ICS Triplex T8403 Trusted TMR Digital Input Module
Condition:
Brand New & Original
Availability:
In Stock
Delivery Time:
5-7 Days
EXW Price:
$3500
Payment:
T/T, Full Payment Before Shipping
The T8403 is a 40-channel, 24 VDC digital input module in the ICS TRiplex Trusted TMR system. It is primarily used to acquire discrete signals from the field (such as pushbuttons, limit switches, relay contacts, and ESD signals) and upload the processed digital status to the Trusted TMR Processor.
Advantages
1. 40 channels of 24 VDC digital inputs
2. Each input features triple-module redundancy, utilizing a Σ-Δ (Sigma-Delta) measurement circuit for voltage sampling, with independently configurable alarm thresholds
3. Supports line monitoring to detect open circuits and short circuits in field wiring
4. On-board SOE event logging with 1 ms time resolution
5. Supports online hot-swapping
T8403 Operating Principle
The entire module can be divided into four functional sections: FTU (Field Termination Unit), FIU (Field Interface Unit), HIU (Host Interface Unit), and FPU (Front Panel Unit). The signal flow is as follows:
24V input from field devices
▼
FTU (surge protection, EMI/RFI filtering, and input protection)
▼
FIU (Three fully independent Slice A, B, and C inputs; measures and calculates input voltage; compares it with user-defined thresholds; and determines Open/Closed/Short/Open Circuit/Indeterminate)
▼
HIU (Performs 2003 voting on the three data channels; communicates with the TMR Processor; saves module data; and performs real-time self-diagnosis and line monitoring)
▼
IMB Backplane
▼
Trusted Processor
| Brief Introduction | |
| Manufacturer | ICS Triplex |
| Module/Order Number | T8403 |
| Description | Trusted TMR Digital Input Module |
| Country of origin | USA |
| Dimension & Net Weight | 26.6 x 3.1 x 30.3 cm, 1.149 kg |
| Packing Weight | 3kg |
FAQ
1. What does the T8403’s housekeeping function primarily monitor?
—It continuously monitors the 24V input voltage, internal power supply, current, board temperature, SmartSlot voltage, DAC reference voltage, and diagnostic error codes—a total of 51 diagnostic items—for fault localization.
2. What should I do if the T8403 module displays “Fatal,” and the LEDs show all three “Healthy” indicators as red, “Active” flashing red, “Standby” flashing red, and “Educated” flashing yellow?
—It is recommended to remove the module, reinsert it, and restart the system. If the problem persists, the entire module must be replaced.
3. How should I troubleshoot a T8403 failure?
—(1) Check the front-panel LED status
(2) Review the application variables: DI, STATE, AI, LINE_FLT, DISCREP, HKEEPING, and INFO
(3) Inspect the field wiring—check for open circuits, short circuits, loose connections, and faults in the Line Monitoring components
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