TRICONEX 2553

Digital Input Module (16‑Channel, TMR, 24 VDC, SIL 3)

Official Specification & User Manual (English)

1. General Description

2. Part Number & Type

• Model: 2553

• Type: Digital Input Module (DI), TMR

• Series: Trident / Tricon (Schneider Electric)

• Safety Level: SIL 3 (IEC 61508)

• Approvals: TÜV Rheinland, FM, CSA

3. Key Features

• 16 Isolated Digital Input Channels

  24 VDC nominal (20–36 VDC operating range).

• Triple Modular Redundancy (TMR)

  2oo3 voting; three independent input circuits per channel.

• High‑Speed Response

  ≤ 10 ms maximum response time.

• Per‑Channel Isolation

  1500 VAC channel‑to‑backplane isolation.

• Comprehensive Diagnostics

  Open circuit, short circuit, overvoltage, backplane fault.

• Hot‑Swappable

  Replace online without system shutdown.

• SIL 3 Fault Coverage

  99% diagnostic coverage.

4. Technical Specifications

4.1 Input Channels

• Number: 16 channels, isolated, single‑ended

• Signal Type: 24 VDC (dry contact / wet contact)

• Operating Voltage: 20–36 VDC

• Input Current: 4 mA @ 24 VDC per channel

• Response Time: ≤ 10 ms

• Isolation: 1500 VAC (channel‑to‑backplane)

4.2 Safety & Redundancy

• Architecture: 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

4.4 Power

• Backplane: 5 VDC / 1.2 A

• Power Consumption: ≤ 10 W

4.5 Physical

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

• Weight: ~0.38 kg

• Mounting: Trident baseplate, 19” rack

5. Functional Overview

• TMR Digital Sensing

  Three independent circuits read each contact state; 2oo3 voted result sent to TriBus.

• Signal Conditioning

  Debounce filtering (configurable), ESD/overvoltage protection.

• Diagnostics & Alarms

  Open/short circuit, overvoltage, backplane fault; reported via TriStation.

• SOE Logging

  Time‑stamps state changes (≤ 40 ms).

6. LED Indicators

• PWR (Green): Module power OK

• RUN (Green): Active, communicating

• FAULT (Red): Channel/module fault

• CH 1–16 (Yellow): Channel ON/OFF status

7. Installation & Configuration

1. Insert 2553 into an empty Trident baseplate slot.

2. Connect field contacts to the DI terminal base (PN 7400056‑380).

3. Use TriStation 1131 to:

   • Set debounce time (0–100 ms)

   • Configure normally open/normally closed

   • Enable diagnostics (open/short)

4. Verify: PWR + RUN green, no FAULT red.

8. Typical Applications

• ESD/BMS emergency stop switches

• Pressure/temperature/level limit switches

• Fire & gas detectors (contact output)

• Valve position feedback (limit switches)

• SIL 3 safety interlocks in oil & gas, power, chemical

9. Maintenance

• Hot‑swap faulty 2553 without shutdown.

• Inspect field wiring and terminal base connections.

• Review fault/SOE logs via TriStation.

10. Ordering Information

• Model: 2553

• Description: Triconex Trident 16‑Channel TMR Digital Input Module (24 VDC, SIL 3)

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