The Bently Nevada 3500/62 133811-03, also cataloged as the 3500/62 Process Variable Monitor, operates as a multi-channel signal acquisition and conditioning module for analog process variable inputs within the Bently Nevada 3500 rack monitoring system. The unit accepts -10 VDC to +10 VDC and 4-20 mA barrier I/O signals, converting them into internally processed measurement values for comparison against configured alarm logic within the rack system.

Hardware Specifications

Signal Conditioning and Channel Isolation Behavior

The module performs analog signal acquisition with galvanically isolated input channels rated at 500 V isolation barrier strength. Input conditioning circuitry linearizes both voltage and current loop signals into normalized internal data structures for rack-level processing. Cross-channel separation is maintained through isolated conversion stages, limiting interference between 4-20 mA loop interfaces and bipolar voltage inputs. Accuracy behavior is defined across full-scale measurement range with temperature-dependent drift compensation applied within system calibration limits.

Ordering info

• 1 x 3500/62 133811-03 process variable monitor module

• 1 x rack backplane interface connector set

• 1 x terminal block assembly

• 1 x factory calibration and configuration label set

Field Installation Guidelines

Signal Wiring

• Use shielded twisted pair for 4-20 mA loop connections

• Maintain separation between voltage and current signal wiring

Rack Integration

• Install into compatible Bently Nevada 3500 series rack slot

• Verify full backplane seating prior to system energization

Grounding Requirements

• Maintain single-point earth grounding for signal shield

• Avoid ground loops across isolated channels

Operational Verification

• Confirm input scaling for -10 VDC to +10 VDC range

• Validate 4-20 mA loop integrity under load conditions

Frequently Structured Technical Queries

• What input types are supported?
  The module supports -10 VDC to +10 VDC voltage inputs and 4-20 mA DC loop signals with barrier isolation.

• What is the channel isolation level?
  Input channels are galvanically isolated up to 500 V.

• What is the typical power consumption?
  The module consumes approximately 7.0 W under normal operating conditions.

• What is the measurement accuracy?
  Accuracy is +/-0.33 percent typical and +/-1 percent maximum across full scale.

• What is the voltage compliance limit?
  Voltage compliance is specified at 13.66 V for loop operation.

• Can voltage and current inputs be used simultaneously?
  Configuration dependent; channels are assigned per system setup within rack architecture.

• What is the operating temperature range?
  -30 deg C to +65 deg C operating, storage down to -40 deg C.

• Does the module support hot-swap?
  Rack-level insertion requires controlled power conditions; hot-swap depends on system configuration rules.