abb Triguard SC300E 3BNP004720R101 TMR Safety Products

data. This mid-value is then used by

the control program.

Analogue Output Modules

• 4 channel – 12 bit resolution

4–20mA TMR

Each of the three Triguard SC300E

processors sends voted output voltage

data to the analogue output modules.

The commands are received via

the bus system by the three

micro-controllers on each module

Pulse Input Analogue Output

Module (PIANO)

• 8 channel, 4 pulse input, 4 analogue

output TMR

The PIANO module contains fully

triplicated circuits. Each pulse input

path receives input pulses, a value

equivalent to the number of teeth on

a gear wheel for example, and

accumulates this data to an accuracy

of +_0.01% over 20Hz to 20KHz.

Output values to 12 bit resolution can

provide voted and validated data to

field devices for control (see analogue

output module for output circuit

operation).

Communications Module

A four channel serial communications

module is always fitted to a Triguard

SC300E TMR system to allow

communications to the engineering

workstation and is installed in I/O slot

number 10 of the main chassis. All

four channels operate RS232423 up

to 19.2 kbits/sec and all four

communication ports are fully isolated.

The four channel communications

module is directly addressed by the

three Triguard SC300E processors and

contains a micro-computer that

controls the four programmable

multi-protocol ports. Data received

from the three processors is voted

2oo3 providing correct data for

onward transmission.

High speed network

connectivity feature (to be

released)

Triguard may be interfaced to standard

communications networks such as

Ethernet/TCP/IP using approved

gateway products.

DCS connectivity includes:

• Yokogawa Electric, Elsag-Bailey,

Fisher Rosemount, ABB, Honeywell

and Foxboro

Hot Repair Facility

A quick repair procedure, once any

fault is revealed, is important in the

total fault tolerant product strategy.

The hot repair facility achieves a quick

and easy repair by the user and this is

done bumplessly without interrupting

the normal operation of the system

and process.

The operating system, RTTS, routinely

executes a hot repair task, checking

and validating that all configuration

data is correct, eg. correct I/O

module, on-line/off-line hot repair

functions.

All I/O modules can be programmed

for a hot repair facility. A wrong or

faulty module in an allocated hot

repair I/O slot will not be accepted.

Hot repair slots are selected to be

next to the system I/O resident

module.

There are three ways to replace an

on-line I/O module:

• Module with no additional hot

repair slot – single slot hot repair

• Module has an unpopulated hot

repair partner slot – manual hot

repair

• Module with a populated hot repair

partner slot – hot repair

Field Termination Cards

The types of termination cards

available:

• 16 channel – digital input

• 32 channel – digital input

• 16 channel – digital output

• 16 channel – analogue input

• 4 channel – analogue output

• 16 channel – digital output with line

monitoring

• 4 channel – pulse input

DIN rail mounted termination cards

for field wiring can be supplied as an

easy to fit method to route field cables

to the Triguard SC300E system I/O

modules, and distribute field wetting

current to each I/O point.

A termination card has an associated

system cable fitted with DIN

connectors to provide the plug and

socket arrangement. Cable lengths can

be specified to suit the application.

Alternative cables with Elco

connectors or free wires at the field

end are available for third party

marshalling systems.

Power and fusing for the field circuits

are standard. Options are available to

suit all field configurations.

System cables from the Triguard

SC300E are also available with free

wire ends so that the system may

connect to a separate cable

marshalling and power/fusing system.

Cabinet Layouts

Optional cabinets to house the

Triguard SC300E TMR control system

are industry standard 19” rack

mounted configurations with a width

of 600mm and a depth of 800mm. The

layouts shown are based on a standard

2000mm high cabinets, and provide

front and rear access. Front access

only configurations are available.

System Structure

A major benefit of the Triguard

SC300E system is that it can be as

small as one chassis or as large as 15,