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Bently Nevada 990-04-XX-01-00 Vibration Transmitter Module

The Bently Nevada 990-04-XX-01-00 MOD:147202-01 also cataloged as the 990-04-XX-01-00 Vibration Transmitter operates as a dedicated hardware component for vibration amplitude conversion and 4-20 mA loop signal conditioning within the Bently Nevada 990 monitoring channel.

Configured for direct electrical execution of vibration measurement signal conditioning in the 990 transmitter loop architecture, the Bently Nevada 990-04-XX-01-00 MOD:147202-01 (990-04-XX-01-00 Vibration Transmitter) provides analog output conversion without embedded processing layers.

Suffix Breakdown & Model Matrix

• 990: Vibration transmitter series platform
• 04: 0–4 mils peak-to-peak measurement range (0–100 um pp)
• XX: Configuration variant placeholder (system-dependent selection)
• 50 / 70 (optional variants in series context): Cable length configuration (meters/feet scaling)
• 01: DIN rail mounting clip configuration (35 mm DIN rail)
• 00: No additional option module installed
• MOD:147202-01: Reference module assembly identifier (RMOD4140 / 3300XL 8 mm / 5 m association noted in provided dataset)

Hardware Specifications

Parameter	Specification
ModelBrand	Bently Nevada 990-04-XX-01-00 MOD:147202-01
Origin	USA
Weight	0.44 kg
Dimensions	7.3 x 5 x 10 cm
Frequency Response	5 Hz to 6000 Hz (+0 / -3 dB)
Loop Resistance	1000 ohm maximum (including cable at 35 Vdc)
Current Limiting	23 mA typical
Measurement Range	0–4 mils pp (0–100 um pp)
Mounting	35 mm DIN rail clip (01 option)

Eddy-Current Probe Scaling and Signal Conditioning Behavior

The 990 transmitter architecture is aligned with eddy-current proximity probe scaling conventions, translating mechanical shaft vibration displacement into proportional loop current output. Gap voltage validation is implicitly referenced through the -10 VDC sensor operating domain typical of proximity probe front-end excitation stages. Signal conversion maintains linearity across the defined 5 Hz to 6000 Hz bandwidth, with cross-talk suppression achieved through localized loop isolation and constrained impedance loading within the 1000 ohm loop resistance envelope.

Frequently Asked Questions

Q: Does the device support hot-swap replacement during operation?
A: No hot-swap capability is defined. Removal requires loop de-energization to prevent current interruption on the 4-20 mA output circuit.

Q: What is the maximum allowable loop resistance impact on signal accuracy?
A: The transmitter supports up to 1000 ohm total loop resistance including cable, referenced at a 35 Vdc supply condition.

Q: Is firmware upgrade applicable to this transmitter model?
A: No firmware layer is present. The unit operates as an analog signal conditioning device without programmable logic.

Field Installation Guidelines

• Install on standard 35 mm DIN rail ensuring mechanical locking of the mounting clip (01 configuration).
• Maintain separation between input sensor wiring and output loop wiring to reduce induced coupling.
• Use shielded cabling for proximity probe inputs; terminate shield at single-point ground only.
• Verify loop supply voltage compatibility prior to energization (nominal 35 Vdc system constraint).
• Ensure loop resistance remains within specified 1000 ohm limit including total cable length contribution.

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