Triconex 3501T Digital Input Module

The Triconex 3501T is a robust, 32-point, non-commoned, isolated digital input module, specifically designed for use with Triconex safety PLCs. Built to operate reliably in hazardous environments, this module ensures safe and efficient digital signal processing across a wide voltage range, from 90 to 155 VAC/VDC.

Key Features of the Triconex 3501T Digital Input Module

Wide Operating Voltage Range: Supports an input voltage of 90-155 VAC/VDC, ensuring compatibility across various industrial applications.
High Switching Levels: The 3501T offers a switching level of >86 VAC/VDC for off-to-on transitions and <28 VAC/VDC for on-to-off transitions, enabling reliable signal changes.
Low Turn-On Current: It operates with a nominal turn-on current of 6-9 mA, ensuring energy-efficient operation.
Fast Input Response: The module features a quick input delay of <8 ms for off-to-on and <15 ms for on-to-off, reducing system lag and improving responsiveness.
Maximum Point Isolation: Each input is isolated from the others and from the module ground, offering a maximum isolation of 1,500 VDC/2,500 VDC for added safety.
Diagnostic Features: Includes input status indicators for each point and module status indicators (PASS, FAULT, and ACTIVE) for easy monitoring.
Watchdog Timer: The built-in watchdog timer detects communication errors and facilitates automatic recovery, ensuring continuous operation in critical environments.
Nominal Input Impedance: With an input impedance of >8.5 kΩ, the 3501T supports stable performance in various field conditions.
Field Power Load: The module has a nominal field power load of 1.5 watts per on point, ensuring efficient energy consumption.

Technical Specifications

Feature	Specification
Model Number	3501T
Manufacturer	Triconex
Product Type	Digital Input Module
Input Type	32 isolated digital input points
Operating Voltage	90-155 VAC/VDC
Switching Level	>86 VAC/VDC for off to on, <28 VAC/VDC for on to off
Turn-On Current	6-9 mA
Hysteresis	32 VAC/VDC
Input Delay	<8 ms for off to on, <15 ms for on to off
Isolation	1,500 VDC/2,500 VDC
Input Impedance	>8.5 kΩ
Field Power Load	1.5 watts per on point
Status Indicators	PASS, FAULT, ACTIVE, input status indicators
Watchdog Timer	Detects and recovers from communication errors
Mounting	Standard for Triconex racks and control panels

Applications

The Triconex 3501T is ideally suited for use in hazardous environments, offering high isolation and rapid input response. Its diagnostic capabilities ensure uninterrupted system performance, making it a reliable choice for industrial automation in critical safety systems.

Safety Instrumented Systems (SIS): The 3501T ensures safe and precise input processing in Triconex safety PLCs.
Industrial Automation: Excellent for any process that requires isolated digital inputs and reliable communication in hazardous conditions.
Energy Management Systems: Its efficiency and diagnostic features make it well-suited for use in energy monitoring and control.