Description
Bently Nevada 140482‑02 External Termination I/O Assembly
140482-02
Product Overview
140482‑02 is the external‑termination I/O accessory for 3500/64M (176449‑05) Dynamic Pressure Monitor within Bently Nevada 3500 machinery‑protection system. Unlike internal‑termination 140471‑02, this unit does not accept field sensor wiring directly at the rear of the rack slot. Instead, it uses dedicated interconnection cables to link toward external termination blocks placed inside the cabinet. It forms a complete 4‑channel dynamic‑pressure signal acquisition set together with the main monitor board 176449‑05, for high‑frequency pulsation measurement of gas turbines and compressors.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | 140482‑02 |
| Matching Main Board | 3500/64M (176449‑05) Dynamic Pressure Monitor |
| Termination Style | External Termination (ET) |
| Input Channels | 4 dynamic‑pressure transducer signal channels |
| Interconnection | Requires dedicated 3500 dynamic‑pressure I/O cable (129525‑xxxx‑xx) connecting to external terminal blocksBaker Hugh… |
| Power Supply | Supplied via 3500 rack backplane bus |
| Power Consumption | Max 1.5 W |
| Operating Temperature | ‑30 ℃ ~ +65 ℃ (rack); Storage:‑40 ℃ ~ +85 ℃ |
| Form Factor | Single‑slot plug‑in for standard 3500 instrument rack |
| Weight | Approx. 0.46 kg |
| Compliance | API 670 compliant for machinery‑protection applications |
| Installation | Mounted behind 176449‑05 monitor inside the same rack slot |
140482-02
Key Features
- External termination architecture: Field sensor cables land on separate external terminal blocks rather than rack rear side. This isolates high‑frequency sensor wiring from rack back‑plane area, improving EMC performance in high‑noise cabinet environments.
- Four‑channel full matching: Corresponds exactly to 4 input channels of 3500/64M, maintains signal integrity up to 10 kHz bandwidth for dynamic‑pressure pulsation measurement.
- Transducer loop supervision support: Enables main monitor board to detect cable open‑circuit, short‑circuit and transducer fault conditions.
- Flexible cabinet layout: External terminals can be positioned closer to field cable entry points; convenient for cabinet pre‑wiring, test and maintenance without accessing rack rear.
- Hot‑swap capable: Supports hot‑plug replacement in 3500 rack while following official maintenance procedure.
- Transparent to configuration: No independent software setup required. All alarm, filter and sensor‑sensitivity parameters are configured within 3500 Rack Configuration Software for paired 3500/64M monitor.
Difference vs 140471‑02 (Internal Termination)
- 140471‑02: Internal termination, field wires connect directly to rear of rack module, no extra interconnection cables needed.
- 140482‑02: External termination, needs I/O jumper cables plus separate external terminal blocks, better for high‑EMI sites and pre‑fabricated cabinet wiring projects.
Typical Applications & Application Scenarios
Main Applications
- Signal interface for dynamic‑pressure sensors paired with 3500/64M monitor.
- Capture high‑frequency pressure pulsation: gas‑turbine combustion oscillation monitoring, centrifugal / axial compressor anti‑surge early warning, reciprocating‑compressor cylinder pressure pulsation acquisition.
- Complete signal‑path hardware for machinery protection and spectrum analysis of dynamic‑pressure data.
Industry Scenarios
- Power generation: combined‑cycle power plants, large gas‑turbine units.
- Oil & gas: natural‑gas pipeline compressors, refinery turbo‑machinery.
- Petrochemical: reciprocating compressors and critical process turbo‑equipment.
- Sites with high electromagnetic interference, projects adopting pre‑wired cabinet design per API 670 specifications.
Supporting / Matching Components
- Mandatory paired monitor module: 176449‑05 (3500/64M) Dynamic Pressure Monitor, cannot operate independently.
- Host rack: 3500/05 instrument rack.
- Rack power supply: 3500/15 series power‑supply modules.
- External termination blocks:
- 128015‑09: Dynamic‑pressure ET block, terminal‑strip styleBaker Hugh…
- 125808‑09: Dynamic‑pressure ET block, Euro‑style connectorBaker Hugh…
- Interconnection jumper cable: 129525‑AAAA‑BB series dynamic‑pressure I/O cable (multiple length options available)Baker Hugh….
- Field devices: High‑frequency dynamic‑pressure transducers and shielded sensor cables.
- Auxiliary system modules: 3500/32M / 3500/33 relay modules; 3500/92 / 3500/77M communication gateways for DCS / SCADA data upload.
- Configuration tool: Bently Nevada 3500 Rack Configuration Software.
Related & Reference Part Numbers
- 140471‑02: 3500/64M internal‑termination I/O assembly (alternative hardware option)
- 176449‑05: 3500/64M main dynamic‑pressure monitor board
- 128015‑09: ET block terminal‑strip type
- 125808‑09: ET block Euro‑connector type
- 129525‑xxxx‑xx: I/O jumper cable series between 140482‑02 and external blocks
Installation & Maintenance Notes
- 140482‑02 must install behind 176449‑05 within same rack slot; standalone operation is not allowed.
- Select correct length of 129525‑xx interconnection cables according to cabinet layout.
- Use shielded high‑frequency sensor cables; separate signal wiring from high‑power cables to avoid signal distortion.
- After hardware installation, verify channel health and transducer fault‑detection function in 3500 configuration software.
- Follow Bently official service manual for hot‑swap replacement.
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