Triconex 3501T Digital Input Module 115 VAC/VDC

Product Overview

The Triconex 3501T is a high-reliability digital input module. It uses Triple Modular Redundancy (TMR) for safety-critical tasks. This module supports 115 VAC or VDC signals. It features 32 isolated, non-commoned points. Each point has opto-isolation for strong noise immunity. The 3501T ensures stable operation in harsh industrial environments. Its diagnostic LEDs show module and point status clearly. This module fits seamlessly into Triconex safety systems.

Application Scenarios

You can use the 3501T in process safety shutdown systems. It works well in fire and gas detection panels. Use it for emergency shutdown (ESD) systems in oil and gas. It also fits turbine and compressor control applications. The module handles high-voltage AC or DC field signals. Its TMR design suits SIL 3 rated applications. Use it where fail-safe operation is a top priority.

Technical Specifications

Voltage type is 115 VAC or VDC. Input points are 32, non-commoned and isolated. AC and DC range is 90 to 155 VAC or VDC. Frequency range is DC or 47 to 63 Hz. Maximum voltage is 155 VAC or VDC. Switching level OFF to ON is above 86 VAC or VDC. Switching level ON to OFF is below 28 VAC or VDC. Nominal turn-on current is 6 to 9 mA. Typical hysteresis is 32 VAC or VDC. Input delay OFF to ON is under 8 ms. Input delay ON to OFF is under 15 ms. Point isolation is 1500 VDC or 2500 VDC. Nominal input impedance is above 8.5 K ohms. Field power load per ON point is 1.5 watts. At max field voltage, load is 2.9 watts.

Installation & Maintenance Guide

Mount the 3501T in a Triconex chassis securely. Ensure all field wiring meets local codes. Use proper termination panels for connections. Check module status LEDs during power-up. The PASS light indicates normal operation. The FAULT light signals a module error. The ACTIVE light shows the module is working. Replace the module only after removing power. Perform periodic visual inspections for damage. Keep the module free of dust and moisture.

Packing List

One Triconex 3501T Digital Input Module. One installation and user manual. One warranty card. No additional cables or panels are included. Use recommended termination panels like 9561-810 or 9561-110. For fanned-out cables, order model 9101-010. For ERT loopback cables, use model 9141-010.