Description
Product Description
The TRICONEX 3381 Pulse Input Module is a six-channel pulse measurement module designed for Trident safety and control systems. It monitors speed-sensor signals from rotating machinery, including turbines, compressors, and other critical equipment, and converts pulse transitions into frequency and rotational-speed data for the controller application.
The module supports magnetic, active, and open-collector sensors. Its channel-isolated input design, built-in diagnostics, and triple-modular-redundant (TMR) architecture support reliable speed monitoring in industrial applications. The 3381 is compatible with the Trident Model 2381 Pulse Input Baseplate. Verify the controller generation, baseplate configuration, sensor signal levels, and application settings before installation.
TRICONEX 3381
Product Parameters and Datasheet
Brand: TRICONEX
Model: 3381
Series: Trident I/O
Product Name: Pulse Input Module
Product Type: Six-Channel Pulse Input Module
Input Points: 6 channel-isolated inputs with commoned ground
Input Type: Differential
Supported Sensors: Magnetic, active, and open-collector sensors
Maximum Operating Voltage: ±33 VDC
Differential Input Sensitivity: 500 mV peak-to-peak at 2–32,000 Hz; 1 V peak-to-peak at 0.5–2 Hz
Single-Ended Input Sensitivity: 1 V peak-to-peak at 2–32,000 Hz; 2 V peak-to-peak at 0.5–2 Hz
Input Frequency Range: 0.5 Hz to 32 kHz
Speed Measurement Range: 0–32,000 RPM
Duty Cycle: 20%–80%, or 10 μs minimum pulse width
Configurable Gear Teeth: 1–255
Resolution: 24 bits
Absolute Error: ±0.01% from 2,000–32,000 Hz; ±0.1% from 0.5–2,000 Hz
Minimum Scan Update Rate: 20 ms
Maximum Logic Power Consumption: 3 W
Compatible Baseplate: TRICONEX 2381 Pulse Input Baseplate
Diagnostics: Channel diagnostics and precision-reference testing
Product Status: Legacy product; verify availability and condition
Dimensions: Verify against the applicable installation documentation
Weight: Verify for the supplied unit
Place of Manufacture: Verify from the product label
Country of Origin: Verify from the product label
Power Requirements: Installed-system logic supply; confirm requirements for the configured baseplate
Discontinued: Legacy model; confirm lifecycle status with the supplier
Compatibility Note: Confirm that the existing system is Trident-compatible and uses the 2381 baseplate. Check sensor type, pulse amplitude, frequency, gear-tooth settings, and wiring before commissioning.
Recommended TRICONEX Models
1. 3382S2 — Pulse input module variant for newer Triconex safety platforms; verify channel count and system generation.
2. 3381S2 — Updated pulse input module variant; verify controller and baseplate compatibility.
3. 2381 — Pulse input baseplate designed for the 3381 module.
4. 3101 — Trident main processor module for compatible legacy systems.
5. 3201 — Trident communication module for supported system interfaces.
6. 3301 — 32-point digital input module for compatible Trident systems.
7. 3351 — 32-point analog input module for compatible Trident systems.
8. 3361 — Combined analog and digital input module for supported Trident hardware.
9. 3401 — 16-point digital output module for compatible Trident systems.
10. 3451 — Solid-state relay output module for supported Trident configurations.
11. 3481 — Four-point analog output module for compatible Trident systems.
12. 3482 — Four-point analog output module with mixed output ranges.
13. 2301 — Digital input baseplate for compatible Trident hardware.
14. 2401 — Digital output baseplate for compatible Trident hardware.
15. 8312 — Triconex power supply module for applicable Tricon systems; verify platform compatibility.
The recommended models are related Triconex components and are not all direct substitutes. Confirm the exact system architecture and hardware revision before ordering replacement parts.
