TRICONEX 3720

64Ch Single‑Ended 0–5VDC / ±5VDC TMR Analog Input Module

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1. General Description

2. Basic Information

• Model: 3720

• Type: 64Ch Single‑Ended Analog Input (TMR)

• Signal Ranges: 0–5VDC, ±5VDC; 4–20mA (shunt)

• System Compatibility: Tricon V9 / V10 / V11

• Safety Level: SIL3 (IEC 61508)

• Certifications: TUV, FM, CSA, ATEX/IECEx

• Architecture: TMR, 2oo3 voting

• Status: In production & supported

3. Key Features

• 64 single‑ended channels, high density

• 12‑bit / 14‑bit resolution (programmable)

• TMR fault tolerance, 2oo3 voting

• Fast update time: 10ms

• Channel‑to‑ground isolation: 1,500VDC

• Diagnostics: open/short, out‑of‑range, TMR mismatch

• Hot‑swappable; online replacement

• High noise immunity: –17dB @ 60Hz, –23dB @ 120Hz

• Overvoltage protection: 150VDC / 115VAC continuous

4. Technical Parameters

4.1 Analog Input

• Voltage: 0–5VDC, –5 to +5VDC

• Current: 4–20mA (external shunt)

• Channels: 64, single‑ended, isolated

• Resolution: 12 bits / 14 bits (programmable)

• Accuracy: <0.15% FSR (0°C to 60°C)

• Input impedance: >10MΩ (DC)

• Update rate: 10ms

4.2 Safety & Isolation

• Voting: 2‑out‑of‑3 (2oo3)

• Fault coverage: ≥99%

• Isolation: 1,500VDC (channel–ground)

• Channel‑to‑channel isolation: 420kΩ typical

• Diagnostics: open/short, over/under‑range, TMR mismatch

4.3 Environmental

• Operating temp: –40°C to +70°C

• Storage temp: –40°C to +85°C

• Humidity: 5%–95%, non‑condensing

• Vibration: 5–200Hz, 2G

4.4 Power & Mechanical

• Backplane: 5VDC

• Power consumption: ≤12W

• Dimensions: 178 × 127 × 63mm

• Weight: ~0.8kg

5. Function

6. LED Indicators

• PASS (Green): Normal operation

• FAULT (Red): Module/channel fault

• ACTIVE (Yellow): Channel active

• FIELD (Yellow): Field signal present

7. Installation & Configuration

1. Insert into Tricon I/O slots

2. Wire 0–5V/±5V or 4–20mA (shunt) to terminal base

3. Configure resolution/ranges via TriStation 1131

4. Verify LEDs and data quality

8. Typical Applications

• High‑density pressure/temp/level/flow monitoring (SIL3)

• ESD/SIS analog loops (large I/O count)

• BMS combustion parameters

• Oil/gas, chemical, power plant safety instrumentation

9. Maintenance

• Hot swap faulty modules online

• Calibrate annually or per site procedure

• Check wiring/shunts periodically

• Review fault/SOE logs

10. Compatibility

• Terminal base: 3720TB series

• Software: TriStation 1131

• Compatible processors: 3008, 3005 series