Overview
Configured for discrete alarm relay output execution in the Bently Nevada 3300 Series monitoring system, the Bently Nevada 88149-01 (88149-01 Alarm Relay Outputs Assembly) provides physical relay contacts for external alarm and trip circuits. The assembly transfers monitor status into discrete electrical switching actions for connected annunciation, control, or shutdown circuits.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 88149-01 |
| Brand | Bently Nevada |
| Product Type | Alarm Relay Outputs Assembly |
| System Compatibility | Bently Nevada 3300 Series Monitoring Systems |
| Primary Function | Discrete relay contact outputs |
| Output Application | Alarm, trip, annunciation, control, and shutdown circuits |
Relay Output and Machinery Protection Interface
The 88149-01 provides the physical relay-output interface between 3300 Series monitoring logic and external circuits. Monitor conditions generate alarm or trip states, while the relay contacts transfer those states to connected field devices.
The assembly does not itself provide vibration sensing. Instead, it operates on discrete status information generated by compatible monitoring modules. Therefore, the connected circuit must match the relay contact configuration and the electrical requirements of the external control or annunciation system.
For machinery protection applications, relay wiring should remain physically separated from low-level vibration and transducer signal wiring. This arrangement limits electrical coupling between switching circuits and sensitive measurement paths.
Frequently Asked Questions
Q: What signal does the 88149-01 provide?
A: The supplied information identifies the assembly as a discrete relay-output interface for alarm and trip logic. It does not specify an analog measurement output.
Q: Can the 88149-01 operate as an independent vibration monitor?
A: No. The supplied data identifies it as an alarm relay outputs assembly within the Bently Nevada 3300 Series architecture. It does not identify the assembly as a standalone vibration monitor.
Q: Does the supplied data specify relay contact ratings?
A: No. The available information does not provide contact voltage, current, contact arrangement, or load-category ratings. These values should be verified against the applicable manufacturer documentation before field wiring.
Field Installation Guidelines
- Verify the 88149-01 part number against the installed 3300 Series rack and associated system documentation.
- Confirm the relay-output function before connecting external alarm, trip, control, or shutdown circuits.
- Route relay wiring separately from low-level transducer and vibration-signal wiring where practical.
- Use appropriate terminal identification and maintain correct polarity where the connected circuit requires it.
- Connect cable shields according to the site’s instrumentation grounding scheme and the applicable Bently Nevada installation documentation.
- Verify external circuit voltage and current requirements against the actual relay contact ratings before energizing the circuit.
- Perform continuity and functional checks on each connected relay circuit after installation.
- Do not infer unspecified contact ratings, environmental limits, dimensions, weight, or power requirements from the part number alone.
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