Bently 3500-33 149986-01 16‑Channel Relay Module Control Main Board

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: 16‑Channel Relay Control Main Board ‑ Channel quantity: 16 SPDT Form‑C relay outputs (realized by rear I/O board) ‑ Relay Contact Rating (resistive load):  AC: 3 A @250 VAC, max 1200 VA  DC: 3 A @30 VDC  Minimum switched current:100 mA @12 VDC ‑ Typical power consumption:5.8 W, powered by rack backplane bus ‑ Front‑panel Indicators: OK LED, 16‑channel individual status LED ‑ Matching Parts: 149986‑01 main board must pair with rear relay output board:  149992‑01: Standard 16‑CH relay  149992‑02: Failsafe 16‑CH relay  149992‑03: Low‑current 16‑CH relay  149992‑04: Low‑current failsafe 16‑CH relay ‑ Hot‑swap: NOT SUPPORT HOT‑SWAP. Power off rack slot before inserting / removing module. ‑ PCB Coating: Conformal coated for G3 harsh industrial cabinet environment ‑ Safety Certification: SIL‑2, ATEX / IECEx, cNRTLus hazardous‑area approval available

Environmental Specifications

‑ Operating Temperature:‑30 °C ~ +65 °C ‑ 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 0.42 kg

Core Functions

1. Multi‑channel configurable alarm‑drive logic: 16 independent relay channels, AND / OR voting logic configurable; trigger sources select Alert, Danger, Not‑OK fault status from any monitor channel in rack.
2. Group‑wise failsafe setting: 4 channels per group, hardware dip‑switch sets Normally‑Energized / Normally‑De‑energized mode.
3. External interlock signal output: Output dry‑contact signals for field alarm indication, DCS status input and auxiliary interlock circuits.
4. High‑density point expansion: Single module provides 16 relay points, saves rack slots for projects requiring large‑quantity alarm outputs.
5. Self‑diagnosis: Monitors internal hardware status, reports module‑level fault events to rack system log.

Installation, Replacement & Critical Warnings

1. Forbidden hot‑swap: Must power‑off target slot before plug‑in / pull‑out; hot‑swap will burn main‑board circuit immediately.
2. Compatibility warning: ‑ Cannot mix‑match rear I/O board types arbitrarily; 149986‑01 must match corresponding 149992‑xx rear relay board. ‑ Not for TMR triple‑redundant rack; TMR system uses 3500/34 module instead. ‑ Verify rack firmware version before installation; firmware mismatch causes relay logic disorder.
3. After replacement, check OK and channel LED status, download complete rack configuration project, verify every relay action and voting‑logic function.

4. Common failure mode: Backplane interface surge damage; rear relay‑board contact burnout under over‑current load. Main‑board fault does not equal relay‑board fault; distinguish main‑board and rear‑board during troubleshooting.