Technical Specifications​

Input channels: 32 discrete, grouped isolation.

Nominal input voltage: 115 VAC / 115 VDC.

OFF-state threshold: below 90 VAC/VDC.

Input current: approximately 4 mA per channel.

Isolation: 1500 V RMS channel-to-backplane.

Backplane supply: 5 VDC from Tricon rack.

Backplane power: less than 4 W.

Operating temperature: 0°C to 60°C.

Voting architecture: TMR, 2-out-of-3 per point group.

Diagnostics: open-circuit, short-circuit, threshold and channel-health reporting.

Functional Features​

High-density 115 VAC/VDC acquisition.

Optical isolation per channel group.

Triple redundant processing with automatic voting.

SOE-ready signal timing for safety audits.

Front-panel LEDs for run, sync, and fault status.

Material Composition and Structure​

Industrial PCB with conformal coating option, gold-finger backplane connector, molded housing, optical isolators, high-voltage resistors, and LED indicators. Designed for insertion in Tricon safety rack.

Working Principle​

Each input is conditioned, optically isolated, and fed to three independent processor legs. The system votes the acquired states and forwards validated discrete status to the safety logic solver. Abnormal threshold, open circuit, or leg disagreement generates diagnostics without losing validated output.

Installation Requirements​

Insert in the designated Tricon DI slot per rack keying. Use shielded field wiring with proper 115 V common reference. Verify backplane 5 VDC and slot configuration before online activation. Observe electrostatic-discharge handling.

Usage Notes​

Match field device dry-contact or powered-source type to 115 V rating. Avoid solid-state sensors with leakage current that can mimic closed contact. Do not mix isolated group commons incorrectly. Validate firmware and slot configuration after replacement.