Overview
The Bently Nevada 3500/34, also cataloged as the 3500/34 4-Channel Relay Module, provides relay contact switching functions for alarm and control outputs within the Bently Nevada 3500 Machinery Protection System platform. The module uses SPDT relays with epoxy-sealed construction for discrete electrical circuit execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 3500/34 |
| Brand | Bently Nevada |
| Product Type | 4-Channel Relay Module |
| Origin | USA |
| Weight | 0.35 kg |
| Dimensions | 2.6 x 25.3 x 12 cm (shipping size) |
| Operating Temp | -30 deg C to +65 deg C (-22 deg F to +150 deg F) |
| Storage Temp | -40 deg C to +85 deg C (-40 deg F to +185 deg F) |
| Humidity | 95%, non-condensing |
| Power Consumption | 5.8 Watts typical |
| Relay Type | Single-pole, double-throw (SPDT) relays |
| Number of Channels | 4 relay channels |
| Minimum Switched Current | 100 mA at 12 VDC |
| Maximum Switched Current | 2 A at 0 V to 30 VDC |
| Maximum Switched Voltage | 30 VDC |
| Contact Life | 100,000 cycles at 5 A, 24 VDC or 240 VAC |
| Environmental Sealing | Epoxy-sealed relay construction |
| Arc Suppressor | 250 Vrms arc suppressor installed as standard |
| Tariff Code | 8537101190 |
Machinery Protection Relay Signal Switching Characteristics
The Bently Nevada 3500/34 module interfaces with the 3500 monitoring rack to execute discrete relay outputs generated by machinery protection logic. The relay contacts provide SPDT switching for external alarm circuits, shutdown circuits, and annunciation systems.
Furthermore, the module operates within the Bently Nevada 3500 architecture where protection logic depends on accurate vibration monitoring, eddy-current probe scaling, and validated measurement channels. Relay activation follows configured alarm states from monitoring modules, while the output contacts provide electrical isolation between internal monitoring circuits and external field devices.
The 3500 platform typically applies gap voltage validation with -10 VDC targets for proximity measurement systems. Therefore, correct relay response depends on validated monitor status, proper channel configuration, and accurate rotor dynamics evaluation.
Frequently Asked Questions
Q: What type of relay contacts does the Bently Nevada 3500/34 use?
A: The 3500/34 uses four single-pole, double-throw (SPDT) relay outputs for discrete switching applications.
Q: What is the maximum switching capability of the relay channels?
A: Each relay channel supports up to 2 A switching current at 0 V to 30 VDC and a maximum switched voltage of 30 VDC.
Q: Does the 3500/34 require external arc suppression components?
A: No. A 250 Vrms arc suppressor is installed as standard within the relay module design.
Field Installation Guidelines
Install the 3500/34 module in the designated slot position of the Bently Nevada 3500 rack according to system configuration requirements.
Verify relay wiring polarity, contact assignment, and external circuit voltage levels before energizing the module. Keep relay output wiring separated from high-voltage power conductors to reduce electrical interference.
Use proper grounding practices for the machinery protection rack and maintain shield termination according to site electrical standards. Confirm relay operation through system diagnostics and configured alarm tests before placing the protection system into service.
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