Bently Nevada 149986-01 16-Channel Relay Output Module

• Brand
  149986-01
• Model
  Bently Nevada
• Product Name
  16-Channel Relay Output Module
• Dimensions
  241 mm height × 24.4 mm width × 242 mm depth
• Weight
  0.80 kg
• Place of Origin
  United States
• HS Code
  85389091
• Operating Temperature
  -30 °C to +65 °C
• Storage Temperature
  -60 °C to +165 °C
• Power Supply
  24 VDC
• Warranty
  1 year
• Status
  new and original

Bently Nevada 149986-01 (3500/33 16-Channel Relay Control Module)

Features: Equipped with 16 fully independent programmable dry-contact relay output channels. Each channel provides configurable NO/NC dual contacts with electrical rating of 2 A at 240 VAC and 2 A at 30 VDC. The module supports flexible logic configuration including AND/OR logic and multi-channel voting logic for Alert, Danger and Module Not OK fault conditions. Channels can be grouped in four-channel sets and configured for either energized-normal or de-energized-normal operating mode to meet safety trip requirements. It provides 1000 V RMS channel-to-channel isolation and 150 V RMS channel-to-backplane isolation for strong anti-interference capability. Designed as a hot-swappable full-height rack module, it is powered entirely by the 3500 rack backplane with typical power consumption of 5.0 W. Integrated self-diagnostic functions continuously monitor relay circuit status and backplane power health to detect faults in real time. The module features wide temperature adaptability with an operating temperature range of -40 °C to +70 °C and storage temperature range of -40 °C to +85 °C. Fully compliant with API-670, CE, UL and cULus industrial safety standards. Front-panel LED indicators display real-time status of each relay channel, enabling intuitive local diagnosis. It serves as the critical interface to transmit 3500 system alarm and trip signals to external annunciators, shutdown systems and auxiliary control equipment.

Installation Guide for Bently Nevada 149986-01 (3500/33 16-Channel Relay Control Module)

Pre-Installation Preparation

Take mandatory ESD protective measures during module handling. Perform visual inspection to check for mechanical damage, bent pins and connector defects. Verify the structural integrity of the 3500 rack, correct protective earthing and cabinet shielding compliance. Confirm the target slot location inside the rack; this module can be installed in any vacant monitor slot behind the Rack Interface Module. Refer to on-site wiring schematics for relay external circuits, and ensure load voltage and current never exceed the maximum contact rating of 2 A @240 VAC and 2 A @30 VDC.

Rack Module Installation

Power down the entire 3500 rack for initial installation. Hot-swap operation is only allowed for module replacement purposes. Insert the full-height 3500/33 module into the predefined rack slot. Guarantee full mating between the module and backplane connector. Tighten front-panel mounting screws to fasten the module securely to the rack chassis. Mount the corresponding rear I/O termination module at the matching rear rack slot.

Field Relay Contact Wiring

Detach Euro-style terminal blocks from the rear termination unit. Strip wire insulation with a maximum length of 6 mm to prevent exposed bare conductors. Wire external alarm, annunciator and shutdown load circuits to NO, NC and ARM terminals strictly in accordance with project drawings. Comply with 1000 V RMS channel-to-channel isolation specifications. Avoid parallel routing of high-power load cables and low-level instrument signal cables. Fully re-seat terminal blocks onto the rear I/O base and lock the fastening screws. Apply adequate cable strain relief for all field connections.

Grounding & Noise Mitigation

Bond the 3500 rack chassis to the plant single-point protective ground. Maintain electrical isolation between relay load circuit ground and 3500 instrument ground so as to eliminate ground-loop interference. Physically separate inductive load cabling from transducer signal wiring. Install surge-suppression accessories for inductive loads including contactors and solenoids to restrain electric arc at relay contacts.

Power-on and Hardware Self-Test

Energize the 3500 rack system. Observe front-panel LED status indicators. Confirm the module remains in OK state with no active hardware fault alarms. Validate stable backplane power supply feeding the 3500/33 module, and ensure actual power consumption stays within the typical 5.0 W specification. Eliminate all diagnostic faults prior to performing software configuration.

System Software Configuration

Connect the configuration PC to the Rack Interface Module (RIM). Launch the 3500 rack configuration software and select the slot allocated for the 3500/33 module. Map alarm source signals including Alert, Danger and Not-OK status from relevant monitor modules. Configure relay channels in groups of four, and choose either energized-normal or de-energized-normal operating mode. Implement AND / OR logic as well as multi-channel voting logic for individual relay channels. Define latching or non-latching relay operation mode. Download the complete configuration to the rack and execute configuration validation with zero error reports.

Relay Functional Verification

Initiate the built-in software-controlled relay test function. Manually trigger each relay channel, verify physical contact switching and corresponding front-panel LED state change. Measure continuity of NO and NC contacts at external terminals to confirm loop integrity. Simulate system alarm conditions to validate relay output behaves consistent with programmed logic. Clear all alarms generated during testing once verification is finished.

Post-Installation Inspection & Documentation

Double-check tightness of all rear-side wiring terminals. Confirm no loose conductors, potential short-circuit hazards or insulation deterioration. Archive the final rack configuration file. Document slot number, relay logic assignments and contact load parameters within the installation report. Ensure fault-free module operation before commissioning the system for on-line machinery protection.

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