Name: ICS Triplex T9803
Brand: ICS Triplex

Products / ICS Triplex / T9803

ICS Triplex T9803

Model: T9803

Brand ICS Triplex

Series T9803

Model T9803

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Product Details And Specifications

ICS Triplex T9800 Series Technical Notes

The Evolution of T9800 Series Architecture

The T9800 I/O series was introduced alongside the original Trusted® TMR Safety System in the early 1990s, developed by ICS Triplex (later acquired by Rockwell Automation in 2007, subsequently integrated into the Allen-Bradley safety portfolio). The architecture has remained backward-compatible across multiple chassis generations, a deliberate design decision that extended the operational life of early installations well into the 2020s.

Early T9800 modules used parallel backplane addressing and required manual DIP-switch configuration for channel assignment. Mid-generation revisions introduced EEPROM-based configuration storage and improved diagnostic reporting via the Trusted® Workstation software suite. Later variants added enhanced EMC shielding and extended temperature ratings for offshore and desert-environment deployments. The T9800 series is now classified as a mature/end-of-life product line. ICS Triplex and Rockwell Automation have formally transitioned new projects to the Trusted® T9100 Series and the Allen-Bradley GuardLogix platform. However, the installed base of T9800 systems remains substantial, and lifecycle extension support — including spare module supply, repair, and functional testing — remains commercially active through specialist distributors.

T9800 Series Full Catalog & Functionalities (SKU List)

Digital Input Modules

T9803: 24 VDC TMR digital input module, 16-channel, SIL 3 rated, field-side isolated
T9800: Base digital input module, 24 VDC, 8-channel TMR, early-generation chassis compatible
T9801: 24 VDC digital input, 16-channel, enhanced diagnostic version with per-channel fault reporting
T9802: 48 VDC digital input module, 16-channel TMR, for high-voltage field circuits
T9804: 120 VAC digital input module, 8-channel TMR, for legacy AC field wiring
T9805: 240 VAC digital input module, 8-channel TMR, high-voltage AC process interface

Digital Output Modules

T9820: 24 VDC TMR digital output module, 8-channel, solid-state relay output, SIL 3
T9821: 24 VDC digital output, 16-channel, high-current sourcing output for solenoid valve actuation
T9822: 120 VAC digital output module, 8-channel TMR, triac output for AC load switching
T9823: Relay output module, 8-channel TMR, dry-contact form-C relay, 5A rated

Analog Input Modules

T9840: 4–20 mA analog input module, 8-channel TMR, 12-bit resolution, HART-transparent
T9841: 4–20 mA / 1–5 VDC analog input, 8-channel, enhanced resolution variant with 16-bit ADC
T9842: RTD/thermocouple input module, 8-channel TMR, multi-sensor type configurable
T9843: Millivolt/thermocouple analog input, 8-channel, cold-junction compensated

Analog Output Modules

T9860: 4–20 mA analog output module, 4-channel TMR, 12-bit DAC, loop-powered
T9861: 4–20 mA analog output, 8-channel, high-drive variant for long cable runs

Communication & Power Modules

T9100: Trusted® TMR main processor/controller module, chassis-resident CPU
T9110: Trusted® communication interface module, Modbus RTU / Modbus TCP gateway
T9120: Trusted® power supply module, 24 VDC input, redundant chassis power

Quality Control for the T9800 Series Range

T9800 modules present specific test challenges due to their TMR backplane architecture and the proprietary Trusted® bus protocol. Standard bench testing is insufficient to validate TMR voting logic integrity. DriveKNMS applies a structured test protocol for all T9800 units:

Visual inspection: PCB condition, connector pin integrity, conformal coating assessment, capacitor health check
Power-on self-test: Module boot sequence verification against known-good firmware behavior
Channel-level functional test: Each I/O channel exercised at rated voltage/current using calibrated signal sources
TMR voting verification: Tri-redundant signal path continuity confirmed via backplane loopback test fixture
Isolation test: Field-side to logic-side isolation resistance measured at 500 VDC (minimum 100 MΩ)
Burn-in: 48-hour powered soak at elevated ambient temperature to screen early-life failures
Final calibration check: Analog modules verified against NIST-traceable reference standards

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