3500/62-01-00 3500 Series Bently Nevada Process Variable Monitor

The Bently Nevada 3500/62-01-00 is a six-channel Process Variable Monitor designed for the 3500 Machinery Protection System. It accepts voltage signals from process transmitters and monitors parameters such as pressure, flow, temperature and liquid level. The module conditions incoming signals and compares measured values against programmable Alert and Danger setpoints. Its -01 configuration uses a -10 to +10 VDC I/O module with internal terminations.

Measurement and Monitoring Functions

The 3500/62 processes static proportional signals from external transmitters. It supports six independent measurement channels, allowing operators to monitor multiple process variables alongside machinery vibration data.

Typical measurement applications include:

• Pressure: Monitoring fluid pressure and compressor suction or discharge pressure.
• Flow: Processing proportional signals from flow transmitters.
• Temperature: Monitoring temperature signals from compatible transmitters.
• Level: Monitoring liquid level through proportional voltage signals.
• Other Process Variables: Accepting suitable static voltage signals within the specified input range.

Furthermore, the monitor compares conditioned signals with configured alarm thresholds. It supports both under-range and over-range alarms, allowing operators to identify deviations from normal process conditions.

I/O Configuration

The complete model number 3500/62-01-00 identifies a specific input and approval configuration:

• 3500/62: Six-channel Process Variable Monitor.
• -01: -10 to +10 VDC I/O Module with Internal Terminations.
• -00: No agency approval option.

This configuration accepts voltage inputs rather than the isolated 4-20 mA input versions available for the 3500/62 platform. Therefore, check the transmitter output signal and termination arrangement before selecting a replacement.

Signal Processing and Alarm Settings

The 3500/62 uses 3500 Rack Configuration Software to configure the full-scale measurement range for each channel. The input signal is converted into proportional process-variable values that operators can use for monitoring and alarm management.

Key signal-processing characteristics include:

• Measurement accuracy: +/-0.33% of full scale typical, +/-1% maximum.
• Maximum full-scale range: 20,000 units mapped across the input signal span.
• Minimum voltage input span: 2 V.
• Alarm accuracy: Within 0.13% of the desired value.
• Alert delay: 1 to 60 seconds, adjustable in 1-second intervals.
• Danger delay: 1 to 60 seconds, adjustable in 0.5-second intervals.
• Alarm thresholds: Adjustable from 0 to 100% of full scale, subject to sensor range limitations.

Technical Specifications

Installation and Configuration Notes

The 3500/62-01-00 occupies one full-height front slot for the monitor and one full-height rear slot for the I/O module in the 3500 rack.

Furthermore, the internal termination configuration does not support external termination blocks. Check the existing rack configuration and field wiring before replacement.

When adding this module to an existing 3500 system, the manufacturer's documented minimum software and firmware requirements include:

• 3500/20 Module Firmware: Version 1.07 (Rev G).
• 3500/01 Software: Version 2.20.
• 3500/02 Software: Version 2.10.
• 3500/03 Software: Version 1.20.

Frequently Asked Questions

Q: What is the main function of the Bently Nevada 3500/62-01-00?

A: It monitors six process-variable input channels, processes voltage signals and compares measured values against programmable alarm thresholds.

Q: Does the 3500/62-01-00 support 4-20 mA inputs?

A: This particular configuration uses a -10 to +10 VDC I/O module. Other 3500/62 ordering configurations support isolated or barrier-based 4-20 mA inputs.

Q: What is the difference between 3500/62-01-00 and 3500/62-02-00?

A: Both use -10 to +10 VDC inputs. The -01 configuration has internal terminations, whereas -02 uses external terminations. The external termination arrangement requires compatible termination blocks and cables.