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ICS Triplex T8451 Trusted TMR 24 Vdc Digital Output Module

SKU T8451

Disponibile

12-month warranty
Free returns within 30 days

Manufacturer: ICS Triplex
Product No.: T8451
Origin Mexico
Product Type: Digital Output Module
Payment: T/T, Western Union
Weight: 1.3 kg
Dimensions: 31 mm (W) x 266 mm (H) x 303 mm (D)
Shipping port: Xiamen
Warranty: 12 months

Product Documentation

Technical Datasheet (PDF) Complete specifications and technical drawings.

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Product Description

Description

The ICS Triplex T8451 is a 40-channel Trusted TMR 24 V DC digital output module.

It controls up to 40 field devices in safety and critical control applications.

Triple Modular Redundant circuitry is applied across every output channel.

This architecture maintains output control while detecting and isolating internal faults.

The module continuously tests channel voltage, current, stuck-on conditions, and stuck-off conditions.

Automatic line monitoring detects open circuits, short circuits, and field load faults.

The T8451 also provides galvanic isolation, electronic overcurrent protection, and onboard Sequence of Events reporting.

Its 40 outputs are arranged into five isolated power groups, with eight channels in each group.

Features

40 Triple Modular Redundant digital output channels.
Comprehensive automatic diagnostics and self-testing.
Automatic line monitoring for open-circuit and short-circuit faults.
Voltage and current monitoring across each voted output channel.
Stuck-on and stuck-off output diagnostics.
2500 V impulse withstand opto-isolation and galvanic isolation barrier.
Electronic overcurrent protection for each channel.
No external output fuses required.
Onboard Sequence of Events reporting with 1 ms resolution.
Online hot replacement using Companion Slot or SmartSlot configurations.
Individual output LEDs for output status and field wiring faults.
Module status LEDs for Active, Standby, and Educated states.
Five isolated power groups with eight outputs per group.

Applications

Safety Instrumented Systems
Emergency Shutdown control loops
SIL 3 critical industrial control applications
Hazardous process isolation using intrinsic safety barriers

Technical Specifications

Parameter	Specification
Manufacturer	Rockwell Automation / ICS Triplex
Model	T8451
Module Type	Trusted TMR 24 V DC Digital Output Module
Number of Outputs	40
Number of Power Groups	5, with 8 channels per power group
Backplane Supply Voltage	20 V DC to 32 V DC
System Supply Power	27 W
Field Supply Voltage	18 V DC to 32 V DC
Maximum Field Supply Current	40 A, limited to 8 A per power group at TA = 50°C maximum; 30 A, limited to 6 A per power group at TA = 60°C maximum
Power Dissipation	128 W at TA = 50°C maximum; 96 W at TA = 60°C maximum
Module Location	T8100 or T8300 I/O module slot
Power Group Isolation	50 V reinforced, continuous; type tested at 1411 V DC for 60 seconds
Field Common and Channel Isolation	50 V reinforced, continuous; 250 V basic under fault conditions; type tested at 2436 V DC for 60 seconds
Output On-State Resistance	1.6 ohm
Maximum Continuous Current	2 A per channel
Minimum On-State Load Current	50 mA
Current Measurement Range	0 A to 2.7 A, ±5% / ±5 mA
Voltage Measurement Range	0 V DC to +30 V DC +2 V DC
Maximum Withstand Voltage	-1 V DC to +40 V DC
Channel-to-Channel Crosstalk	Less than 1%
Maximum Load Capacitance	3000 µF
Output Short-Circuit Protection	Electronic latching
Sequence of Events Resolution	1 ms
Timestamp Accuracy	+10 ms
Operating Temperature	0°C to +60°C
Storage Temperature	-25°C to +70°C
Relative Humidity	10% to 95%, non-condensing
Dimensions	266 × 31 × 303 mm
Dimensions in Inches	10.5 × 1.2 × 12.0 in
Weight	1.3 kg

Connections and Interfaces

The rear connector carries SmartSlot links, output channels, power-group supplies, and power-group returns.

Connector Pin	Function
C1	SmartSlot Link C
B1	SmartSlot Link B
A1	SmartSlot Link A
C3	Channel 5 (+)
B3	Power Group 1 (+)
A3	Channel 1 (+)
C4	Channel 6 (+)
B4	Power Group 1 (+)
A4	Channel 2 (+)
C5	Power Group 1 Return
B5	Power Group 1 (+)
A5	Power Group 1 Return
C6	Channel 7 (+)
B6	Power Group 1 (+)
A6	Channel 3 (+)
C7	Channel 8 (+)
B7	Power Group 1 (+)
A7	Channel 4 (+)
C9	Channel 13 (+)
B9	Power Group 2 (+)
A9	Channel 9 (+)
C10	Channel 14 (+)
B10	Power Group 2 (+)
A10	Channel 10 (+)
C11	Power Group 2 Return
B11	Power Group 2 (+)
A11	Power Group 2 Return
C12	Channel 15 (+)
B12	Power Group 2 (+)
A12	Channel 11 (+)
C13	Channel 16 (+)
B13	Power Group 2 (+)
A13	Channel 12 (+)
C15	Channel 21 (+)
B15	Power Group 3 (+)
A15	Channel 17 (+)
C16	Channel 22 (+)
B16	Power Group 3 (+)
A16	Channel 18 (+)
C17	Power Group 3 Return
B17	Power Group 3 (+)
A17	Power Group 3 Return
C18	Channel 23 (+)
B18	Power Group 3 (+)
A18	Channel 19 (+)
C19	Channel 24 (+)
B19	Power Group 3 (+)
A19	Channel 20 (+)
C21	Channel 29 (+)
B21	Power Group 4 (+)
A21	Channel 25 (+)
C22	Channel 30 (+)
B22	Power Group 4 (+)
A22	Channel 26 (+)
C23	Power Group 4 Return
B23	Power Group 4 (+)
A23	Power Group 4 Return
C24	Channel 31 (+)
B24	Power Group 4 (+)
A24	Channel 27 (+)
C25	Channel 32 (+)
B25	Power Group 4 (+)
A25	Channel 28 (+)
C27	Channel 37 (+)
B27	Power Group 5 (+)
A27	Channel 33 (+)
C28	Channel 38 (+)
B28	Power Group 5 (+)
A28	Channel 34 (+)
C29	Power Group 5 Return
B29	Power Group 5 (+)
A29	Power Group 5 Return
C30	Channel 39 (+)
B30	Power Group 5 (+)
A30	Channel 35 (+)
C31	Channel 40 (+)
B31	Power Group 5 (+)
A31	Channel 36 (+)

Installation Guidelines

Static Handling Precautions

Observe standard electrostatic discharge precautions before handling the module.
Do not touch exposed connector pins.
Do not remove or open the module housing.

Pre-Installation Inspection

Inspect the module housing before installation.
Check rear connector pins for bending or physical damage.
Do not attempt to straighten damaged connector pins.

Module Keying

Remove polarization pins 1, 5, and 6 from the cable hood.
Confirm the cable hood matches the required module keying configuration.

Module Insertion

Release both ejector tabs using the approved release key.
Align the module carefully with its designated chassis slot.
Press the upper and lower fascia sections until the module is fully seated.
Close both ejector tabs until they lock into position.

Termination and Wiring

Command unused outputs to the off state within the application.
Connect each unused output through a 4K7, 0.5 W resistor to zero volts.
Fit dummy-load resistors to unused outputs to prevent NO-LOAD fault indications.

Compliance and Certifications

IEC 61508: TÜV certified for SIL 3 applications.

Shipping & Returns

Global Express Shipping

Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our technical warranty.

FAQ

What happens when an open or short circuit occurs on a channel?

The module detects the fault automatically via line monitoring, updates the line fault status for that specific channel, and triggers the configured front panel LED state without affecting other output channels.

Does this module require external fuses for output protection?

No external fuses are required. The module features automatic per-channel electronic overcurrent protection and an internal non-replaceable fusible link for overall protection.

Can this module be replaced while the system is online?

Yes, the module supports online hot-replacement using dedicated Companion Slot or SmartSlot configurations.

How are the output channels powered?

Outputs are powered in five isolated Power Groups of eight channels each.

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