Bently Nevada 990-08-XX-01-CN Vibration Transmitter (P/N 283278-01) – 4–20 mA Machine Condition Signal for DCS/PLC

The Bently Nevada 990-08-XX-01-CN is a single-channel vibration transmitter designed to turn raw machine vibration into a clean 4–20 mA process signal your DCS or PLC can actually use. It typically works with Bently Nevada proximity probe systems to monitor radial shaft vibration or thrust position on pumps, fans, small turbines, and other rotating assets. From my experience, plants choose the 990 when they want reliable trending in the control system without deploying a full rack-based condition monitoring platform.

• 4–20 mA proportional output – Feeds a stable vibration value (RMS or peak, depending on configuration) straight into DCS/PLC analog inputs.

• Buffered dynamic signal – Provides a raw dynamic vibration output for portable analyzers, so maintenance can dive deeper when needed.

• Compatible with Bently Nevada proximity probes – Typically used with 3300/3300 XL eddy-current probe systems for shaft vibration or thrust position measurements.

• DIN-rail, compact footprint – Easy to drop into existing panels; cable routing stays clean and serviceable.

• Simple power and field wiring – 24 Vdc powered, screw terminals, and clear labeling minimize commissioning time.

• Alarm scaling flexibility – You can set engineering unit scaling so operators see mm/s, µm, or mils that make sense for the asset strategy.

• Industrial temperature and noise immunity – Built for plant rooms where EMI and temperature swings are part of daily life.

• Water and wastewater – Pump trains and blowers where a clean 4–20 mA vibration tag helps operators trend bearing health.

• HVAC and utilities – Fans, compressors, and motors where a transmitter is simpler than a full condition monitoring rack.

• Oil & gas and petrochem – Aux pumps and rotating packages where space is tight but reliability still matters.

• Power generation – Small turbines or balance-of-plant assets feeding plant historian and alarm pages.

• Paper, mining, cement – Rollers, crushers, and conveyors where rugged wiring and fast swap-outs save downtime.

• Proven compatibility – Works with Bently Nevada probe systems that many plants already standardize on.

• Lower lifecycle cost – In many cases you avoid the expense of a multi-channel monitoring rack while still getting solid vibration trending.

• Fast commissioning – Fewer parameters to set; technicians typically wire, scale, and validate within a short maintenance window.

• Maintenance-friendly – Buffered dynamic output means you can plug in a portable analyzer without rewiring the loop.

• Clear spares strategy – 990-08-XX-01-CN variant and P/N 283278-01 make stocking and replacements straightforward.

• Panel/cabinet – Mount on TS-35 DIN-rail in a ventilated enclosure; keep away from high-voltage bus bars to reduce EMI.

• Power and grounding – Use a clean 24 Vdc supply with proper earth; in most cases, single-point grounding improves noise immunity.

• Probe cabling – Route probe/coax away from VFD leads; maintain bend radius and avoid sharp edges to protect the cable jacket.

• Wiring checks – Verify polarity of the 4–20 mA loop and confirm the loop load is within the transmitter’s drive capability.

• Routine care – Periodic functional checks (quarterly or semiannual), clean terminals, confirm 4–20 mA scale with a simulator.

• Calibration – Re-validate scaling after any probe or proximitor replacement; update labels in the panel so ops always sees correct units.

• Firmware/config – If your unit supports configurable parameters, keep a simple record of scaling and alarm setpoints for fast swap.

• Certifications – CE marked; RoHS compliant. Additional marks may apply by variant and region.

• Warranty – Manufacturer’s limited warranty (typically 1 year); extended coverage available via service agreements.

• Traceability – 990-08-XX-01-CN variant; factory part number 283278-01 helps ensure accurate replacement and documentation control.

• Bently Nevada 3300/3300 XL proximity probe systems – Commonly paired for radial vibration and thrust position; includes probe, extension cable, and proximitor.

• Portable vibration analyzers – Connect to the buffered dynamic output for on-the-spot diagnostics and spectral checks.

• 24 Vdc power supply modules – Industrial-grade DIN-rail supplies with low ripple improve measurement stability.

• Shielded instrument cabling – Minimizes noise pickup, especially near VFDs or high-current conductors.

Note: The “08” option in 990-08-XX-01-CN typically denotes the transmitter variant configured for proximity probe inputs; exact scaling, units, and buffered output style can vary by option code (the “XX-01-CN” portion). If you share your probe model and the measurement you want (e.g., µm pk-pk, mils, or mm/s), I can validate the best matching option set.