3500/62 Process Variable Monitor Bently Nevada

3500/62 Process Variable Monitor Bently Nevada

Description 

The 3500/62 Process Variable Monitor is a 6-channel monitor for processing machine critical parameters (pressures, flows, temperatures, levels, etc.) that merit continuous monitoring.  The monitor accepts +4 to +20 mA current inputs or any proportional voltage inputs between -10 Vdc and +10 Vdc.  It conditions these signals and compares the conditioned signals to user-programmable alarm setpoints.   The user can program the 3500/62 using the 3500 Rack Configuration Software to perform either current or voltage measurements. The 3500/62 offers I/O modules for 3 signal input scenarios: +/-10 Volts DC, isolated 4-20mA, or 4-20 mA with Intrinsically Safe zener barriers. The Internal Barrier I/O provides external power input terminals to provide intrinsically safe power to the 4-20mA transducers The primary purposes of the 3500/62 monitor are to:   1. continuously compare monitored parameters against configured alarm setpoints to drive alarms for machinery protection, and 2. provide essential machine information for both operations and maintenance personnel.   When used in a Triple Modular Redundant (TMR) configuration, you must install Process Variable Monitors adjacent to each other in groups of three. When used in this configuration, the monitor employs two types of voting to ensure accurate operation and to avoid loss of machinery protection due to single-point failures.

Specifications 

Inputs Signal +/-10 Vdc I/O 4-20mA Barrier I/O 4-20mA Isolated I/O -10 Vdc to +10 Vdc 4-20mA DC 4-20mA DC. Voltage Compliance (4-20mA Barrier I/O 4-20mA out) 13.66 V Isolation (4-20mA Iso I/O only) Input Impedance +/-10V I/O 4-20mA Barrier I/O 4-20mA Isolated I/O Power Consumption External transducer Power (Internal Barrier I/O Only) 500 volts 1 M  50  50    7.0 watts, typical. +24 Vdc. +/- 5% @ 250 mA max. Fused Outputs Front Panel LEDs OK LED TX/RX LED Bypass LED Indicates when the Process Variable Monitor is operating properly. Indicates when the Process Variable Monitor is communicating with other modules in the 3500 rack. Indicates when the Process Variable is in Bypass Mode. Signal Conditioning Specified at +25 C (+77 F).   Full-scale range for each channel is set in the field via 3500 Configuration Software. No calibration is required. Accuracy Full Scale Range Within ±0.33% of full-scale typical, ±1% maximum. Maximum 20,000 units mapped over the input signal span.   Minimum input signal span for voltage input is 2 volts. Alarms Alarm Setpoints User can set Alert and Danger setpoints for the value measured by the monitor. Alarms are adjustable and can normally be set from 0 to 100% of full-scale for each measured value. The exception is when the full-scale range exceeds the range of the sensor in which case the setpoint will be limited to the range of the sensor. Accuracy of alarms is to within 0.13% of the desired value. The Process Variable Monitor has both under and over alarm setpoints.