Bently 3500-32M 149986-01 4‑Channel Relay Output Module (M‑series upgraded version)

Description

Hardware & Electrical Specifications

‑ Manufacturer: Bently Nevada (Baker Hughes) ‑ Compatible System: 3500‑05 full‑size / mini TSI machinery‑protection rack, matches M‑series monitor cards ‑ Functional Type: M‑series Up‑graded 4‑Channel Relay Module ‑ Channel quantity: 4 isolated SPDT (Form‑C) relay channels ‑ Relay Contact Rating:  AC: 2A @250 VAC, max 450 VA  DC: 2A @30 VDC; 0.75A @48 VDC; 0.2A @125 VDC  Minimum switched current:100 mA @12 VDC ‑ Typical power consumption: 5.8 W, powered by rack backplane busBaker Hugh… ‑ Front‑panel Indicators: OK LED, TX/RX LED, four channel alarm status LED ‑ Matching Parts: Main‑board 149986‑02 must pair with rear I/O board 125720‑02, sold separately ‑ Hot‑swap: Supports hot‑swap. During replacement, measurement channels keep running; corresponding relay output is temporarily invalid. ‑ PCB Coating: Conformal coated for G3 harsh industrial cabinet environment ‑ Safety Certification: SIL‑2, ATEX / IECEx, cNRTLus hazardous area approval option available

Environmental Specifications

‑ Operating Temperature:‑30 °C ~ +65 °CBaker Hugh… ‑ Storage Temperature:‑40 °C ~ +85 °C ‑ Relative Humidity:5%‑95 % non‑condensing ‑ Vibration & Shock: Complies with API‑670 power‑plant cabinet EMC standards

Mechanical Data

‑ Dimension(W×H×D):25.4 mm ×120.7 mm ×251.5 mm ‑ Weight: approx 0.40 kg

Core Functions

1. Configurable alarm‑drive logic: Each relay channel supports AND / OR voting logic; trigger sources can select Alert, Danger, module fault Not‑OK status from any monitor channel inside rack.
2. Relay mode configuration: Hardware toggle switch for Normally‑Energized / Normally‑De‑energized; software configurable latching or non‑latching output mode.
3. External interlock driving: Output dry‑contact signal for field alarm indicator, turbine / gas‑turbine protection trip interlock circuit.
4. Multi‑module expansion: Multiple 3500/32M modules can be installed within one rack to expand relay output quantity.
5. Self‑diagnosis: Monitors internal working status, reports fault events to rack system log.
6. Functional‑safety capability: Supports SIL‑2 safety‑related protection application with certified hardware set.

Installation, Replacement & Critical Warnings

1. Module supports hot‑swap; monitor measurement & protection logic keep running during hot‑swap, relay output will be temporarily disconnected.
2. Compatibility warning: ‑ Cannot directly replace old‑generation 125712‑01. Backplane definition and contact parameters differ. ‑ Must match rear I/O board 125720‑02, cannot use legacy 125720‑01. ‑ Verify rack firmware version before replacement; firmware mismatch may cause relay logic anomaly.
3. For TMR triple‑redundant protection system, multi‑relay voting configuration shall be implemented to realize fault‑tolerant protection.
4. After replacement, check OK and channel LED status; download rack configuration project, verify each relay action and voting‑logic function.

5. Common failure mode: Relay‑contact burnout under over‑current load; input‑circuit surge damage. Must operate within contact rating limits.