ICS Triplex T8122 Trusted Processor Interface Adapter Configured for physical serial signal interfacing in the Trusted TMR system, the ICS...
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Configured for physical serial signal interfacing in the Trusted TMR system, the ICS Triplex T8122 (T8122 Processor Interface Adapter) provides electrical access to processor communication ports. It supports RS-422/RS-485 serial communication and IRIG-B time synchronization while maintaining specified electrical isolation between external connections and the processor interface.
Suffix Breakdown & Model Matrix
The supplied documentation identifies T8122 as a single fixed model. No suffix or ordering-code breakdown is specified, so no additional model variants are inferred.
Trusted TMR Processors, including T8110B and T8111
Power Supply
Directly powered from the Trusted TMR Processor
Power Dissipation
0.1 W
Serial Interfaces
3 x RS-422 / RS-485
Time Synchronization Interface
IRIG-B
Supported Protocols
Modbus RTU; Modbus Slave; optional Modbus Master
Electrical Isolation
50 V reinforced continuous; 250 V basic fault
Isolation Type Test
2436 VDC for 60 seconds
Operating Temperature
0 deg C to +60 deg C
Hot-Swappable
Yes, subject to system replacement procedures
Certifications / Application Rating
CE, UL, CSA; SIL 3 safety-rated application support
TMR Safety Interface and Galvanic Isolation
The T8122 operates as an interface component within the ICS Triplex Trusted TMR architecture. The associated Trusted processors use triple modular redundancy to maintain fault-tolerant control execution. The T8122 provides specified galvanic isolation between external serial interfaces and the processor-side circuitry.
The serial interface supports RS-422 and RS-485 electrical signaling for Modbus communications. In addition, the IRIG-B port provides a dedicated interface for time synchronization. Therefore, external communication wiring remains electrically separated according to the stated isolation ratings.
The isolation system specifies 50 V reinforced continuous isolation and 250 V basic fault isolation. A 2436 VDC withstand test for 60 seconds further defines the stated isolation qualification.
Frequently Asked Questions (FAQ)
Q: Which processors can interface with the T8122? A: The supplied data identifies the Trusted TMR T8110B and T8111 processors as compatible processor interfaces.
Q: What serial interfaces does the T8122 provide? A: The module provides three RS-422 / RS-485 serial ports for supported Modbus communications.
Q: Can the T8122 be replaced while the system remains powered? A: The supplied specification identifies the T8122 as hot-swappable. Replacement must follow the applicable Trusted system maintenance procedure.
Field Installation Guidelines
Install the T8122 only in the specified Trusted TMR system hardware arrangement.
Confirm processor compatibility before connecting communication wiring.
Route RS-422 / RS-485 communication cables separately from high-voltage and high-current power conductors.
Maintain appropriate cable shielding and grounding practices for the installed communication network.
Terminate RS-422 / RS-485 networks according to the applicable network topology and equipment documentation.
Keep external communication wiring physically controlled to reduce electromagnetic coupling into serial signal circuits.
Connect IRIG-B wiring according to the selected time-synchronization interface configuration.
Do not bypass or modify the specified electrical isolation barriers.
Verify connector seating and module engagement before returning the system to service.
For hot-swap replacement, follow the Trusted system maintenance procedure and verify the module status after installation.
