TRICONEX 2381 Pulse Input Module

The TRICONEX 2381 Pulse Input Module is the Model 2381 pulse input (PI) baseplate of the Triconex/Trident TMR safety system — the mounting baseplate for Tricon pulse input modules that provides backplane connectivity and field-wiring termination optimized for high-speed pulse-signal routing. Per the official Trident Planning and Installation Manual, it serves a 6-point PI module with dual field-power inputs (PS1/PS2), blown-fuse indication, shielding, and safety-resistor/configuration/sensor blocks.
Key Features

1. Pulse input (PI) baseplate for Triconex / Trident TMR safety systems (Model 2381)
2. Mounting baseplate for Tricon pulse input modules — backplane connectivity + field termination
3. Supports 6-point PI module configuration
4. Dual field-power inputs (PS1/PS2) with blown-fuse indicator
5. Sensor block, configuration block and safety-resistor block for field wiring
6. Differential and single-ended input signal modes supported
7. Made in USA

1. Model: 2381 (PI2381)
2. Part Number: 7400221-100
3. Product Type: Pulse input baseplate
4. System: Triconex / Trident TMR safety system (SIS)
5. Module Support: 6-point PI module
6. Field Power: Dual inputs PS1/PS2, +24 V class field supply
7. Signal Inputs: Differential / single-ended
8. Max Operating Voltage: ±33 V DC
9. Kit Contents: I/O baseplate, interconnect assembly, slot cover, terminal cover (3000719-100 / 2921 / 2900 / 2901)
10. Note: Unused points must be terminated
11. Origin: USA

1. Verify the baseplate part number (7400221-100) and kit contents against the Trident/Tricon system documentation before installation.
2. Install the baseplate in the chassis slot; secure it and connect the backplane/interconnect assembly.
3. Wire field connections per the manual — observe +24 V #1/#2, 24 V Return, shield and safety-resistor/config/sensor block wiring.
4. Terminate all unused points to avoid false inputs.
5. After installation, verify PI signal readings via the TMR diagnostics and perform a pulse-input loop test before returning the safety system to service.

1. What is the Model 2381? It is the pulse input (PI) baseplate of the Triconex/Trident TMR safety system — the mounting baseplate for Tricon pulse input modules, providing backplane connectivity and field-wiring termination.
2. What does the kit include? The baseplate kit comprises the I/O baseplate, interconnect assembly, slot cover and terminal cover (3000719-100 / 2921 / 2900 / 2901, per Triconex parts data).
3. What input modes does it support? Differential and single-ended pulse signals; differential inputs require 500 mV p-p (2 Hz–32 kHz) or 1 V p-p (0.5–2 Hz) per service data.
4. What is the field power arrangement? Dual field-power inputs PS1/PS2 (+24 V class) with a blown-fuse indicator.

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