Rockwell Automation T8424 User Manual

SDS-8424

ed TMR 120 Vac Digital Input

Trusted

Industrial Control System

TrustedTM TMR 120V ac Digital Input Module-T8424

FRONT PANEL

T8424 Trust

DESCRIPTION

The Trusted Input module interfaces to 40 field input devices. The module has broad voltage thresholds defined to IEC61131-2 and is designed to be used with Field Termination Assembly T8823 which provides a current sourcing interface. Comprehensive diagnostic tests are performed on each input channel, including tests for stuck on and stuck off failures. Fault tolerance is achieved through Triple Modular Redundancy (TMR) within the same module for each of the 40 input channels.

TMR 120Vac Digital

The module provides on-board Sequence of Events (SOE) reporting with a resolution of 1ms. A change of state triggers an SOE entry.

Each triplicated section of the module, referred to as a slice, conditions and measures each channel independently. Each slice is opto-isolated up to 2500V dc. Each slice sends its data to a safety layer hardware voter that presents the information from all three slices to the Trusted fault is detected on a slice of the module, the Trusted Processor will flag the error, indicating the need to replace the module. The Trusted Processor will continue to use the information provided by the remaining two slices until a replacement module is available. Replacement modules can be located in a standby slot next to the module or in a designated SmartSlot with a temporary connection to the same Trusted Termination Assembly.

Modules may be placed in any I/O module slot in a Trusted Chassis or Expander chassis. Once the I/O module configuration is set, mechanical keying is available on all I/O modules to prevent inserting a module into an incorrect slot.

Configuration of the module is carried out using the Trusted running on an Engineering Workstation. Once configured and loaded into the Trusted replacement modules are on-line educated by the TMR Processor.

TMR Processor. When a

TMR

Processor

Toolset

Controller,

TMR

FEATURES

 40 TMR input channels per

module

 Comprehensive diagnostics

and self-test

 2500V dc Opto-Isolation

 On-board 1ms resolution

Sequence of Events reporting

 Hot replaceable

 Front panel status LEDs for

each channel

 Module fault and status

indicators

 IEC 61508, SIL 3 safety

applications

Issue 2 Jan 2006

SDS-8424

Trusted

Industrial Control System

TrustedTM TMR 120V ac Digital Input Module-T8424

FTA

Input Field

Device

VAC

Field Termination Unit (FTU)

FIU

A/D

CONVERTER

SLICE A

SLICE B

SLICE C

FRONT PANEL

SERIAL DISPLAY LATCHES

VOTED STATUS DISPLAY LEDs

FIELD LOGIC

CONTROL

HOUSEKEEPING

SLICE POWER

SUPPLY

ISOLATION BARRIER

FRONT PANEL VOTING LOGIC

HEALTH

INDICATORS

HIU

SLICE CONTROL A

TIME STAMP

SLICE B

SLICE C

BUS INTERFACE

HOUSEKEEPING

MODULE TEMP

SUPPLY DIAG

DSP REFERENCE

HIU POWERFIU POWER

REDUNDANT

SUPPLY

24V1 24V2

BLOCK DIAGRAM

ELECTRICAL SPECIFICATION

Number of Inputs Field Common Isolation

Sustained Working ±250V dc

Maximum Withstanding ±2.5kV dc

Input Voltage

Measurement Range 150V ac

Maximum Withstanding 250V ac RMS or dc

Channel Input Resistance Power Consumption Sample Update Interval (no filter) Self-Test Interval Sequence of Events

Event Resolution 1ms

Time-stamp Accuracy ±0.5ms

Thresholds

Turn-on Voltage 82V ±10%

Turn-off Voltage 26V ±10% Fusing Intrinsic Safety Circuit Type

40 Channels

25k: 15 to 18W 5ms

2 minutes

50mA on T8823 FTA External barrier Fault tolerant, fully triplicated

IMB A

IMB B

IMB C

MECHANICAL SPECIFICATION

Dimensions (HxWxD):

241mm x 30mm x 300mm (9.5ins x 1.2ins x 11.8ins)

Weight:

1.13kg (2.5lbs)

ENVIRONMENTAL

Operating Temperature:

-5°C to 60°C (23°F to 140°F)

Operating Humidity:

5 to 95%, noncondensing

Vibration:

10 to 57Hz ±0.075mm 57 to 150Hz 1.0g

Shock:

15g, ½ sine wave, 11ms

EMI (IEC 801):

ESD Air discharge to 15kV Contact discharge to 8kV

Radiated Fields 10V/m, 27MHz to 500MHz

Transients and Bursts 2kV, 2.5kHz for t=60 seconds

ICS Triplex

Technical data sheets are intended for information and guidance. The Company has a policy of continual product development and improvement. Specifications are subject to change without notice. For latest information, visit our Websi te:- www. icst ripl ex.co m