TRICONEX 2755

Analog Input Module (TMR, SIL3)

Official English Specification (consistent format: 2651/2652/2658/2700/2750)

1. General Description

2. Model Information

• Model: 2755

• Type: Analog Input Module (TMR)

• System Series: Triconex Tricon / Trident SIS

• Safety Level: SIL3 (IEC 61508)

• Certification: TÜV, FM, CSA

• Part Number: 2755‑010

• Status: Active / In production

3. Main Features

• Triple Modular Redundancy (TMR): 3 independent input circuits, 2oo3 voting

• 16‑Channel Analog Input: 4–20mA (default) / 0–10V configurable

• High Precision: 16‑bit resolution, ±0.1% full‑scale accuracy

• Full Channel Diagnostics: Open/short circuit, over‑range, under‑range detection

• Hot‑Swappable: Online replacement without system shutdown

• Galvanic Isolation: Channel‑to‑backplane 1500Vrms

• SOE Timestamps: 1ms resolution for process event logging

• Noise Rejection: EMI/RFI filtering, common‑mode rejection

4. Technical Parameters

4.1 Input Specifications

• Signal Type: 4–20mA (default), 0–10V (configurable)

• Number of Channels: 16

• Resolution: 16‑bit

• Accuracy: ±0.1% FS (25°C)

• Repeatability: ±0.05% FS

• Input Impedance: 250Ω (4–20mA); >1MΩ (0–10V)

• Isolation: 1500Vrms channel‑to‑backplane

• Response Time: ≤100ms per channel

4.2 Redundancy & Safety

• Architecture: TMR (3 independent channels)

• Voting: 2oo3 fault‑tolerant

• Diagnostic Coverage: >99%

• System Availability: 99.999%

4.3 Environmental

• Operating Temperature: 0°C to +60°C

• Storage Temperature: −40°C to +85°C

• Relative Humidity: 5%–95% non‑condensing

• Vibration: 5–200Hz, 1g

4.4 Power & Physical

• Backplane Power: 5VDC

• Power Consumption: ≤12W

• Dimensions: Standard Trident full‑size module

• Weight: ~1.2kg

5. Function Overview

• Acquires 16‑channel 4–20mA/0–10V analog signals from transmitters (pressure, temperature, level, flow)

• Three TMR channels sample independently; 2oo3 voting ensures valid data

• Diagnostics continuously monitor for faults and report to TriStation

• Supports SOE for time‑stamped process events

• Integrates with Trident CPU (e.g., 2750) for safety logic execution

6. LED Indicators

• PWR (Green): 5VDC backplane power OK

• RUN (Green): Module active, TMR sync normal

• FAULT (Red): Channel/module fault or voting mismatch

• CH (Yellow): Per‑channel status (active/fault)

7. Installation & Configuration

1. Insert 2755 into empty Trident baseplate slot

2. Connect 4–20mA/0–10V field transmitters to FTA terminal base

3. Use TriStation 1131 to set signal type, range, filtering, and SOE

4. Verify: PWR+RUN green; no FAULT red; CH LEDs reflect active channels

8. Typical Applications

• ESD: Pressure, temperature, level transmitter monitoring

• BMS: Flame temperature, fuel gas pressure analog inputs

• FGS: Gas concentration detector (4–20mA) monitoring

• Critical process: Reactor temperature, vessel pressure, flow safety loops

• Power plant: Steam turbine vibration, temperature, pressure safety inputs

9. Maintenance

• Hot‑swap faulty 2755 without downtime

• Inspect field wiring and FTA terminal connections

• Review fault logs and SOE via TriStation

• Compatible with Trident TMR CPU 2750

10. Compatibility

• Compatible Systems: Triconex Tricon, Trident SIS

• Configuration Software: TriStation 1131 (v4.0+)

• Matching Terminal Base: 16‑channel analog input FTA

• Model: 2755

• Description: 16‑Channel Analog Input Module (4–20mA/0–10V), TMR, SIL3