T8480C Triple Redundant Digital Input Module

T8480C – ICS Triplex TMR Triple Redundant Digital Input Module
This is a 32 channel digital input (DI) module from the TRUSTED TMR series of ICS Triplex (now part of Schneider Electric/Triconex brand), featuring triple module redundancy (TMR) architecture, specifically designed for safety critical industrial control systems.

core positioning
Part number T8480C
Manufacturer ICS Triplex (Triconex/Schneider Electric)
TRUSTED TMR (Triple Modular Redundant Fault Tolerant System)
Function type: 32 channel digital input (DI)
Safety level SIL 2/SIL 3 (compliant with IEC 61508)
Redundant TMR triple hardware voting, single point failure does not affect output

Key technical parameters
32 input channels (dry contacts/relays/switch values)
Input voltage range: 0-30 VDC (dry contact passive input)
Input current ≤ 2 A/channel
Response time<2 ms
Measurement accuracy ± 0.1%
Working power supply 24 VDC
Power consumption<5W
Communication interface Ethernet PROFIBUS、Modbus RTU/TCP
Front panel indicator LED status light (power/communication/fault/channel status)
hot-swapping ✅ Support online replacement without interrupting system operation
Working temperature -40 ℃~+85 ℃
Storage temperature -40 ℃~+125 ℃
Protection level IP20 (installed inside the cabinet)
Dimensions 569mm × 87mm × 54mm
Weight approximately 0.85 kg
Certification IEC 61508, CE, UL, CSA
TMR redundancy mechanism
Three T8480C modules simultaneously collect the same set of switch signals
↓
Hardware level 2-out-of-3 voting
↓
Any module fault → automatic elimination, output not affected
↓
The faulty module can be hot replaced online without shutting down the system
This is the core advantage of the TRUSTED TMR series: no data loss or shutdown due to single module failure, suitable for SIL 2/SIL 3 safety instrumented systems.

Typical application scenarios
Specific application scenarios
ESD emergency stop system collects safety switch, emergency stop button, and valve feedback signals
FAS fire alarm system smoke/temperature sensing switch input and linkage control
SIS safety instrumented system works in conjunction with T8111C/T810B processor to execute safety logic
Monitoring of switch values for petroleum, chemical, natural gas, and electricity in the process industry
Equipment status detection and start/stop signal collection for manufacturing production lines

Supporting system architecture
┌──────────────────────────────────────────────┐
T8100/T8300 rack
│ ┌───────┐ ┌───────┐ ┌───────┐ ┌───────┐ │
│ │T8110B │ │T8110B │ │T8110B │ │T8480C │← DI│
│ │ CPU │ │ CPU │ │ CPU │ │ ×3 │ │
│ └───────┘ └───────┘ └───────┘ └───────┘ │
│ ┌───────┐ ┌───────┐ ┌───────┐ │
│ │T8403 │ │T8451 │ │T8480 │ ← DO/AO/DI │
│ └───────┘ └───────┘ └───────┘ │
│↑ RS-485/Ethernet bus connection │
└──────────────────────────────────────────────┘

Function of supporting modules
T8111C/T810B Trusted Processor, System Controller
T8403 Digital Output (DO) Module
T8451 Analog Output (AO) Module
T8480 (without C) DI module of the same series, configuration may be different
Comparison of DI modules in the same series
Characteristics of Model Channel Number
T8480C 32 channel DI model, TMR redundancy, SIL 2/3
T8480 32 channel DI standard type, may not be TMR
T8481 16 channel DI half density
T8482 64 channel DI high-density FTA
T8483 32 channel DI (isolated type) electrical isolation between channels

Replacement precautions
Confirm the meaning of suffix C: T8480C and T8480 may have differences in firmware version or I/O configuration. Before replacing, be sure to check the original system configuration table
TMR pairing: TMR systems require modules of the same type to be used in groups of three and cannot be mixed with non TMR modules
Firmware matching: TRUSTED system module firmware is strongly bound to the processor (T8110B/T8111C) version and needs to be matched
Address setting: RS-485/Ethernet address is set through module DIP switch or configuration software, and needs to be reconfigured after replacement
Input type confirmation: Confirm whether the on-site signal is dry contact (passive) or active 24VDC. T8480C mainly supports dry contact input

For more models or procurement inquiries, please contact:

Contact Manager Luo
Phone+86 180 3018 3032
Email to: 3248602330@qq.com