TRICONEX 2301

Digital Input Module (24‑Channel, TMR)

Official Specification & User Manual (English)

1. General Description

2. Part Number & Type

• Model: 2301

• Type: Digital Input Module (DI), TMR

• Series: Trident (Triconex / Schneider Electric)

• Safety Level: SIL 3 (IEC 61508)

• Approvals: TÜV Rheinland, FM, CSA

3. Key Features

• 24 Isolated Digital Input Channels

  Accepts discrete voltage signals (contact/voltage sense).

• Triple Modular Redundancy (TMR)

  Each channel is triple‑sampled and hardware‑voted; single‑point fault does not affect operation.

• Wide Input Voltage Range

  −30 VDC to +30 VDC, compatible with 24 VDC field devices.

• High Noise Immunity & Debounce

  On‑board filtering; configurable debounce (0–500 ms).

• Hot‑Swappable

  Replace module online without system shutdown.

• Comprehensive Diagnostics

  Channel‑level fault detection, open/short circuit monitoring, and SOE (Sequence of Events) time stamping.

4. Technical Specifications

4.1 Input Channels

• Number: 24 channels, isolated per channel

• Signal Type: Discrete (dry contact or voltage)

• Voltage Range: −30 VDC to +30 VDC

• Input Current: Max 6 mA per channel

• Response Time: 50 ms (default; configurable)

4.2 Safety & Redundancy

• Architecture: Triple Modular Redundant (TMR), 2oo3 voting

• Safety Integrity Level: SIL 3

• Fault Coverage: > 99%

• System Availability: 99.999%

4.3 Environmental

• Operating Temperature: 0°C to +60°C

• Storage Temperature: −40°C to +85°C

• Humidity: 5%–95% non‑condensing

• Vibration: 5–200 Hz, 1g

• Protection Class: IP20 (module), IP67 (enclosure option)

4.4 Power

• Backplane Power: 5 VDC / 1.5 A (from Trident chassis)

• Field Power: External 24 VDC (user‑supplied)

4.5 Physical

• Dimensions: 5.25” × 4.50” × 1.25” (133 mm × 114 mm × 32 mm)

• Weight: 0.5 lb (0.23 kg)

• Mounting: Trident baseplate, 19” rack compatible

5. Functional Overview

• Signal Sensing

  Reads 24 discrete on/off signals from field switches, pushbuttons, limit switches, and transmitters.

• Triple Voting

  Three independent input circuits per channel; results are majority‑voted to eliminate faults.

• Diagnostics & Alarms

  Detects open circuit, short circuit, and out‑of‑range voltage; reports to system via TriStation.

• SOE Logging

  Time‑stamps state changes with ≤ 40 ms resolution for safety event analysis.

6. LED Indicators

• PWR (Green): Module power OK

• RUN (Green): Module active, communicating

• FAULT (Red): Channel or module fault

• CH 1–24 (Yellow): Channel ON state

7. Installation & Configuration

1. Insert 2301 into an empty Trident baseplate slot.

2. Connect field discrete signals to the 24‑channel terminal block.

3. Apply external 24 VDC field power (if required).

4. Use TriStation 1131 to:

   • Enable/disable channels

   • Set debounce time

   • Configure fault thresholds

5. Verify LED status: PWR + RUN green, no FAULT red.

8. Typical Applications

• Emergency Shutdown (ESD) systems

• Burner Management Systems (BMS)

• Safety interlock panels

• Fire & gas detection systems

• High‑integrity pressure protection (HIPPS)

9. Maintenance

• Hot‑swap faulty 2301 without shutdown.

• Inspect field wiring and terminals periodically.

• Review SOE and fault logs via TriStation.

• Update firmware as needed.

10. Ordering Information

• Model: 2301

• Description: Triconex Trident 24‑Channel TMR Digital Input Module

• Compatible with: Trident Chassis, 2101/3700A MP Modules, TriStation 1131