Bently Nevada 88984-01

Ordering Information

Spare Relay Module

Assemblies (Order the option in parenthesis for ATEX approved spares)

81544-01(02)

No Relays

81545-01(02)

Dual Epoxy Relays

81546-01(02)

Dual Hermetic Relays

84152-01(02)

Quad Relays

88984-01(04)

Dual Hermetic, Internal Barriers

88984-02(05)  

Dual Epoxy, Internal Barriers

88984-03(06)  

No Relay, Internal Barriers

Technical Parameters

Channels: 2 independent axial-position (thrust) inputs for Bently Nevada 88984-01

Input Types Supported:

Differential linear transducer (LVDT) inputs (4-wire)

±10 V potentiometric transducer inputs

Input Ranges:

LVDT excitation: 3 Vrms @ 2 kHz, span selectable 0–1 mm, 0–2 mm, or 0–5 mm in Bently Nevada 88984-01

Voltage span: ±5 V, ±10 V user-selectable

Resolution: 16-bit A/D conversion (~ 0.002 % of span)

Accuracy: ± 0.1 % of full-scale after calibration

Sampling Rate: 1 kHz per channel, simultaneous

Outputs:

Digital data on 3500 backplane bus (time-stamped axial position)

Discrete alarm flags for out-of-range or sensor-fault per channel

Isolation: ≥ 1 kV channel-to-chassis and channel-to-channel

Power Consumption: 24 V DC via rack backplane, ≤ 5 W

Environmental:

Operating Temp: 0 °C to +70 °C

Storage Temp: –40 °C to +85 °C

Humidity: ≤ 95 % RH, non-condensing

Product function

Alarm Signaling: Receives discrete commands and actuates relay contacts via Bently Nevada 88984-01.

High-Density Output: Consolidates eight alarm/trip outputs in one module.

Self-Diagnostics: Monitors coil-drive health and reports contact faults.

Flexible Wiring: Screw-terminal block for field connections.

Application Areas

Turbine & Compressor Protection: Driving overspeed-trip solenoids with Bently Nevada 88984-01.

Generator & Motor Monitoring: Activating bearing-fault alarms.

Process-Plant Annunciators: Feeding horn/lamp circuits in control rooms.

Safety Interlocks: Integrating machinery alarms into ESD systems.

OEM Equipment: Embedded rack-mount outputs in skid systems using Bently Nevada 88984-01