Description
3500/33 (149986-01) Bently Nevada 16-Channel Relay Module
1. Product Features
- It is a full-height relay output module for the Bently Nevada 3500 machinery protection system, providing 16 independent SPDT relay channels.
- Each relay channel supports independent programmable AND/OR alarm voting logic, which can be linked to Alert, Danger, Not-OK signals from all monitor modules in the rack.
- Channels are divided into four groups, configurable via onboard switches for Normally Energized or Normally De-energized operation to meet fail-safe protection requirements.
- Built-in arc suppressors and electrical isolation circuits: 1000 V RMS between channels, 150 V RMS between channels and backplane, resisting industrial electromagnetic interference.
- Front panel equipped with OK, TX/RX communication indicators and channel alarm LEDs for real-time status monitoring and fast fault diagnosis.
- Epoxy-sealed relay construction for stable long-term operation in power plant control cabinet environments.
- Standard plug-in design compatible with 3500 series rack backplane, easy installation, replacement and maintenance.
- Realizes interlock control, alarm annunciations and equipment trip output for rotating machinery protection systems.
149986-01
2. Product Parameters
| Item | Specification |
|---|---|
| Brand | Bently Nevada (Baker Hughes) |
| Model | 3500/33, Part No.: 149986-01 |
| Product Type | 16-Channel Relay Output Module |
| Relay Type | SPDT (Single-Pole Double-Throw) |
| Power Consumption | 5.8 W typical |
| Contact Rating (Resistive Load) | Max 250 VAC / 300 VDC; Max 6 A |
| Isolation | 1000 V RMS between channels; 150 V RMS channel-to-backplane |
| Operating Temperature | -30 ℃ ~ +65 ℃ |
| Storage Temperature | -40 ℃ ~ +85 ℃ |
| Relative Humidity | 5% ~ 95%, non-condensing |
| Installation Method | Full-height plug-in slot on 3500 rack |
| Dimension | 241 mm (H) × 24.4 mm (W) × 242 mm (D) |
| Country of Origin | United States |
| Approximate Gross Weight | 0.46 KG |
| Warranty | 12 months |
3. Product Operation Instructions
- Static Protection: Wear anti-static wristband before handling the module to prevent electrostatic damage to electronic components.
- Pre-installation Check: Ensure the 3500 rack power is fully cut off; inspect module housing, connectors and PCB for visible damage.
- Installation: Align the module connector with rack backplane slot, insert smoothly and fasten front panel locking screw.
- Switch Setting: Adjust onboard DIP switches to select Normally Energized / Normally De-energized mode for each relay group.
- Field Wiring: Connect external alarm/trip control cables to relay terminals following official wiring drawing.
- System Configuration: Power on the rack, use 3500 configuration software to set alarm logic, voting mode and trigger sources for each channel.
- Commissioning: Simulate vibration/displacement alarm signals to verify relay action and interlock function.
- Daily Operation: Monitor LED status; regularly check relay contact tightness and system alarm response.
- Maintenance & Replacement: Cut off rack power before disassembly. After replacement, re-download configuration and complete function loop test.
- Troubleshooting: Inspect backplane contact, communication status and logic configuration if relays fail to actuate.
4. Application Fields
- Thermal Power Plants: Steam turbine, generator, auxiliary fan TSI machinery protection system.
- Combined Cycle Power Plants: Gas turbine & steam turbine monitoring and safety interlock system.
- Oil & Gas Industry: Centrifugal compressor, turbo expander, pump rotating equipment protection.
- Metallurgy Industry: Rolling mill, main drive motor, circulating pump vibration monitoring system.
- Petrochemical Plants: Large rotating equipment condition monitoring and emergency trip control.
- Independent Power Plants, captive power stations and heavy industrial power facilities.
- Overhaul, spare parts replacement and upgrade of existing Bently Nevada 3500 TSI systems.
