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The 3500/33 (149986-01) is a high-density relay output module designed for the 3500 Machinery Protection System developed by Bently Nevada. This module provides 16 independent relay output channels within a single rack...
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The 3500/33 (149986-01) is a high-density relay output module designed for the 3500 Machinery Protection System developed by Bently Nevada. This module provides 16 independent relay output channels within a single rack slot, enabling efficient expansion of safety and alarm signaling capabilities in large industrial protection architectures.
The 3500/33 (149986-01) acts as a hardware interface between the monitoring rack and external plant control or safety systems. Each relay channel can be individually programmed using 3500 Rack Configuration Software to respond to machine condition states such as Alert or Danger logic events derived from vibration, temperature, or process monitoring data.
The module supports complex protective logic, including AND/OR voting configurations, allowing multiple sensor conditions to be evaluated before initiating machine trip or shutdown commands. This design minimizes false trips while maintaining high safety integrity in critical machinery protection applications.
| Item | Specification |
|---|---|
| Part Number | 149986-01 |
| System Series | Bently Nevada 3500 |
| Output Channels | 16 Independent Relays |
| Relay Type | SPDT Electromechanical |
| Contact Rating | 5A @ 24 Vdc / 5A @ 240 Vac (resistive) |
| Logic Support | AND / OR voting logic |
| Diagnostic Monitoring | Relay coil and module health monitoring |
| Backplane Communication | High-speed 3500 rack integration |
| Dimensions | 24.20 cm × 2.44 cm × 24.10 cm |
| Weight | 0.70 kg |
The 3500/33 (149986-01) is widely used in:
Power generation facilities
Oil and gas refining plants
Petrochemical and chemical processing facilities
Heavy industrial rotating machinery protection systems
Typical uses include:
Driving local alarm annunciator panels
Triggering PLC/DCS digital inputs
Controlling emergency shutdown and interlock loops
Can relays be configured with voting logic?
Yes. The module supports advanced voting logic configurations. For example, a relay can be programmed to activate only when multiple monitoring channels simultaneously detect Danger conditions.
Does this module support transient data acquisition?
No. The 149986-01 is strictly a relay output module. For high-speed transient data collection, a 3500/22M Transient Data Interface (TDI) module is typically required within the same rack architecture.
