Description
Bently Nevada 135489‑01 Internal‑Barrier Internal‑Termination I/O Assembly
Product Overview
135489‑01 is a four‑channel internal‑termination I/O assembly with built‑in intrinsic‑safety barriers for 3500/42M Proximitor/Seismic Monitor (176449‑02) within Bently Nevada 3500 machinery‑protection system. It provides rear‑rack wiring terminals for proximity probes, Velomitor seismic transducers and accelerometers installed in hazardous classified zones. Integrated IS barriers provide explosion‑proof protection for field sensor circuits, transmitting vibration and position signals to the 3500/42M main monitor via rack backplane connector. It cannot operate independently and must mount behind 176449‑02 within the same rack slot.
Part‑number distinction:
- 135489‑01: IS‑barrier I/O for 3500/42M (Prox / Velomitor)
- 135489‑03: IS‑barrier I/O for 3500/70M (reciprocating impulse‑velocity monitor) These two share similar part‑number but are not interchangeable。
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | 135489‑01 |
| Matching Main Board | 3500/42M (176449‑02) Proximitor/Seismic Monitor |
| Termination Style | Internal Termination with integrated intrinsic‑safety barrier |
| Input Channels | 4 independent channels |
| Supported Sensors | Proximity probes, Velomitor velocity transducers, accelerometers |
| Hazardous‑Area Compliance | ATEX / FM / CSA intrinsic‑safety approval for Class I Div 2 hazardous‑zone field instruments |
| Power Supply | Powered by 3500 rack backplane bus |
| Typical Power Consumption | 1.7 W |
| Operating Temperature | ‑30 ℃ ~ +65 ℃ (rack environment); Storage:‑40 ℃ ~ +85 ℃ |
| Form Factor | Single‑slot plug‑in for standard 3500 instrument rack |
| Weight | Approx. 0.46 kg |
| Compliance | API 670; TMR triple‑modular‑redundancy architecture compatible |
| Installation | Installed directly behind 176449‑02 main monitor in identical rack slot |
3500/70M 135489-01
Key Features
- Built‑in intrinsic‑safety barrier: Eliminates external barrier modules. Permits direct connection to sensors located inside explosive‑gas hazardous zones for oil‑gas and petrochemical projects.
- Internal termination design: Field sensor cables land directly on rear rack screw‑type terminals, no intermediate jumper cables required, simplifies cabinet layout.
- Four‑channel mixed‑sensor support: Each channel configurable for proximity probe (displacement/thrust) or seismic velocity transducer. Mixed sensor types are allowed within one I/O assembly.
- Full transducer‑loop supervision: Enables 3500/42M main board to detect sensor open‑circuit, short‑circuit and cable‑loop fault diagnostics.
- TMR‑capable: Supports triple‑modular‑redundancy voting configuration for high‑safety machinery‑protection applications.
- Configuration‑transparent hardware: No standalone software setup. All sensor parameters, alarm thresholds and filter settings are configured in 3500 Rack Configuration Software for paired 3500/42M monitor.
- Hot‑swap capability: Supports online module replacement following official Bently maintenance procedure.
Related I/O comparison
- 135489‑01: Internal‑termination + IS‑barrier for 3500/42M, hazardous‑area sensors.
- 140471‑01: Non‑barrier internal‑termination for 3500/42M, safe‑area sensors only.
- 140481‑01: External‑termination I/O for 3500/42M.
- 135489‑03: IS‑barrier I/O for 3500/70M reciprocating‑compressor monitor (non‑interchangeable).
Typical Applications & Application Scenarios
Main Applications
- Intrinsically‑safe signal interface for proximity probes and seismic sensors paired with 3500/42M monitor.
- Measure radial shaft vibration, thrust position, eccentricity for critical rotating machinery.
- Deliver vibration and position data for Alert / Danger alarm, machinery‑protection trip interlock and predictive‑maintenance trending.
Industry Scenarios
- Oil & gas: offshore platforms, refineries, natural‑gas compressor stations with ATEX / Class I Div 2 classified hazardous zones.
- Petrochemical plants: process centrifugal compressors, turbo‑expanders in explosive‑gas environments.
- Power generation: chemical‑fuel power plants complying with API 670 requirements for hazardous‑location machinery‑protection.
Supporting / Matching Components
- Mandatory paired main monitor: 176449‑02 (3500/42M) Proximitor/Seismic Monitor, standalone operation not permitted.
- Host rack: 3500/05 instrument rack.
- Rack power supply: 3500/15 series power‑supply modules.
- Field sensors: IS‑certified proximity‑probe systems, Velomitor transducers and shielded intrinsically‑safe field cables.
- Auxiliary modules:
- 3500/32M / 3500/33 relay modules: hardware alarm & trip contact output.
- 3500/92 / 3500/77M gateway modules: upload vibration/position data and alarms to DCS, SCADA or System 1 predictive‑maintenance platform.
- Configuration software: Bently Nevada 3500 Rack Configuration Software.
3500/70M 135489-01
Related & Reference Part Numbers
- 176449‑02: 3500/42M main monitor board
- 140471‑01: Non‑barrier internal‑termination I/O for 3500/42M
- 140481‑01: External‑termination I/O assembly for 3500/42M
- 3500/42M‑01‑02: Complete assembly (176449‑02 + 135489‑01 internal‑barrier I/O)
- 135489‑03: IS‑barrier I/O dedicated for 3500/70M reciprocating‑compressor monitor
Installation & Maintenance Notes
- 135489‑01 must install behind 176449‑02 within the same rack slot; cannot mix‑use barrier‑type and non‑barrier‑type I/O for a single 3500/42M monitor set.
- Only connect intrinsically‑safe certified field sensors and cables to this assembly, strictly comply with local hazardous‑area installation codes.
- Separate IS signal wiring from high‑voltage non‑IS cables to avoid noise and safety hazards.
- After hardware installation, validate channel health status, sensor fault‑detection and alarm‑logic inside 3500 configuration software.
- Execute hot‑swap replacement strictly following Bently Nevada official service manual.
Start Chat
