Bently Nevada 3500/62 Datasheet

3500/62 Process Variable Monitor

Datasheet

Bently Nevada Machinery Condition Monitoring

Description

The 3500/62 Process Variable Monitor is a 6-channel monitor
for processing machine critical parameters that merit
continuous monitoring, such as pressures, flows,
temperatures, and levels. 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 3500/62 monitor:

l Continuously compares monitored parameters

against configured alarm setpoints to drive alarms for
machinery protection.

l Provides essential machine information for both

operations and maintenance personnel.

You 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 three
signal input scenarios: +/-10 Volts DC, isolated 4-20 mA, or 4­20 mA with Intrinsically Safe zener barriers. The Internal Barrier
I/O provides external power input terminals to provide
intrinsically safe power to the 4-20 mA transducers

141541 Rev. L

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.

Triple Modular Redundant (TMR)Units are no longer
available for purchase.

3500/62 Process Variable Monitor
Datasheet 141541 Rev. L

Specified at +25 °C (+77 °F). Full-scale

Specifications

Inputs

range for each channel is set in the field
via 3500 Configuration Software. No
calibration is required.

Signal

+/-10 Vdc I/O -10 Vdc to +10 Vdc

4-20 mA Barrier I/O 4-20 mA DC

4-20 mA Isolated I/O 4-20 mA DC.

Voltage Compliance
(4-20 mA Barrier I/O
4-20mA out)

Isolation
(4-20 mA ISO I/O
only)

Input Impedance

+/-10V I/O 1 MΩ

4-20 mA Barrier I/O 50 Ω

4-20 mA Isolated I/O 50 Ω

Power Consumption

External transducer
Power (Internal
Barrier I/O Only)

13.66 V

500 volts

7.0 watts, typical.

+24 Vdc. +/- 5% @ 250
mA max. Fused

Outputs

Front Panel LEDs

Accuracy Within ±0.33% of full-scale

typical, ±1% maximum.

Full Scale
Range

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.

Alarm Time Delays

User can use software to set alarm delays as
follows:

Alert From 1 to 60 seconds in 1 second

intervals.

Danger From 1 to 60 seconds in 0.5

second intervals.

OK LED Indicates when the Process

Variable Monitor is operating
properly.

TX/RX LED Indicates when the Process

Variable Monitor is
communicating with other
modules in the 3500 rack.

Bypass LED Indicates when the Process

Variable is in Bypass Mode.

Signal Conditioning

Proportional Values

Proportional values are Process Variable
measurements used to monitor the machine.
The Process Variable Monitor returns current or
voltage proportional values in a variety of
different units that are configurable.

Environmental Limits

Operating
Temperature

2/10

-30°C to +65°C (-22°F to
+149°F) when used with
Internal/External Termination

3500/62 Process Variable Monitor
Datasheet 141541 Rev. L

I/O Module.

Operating
Temperature

Storage
Temperature

Humidity 95%, noncondensing.

0°C to +65°C (+32°F to +149°F)
when used with Internal Barrier
I/O Module (Internal
Termination).

40°C to +85°C
(-40°F to +185°F).

Monitor Module

Dimensions
(height x
width x
depth)

Weight 0.82 kg (1.8 lbm)

I/O Modules (without barriers)

Dimensions
(height x
width x
depth)

241.3 mm x 24.4 mm x 241.8 mm

9.50 in x 0.96 in x 9.52 in)

241.3 mm x 24.4 mm x 99.1 mm
(9.50 in x 0.96 in x 3.90 in)

Weight: 0.20 kg (0.44 lbm)

I/O Module (with barriers)

Dimensions
(height x
width x
depth)

Weight 0.46 kg (1.01 lbm)

241.3 mm x 24.4 mm x 99.1 mm
(9.50 in x 0.96 in x 3.90 in)

Rack Space Requirements

Monitor
Module

I/O
Modules

1 full-height front slot.

1 full-height rear slot.

3/10