3500/61 versatile monitoring function module

The Bently 3500/61 is a versatile monitoring function module manufactured by Bently Nevada, belonging to the 3500 Series Rotating Machinery Protection & Monitoring System. Designed for continuous monitoring and protection of equipment used across various applications and industries, it integrates multi-type sensor compatibility and flexible output configurations to meet diverse industrial monitoring needs. Below is its comprehensive detailed information:

1. Basic Functions

The 3500/61 is a universal equipment monitor that provides 4 sensor inputs and 4 temperature inputs, with software-configurable parameters to support multiple sensor types:

Sensor Inputs: Each sensor input can be configured (via software) to support 2-wire/3-wire accelerometers, velocity sensors, or proximity sensors—adapting to different monitoring requirements (e.g., absolute vibration via accelerometers, relative displacement via proximity sensors).
Temperature Inputs: Each temperature input is compatible with Type E, J, K, and T thermocouples (TC), as well as 2-wire/3-wire RTDs (Resistance Temperature Detectors)—enabling accurate temperature monitoring of critical components (e.g., bearings, lubricating oil tanks).

2. Output Functions

The module offers flexible output options for alarm triggering, data logging, and signal replication, ensuring seamless integration with downstream systems:

Relay Outputs: 6 Form C (SPDT) relay outputs. Using the 1900 Configuration Software, users can set relay contacts to switch on/off based on the "Normal," "Alarm," or "Danger" status of any single channel or combination of channels—supporting equipment protection actions (e.g., emergency shutdown) or alert notifications.
Recorder Outputs: 4 channels of 4-20 mA DC outputs. These outputs can be programmed to transmit data of any variable from any channel (e.g., vibration amplitude, bearing temperature) to external recorders or data acquisition systems for long-term trend analysis.
Dedicated Buffered Outputs: Provide 1:1 signal replication for each sensor input. This function allows the original sensor signal to be transmitted to external analysis tools (e.g., portable vibration analyzers) without interfering with the module’s internal monitoring logic.