact us and we will provide you with the best quality service and after-sales protection.