Bently Nevada 3500/33-01-05 Relay Module – Reliable Alarm and Shutdown Interface

This relay module provides critical alarm and machine protection outputs for monitoring systems. It integrates seamlessly into the Bently Nevada 3500 monitoring system platform. The unit converts alarm and danger signals into reliable relay contacts. Users can connect external annunciators, shutdown systems, and PLCs through this interface.

Relay Output Configuration and Contact Ratings

This module features four independent relay outputs for flexible system integration. Each relay provides Form C contact configuration with both NO and NC terminals. The contacts handle 5 A at 115 V AC or 2 A at 30 V DC for various loads. Each output includes individual LED indicators for clear status visualization. Additionally, the module supports latch and non-latch operating modes.

Alarm and Danger Output Management

The 3500/33-01-05 receives alarm and danger signals from adjacent monitoring modules. It activates relays immediately when measured parameters exceed configured thresholds. Users can assign specific channels to each relay for customized protection logic. The module supports both latching and non-latching operation modes. Latching mode requires manual reset after an alarm condition. Non-latching mode automatically clears when the condition returns to normal.

Relay Status Indication and Manual Override

Each relay includes a front-panel LED showing its current energization state. A green LED indicates normal operation and non-alarm status. A red LED illuminates when the relay remains latched in an alarm condition. The module also provides a manual reset button for latching relays. This manual override enables operators to clear latched alarms after verification. Furthermore, the module includes a bypass function for maintenance activities.

System Integration with 3500 Rack

This relay module communicates with the 3500 rack through the dedicated backplane bus. It receives digital alarm signals directly from monitoring modules. The unit requires no programming or configuration for basic operation. However, advanced configuration is available via the 3500 configuration software. Users can assign relay mapping and operating modes through this software. The module stores these settings in non-volatile memory for automatic reloading.

Response Speed and Contact Life

The module achieves relay activation within 50 ms of receiving an alarm signal. This rapid response ensures timely machine protection in critical situations. Each relay has a mechanical endurance of 10 million operations for long-term reliability. Electrical endurance reaches 100,000 operations at rated loads. This durability suits continuous monitoring applications in power generation and oil and gas facilities. Consequently, users benefit from reduced maintenance and replacement costs.

Power Consumption and Environmental Specifications

The module draws 350 mA at 24 V DC from the 3500 rack power supply. Power dissipation remains below 6 W under normal operating conditions. The unit operates reliably between -10 °C and 65 °C ambient temperature. Humidity tolerance spans 0% to 90% without condensation issues. The module carries an IP20 rating for protection against solid objects. This robust design suits demanding industrial and hazardous environments.