Bently Nevada 138700-01

Ordering Information

Product Description

3500/42M-AA-BB

A: I/O Module Type

See I/O Module Types on page 19.

B: Hazardous Area Approval Option

00

None

01

CSA / NRTL / C (Class 1, Division 2)

02

ATEX / IECEx / CSA (Class 1, Zone 2)

Technical Parameters

Channels: 4 proximity-probe inputs (active eddy-current probes) for Bently Nevada 138700-01

Probe Excitation: –23 V DC, 12 mA per channel (isolated via internal barriers)

Input Range: 0–50 V p-p probe output

Signal Conditioning:

Internal 1 kΩ probe-termination resistors

Programmable gain and offset via rack CPU in Bently Nevada 138700-01

Selectable 1×, 2× and broadband filter bands

Isolation:

Intrinsic-safety zener barriers per channel

1 kV channel-to-chassis galvanic isolation

Alarm/Status Outputs: Digital data over 3500 backplane bus using Bently Nevada 138700-01; onboard LEDs for channel-present and fault

Power: 24 V DC (18–32 V DC), ≤ 4 W module consumption

Environmental:

Operating Temp: 0 °C to +70 °C

Storage Temp: –40 °C to +85 °C for Bently Nevada 138700-01

Humidity: ≤ 95 % RH, non-condensing

Product function

Conditions eddy-current probe signals through Bently Nevada 138700-01—applying excitation, filtering, and linearization—and digitizes them into vibration and clearance data. Communicates measurements and sensor-health diagnostics via the 3500 Series rack's high-speed digital bus.

Core Supporting Modules

3500/65 Loss-of-Signal Module: To detect probe or cable failures

3500/01 System Interface Module: Aggregates conditioned data

3500/03 Relay Module: Provides form-C relay outputs

3500/04 Analog-Output Module: Converts measured values

Proximity Probes & Cables: 3300 XL series probes interfacing with Bently Nevada 138700-01