ICS Triplex T9402 Digital Input Module 16 Channel 24V

Product Overview

The ICS Triplex T9402 is a 16‑channel isolated digital input module for the Trusted TMR system. It accepts 0–32 Vdc inputs at 6.5 mA per channel, making it suitable for field contact monitoring, switch status, and limit sensing in safety‑critical applications. The module delivers deterministic scan times configurable for simplex (0.924 ms), dual (1.676 ms), or triple (2.453 ms) redundancy configurations.

Core Advantages

Flexible Redundancy Configuration

Supports simplex, dual, or triple input configurations with predictable scan times. Choose the redundancy level that matches your safety integrity requirements—0.924 ms for simplex, 1.676 ms for dual, or 2.453 ms for triple.

Fully Isolated Channels

All 16 channels are galvanically isolated, protecting the backplane from field transients and ensuring reliable operation in noisy industrial environments.

Low Power Consumption

Draws only 4.0 W (260 mA at 24V), minimising heat generation and reducing chassis cooling requirements.

Specifications

Installation Tips

Redundancy Planning

Select simplex, dual, or triple configuration based on your SIL requirement and available slots. Triple configuration uses three T9402 modules for 2‑out‑of‑3 voting. Scan time scales linearly with redundancy level.

Input Wiring

Connect field devices (pushbuttons, limit switches, proximity sensors) to the isolated input terminals. Each channel accepts 0–32 Vdc at 6.5 mA. Use shielded cables for long field runs to minimise noise pickup.

Channel Isolation

Each input is independently isolated from the backplane and from other channels. This prevents ground loops and protects the system from field wiring faults.

Why Choose T9402?

Delivers 16 isolated digital inputs in a compact, low‑power package. The deterministic scan times allow precise timing for safety logic execution. Supports flexible redundancy configurations to match any SIL level. Certified for hazardous areas and compatible with all ICS Triplex Trusted chassis. Ideal for emergency shutdown, fire & gas, and burner management systems.

FAQs

Q1: What determines the scan time I should use?
A1: The scan time depends on your system's redundancy configuration. Simplex (0.924 ms) for single modules, dual (1.676 ms) for redundant pairs, and triple (2.453 ms) for full TMR with 2‑out‑of‑3 voting.

Q2: Can I mix input voltage levels on different channels?
A2: Yes. Each channel accepts any voltage from 0 to 32 Vdc independently, thanks to full channel‑to‑channel isolation.

Q3: What is the 6.5 mA input current used for?
A3: The 6.5 mA is the wetting current that flows through the field contact. It helps clean switch contacts and ensures reliable low‑resistance connections, especially for dry contact inputs.