TRICONEX 2658

Tricon II Terminator Interface Module (TMR, SIL 3)

Official English Specification Manual (consistent format with 2651/2652)

1. General Description

2. Model Information

• Model: 2658

• Type: Terminator Interface Module (Tricon II)

• System Series: Triconex Tricon / Trident

• Safety Level: SIL 3 (IEC 61508)

• Certification: TÜV, FM, CSA

• Part Number: 7400096‑200

• Status: Obsolete / Discontinued

3. Main Features

• Tricon II System Termination Interface

  Dedicated termination for Tricon II I/O and communication buses.

• 100 Ω RS‑485 Line Termination

  Built‑in termination resistors to optimize signal integrity.

• Triple Modular Redundancy (TMR) Compatible

  Supports 2oo3 voting architecture for safety‑critical links.

• 24 VDC Powered Interface

  Backplane or external 24 VDC supply.

• High Noise Immunity

  Reduces EMI/RFI interference on field communication lines.

• N+1 Redundancy Support

  Enhances system availability for continuous operation.

• Hot‑Swappable

  Online replacement without system shutdown.

4. Technical Parameters

4.1 Electrical

• Supply Voltage: 24 VDC (nominal)

• Input Current: 10 mA

• Termination Resistance: 100 Ω (RS‑485)

• Communication Standard: RS‑485 compatible

• Isolation: Galvanic isolation between field and backplane

4.2 Redundancy & Safety

• Architecture: TMR / N+1 redundancy

• Safety Integrity Level: SIL 3

• Fault Coverage: > 99% (diagnostics)

• System Availability: 99.999%

4.3 Environmental

• Operating Temperature: −40°C to +70°C

• Storage Temperature: −40°C to +85°C

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

• Vibration: 5–200 Hz, 1 g

4.4 Physical

• Dimensions: ~100 mm × 100 mm × 40 mm

• Weight: ~0.5 kg

• Mounting: Tricon / Trident baseplate, 19” rack

5. Function Overview

• Signal Termination

  Provides precise 100 Ω termination for RS‑485 communication lines, preventing signal reflection and noise.

• TMR Interface Routing

  Distributes and conditions signals between the three TMR channels.

• Fault Detection & Reporting

  Monitors line faults, open/short, and power supply anomalies; reports via TriStation.

• SOE Timing

  Supports time‑stamped event logging for communication and termination status changes.

6. LED Indicators

• PWR (Green): 24 VDC power OK

• RUN (Green): Module active, communicating

• FAULT (Red): Termination/communication fault

• TERM (Yellow): Termination active

7. Installation & Configuration

1. Insert 2658 into a Tricon II / Trident baseplate slot.

2. Connect RS‑485 field cables to the module’s termination ports.

3. Apply 24 VDC power (backplane or external).

4. Use TriStation 1131 to enable termination and set fault thresholds.

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

8. Typical Applications

• Tricon II SIS system communication bus termination

• RS‑485 field network termination in SIL 3 loops

• ESD/BMS system redundant communication links

• Oil & gas, petrochemical, power plant safety I/O termination

• Critical alarm and interlock signal conditioning

9. Maintenance

• Hot‑swap faulty 2658 without system shutdown.

• Inspect RS‑485 cables and termination connections.

• Review fault logs and SOE records via TriStation.

• Replacement: Contact Triconex for equivalent termination modules.

10. Compatibility & Ordering

• Compatible Systems: Tricon II, Trident SIS

• Configuration Software: TriStation 1131

• Matching Terminal Base: Tricon II dedicated termination base

• Model: 2658

• Description: Tricon II Terminator Interface Module (100 Ω RS‑485, 24 VDC, SIL 3)