Description
Bently‑Nevada 176449‑02 Front Board (3500/42M Proximitor / Seismic Monitor)
Product Description
The 176449‑02 is the front processing main board for Bently‑Nevada 3500/42M four‑channel Proximitor / Seismic Monitor within 3500 machinery protection rack system. It pairs with different rear I/O termination boards to constitute a complete monitor assembly.
This 4‑channel programmable monitor accepts signals from proximity probes, velocity transducers and accelerometers. It implements multi‑parameter measurement, filtering, Alert / Danger alarm comparison and local machinery‑protection logic. Channels are configured in pairs, supporting two different measurement functions running simultaneously inside one module. It communicates with rack TDI over backplane bus, uploading real‑time measurements, buffered transducer signals, recorder outputs, alarm events and diagnostic data to System 1 predictive‑maintenance software. Protection judgment executes locally on‑board; monitoring and alarm functions keep working even if host‑software communication fails. OEM production discontinued; supplied only as aftermarket replacement spare for legacy turbomachinery TSI racks。
Part Number Breakdown‑176449‑02：Front main processing board for 3500/42M‑Matching rear I/O options：internal screw‑terminal, external termination board‑Complete assembly model：3500/42M‑XX‑XX‑00‑No third‑party safety‑agency certification
350045 176449-04
Technical Specifications
| Item | Specification |
|---|---|
| Part Number | 176449‑02 |
| Product Type | Front CPU Processing Board for 3500/42M Monitor |
| Channel Quantity | 4 independent input channels, configured by channel‑pair (Ch1‑2, Ch3‑4) |
| Supported Sensors | Proximity probe, Velomitor velocity transducer, accelerometer |
| Measurement Functions | Radial Vibration, Thrust Position, Differential Expansion, Eccentricity, REBAM, Velocity, Acceleration, Shaft‑Absolute, Circular Acceptance Region |
| Transducer Power | ‑24 VDC sensor excitation power |
| Input Impedance | 10 kΩ for proximity & acceleration inputs |
| Buffered Output | Coaxial buffered transducer output per channel, short‑circuit protected |
| Recorder Output | 4‑20 mA analog recorder output per channel |
| Typical Power Consumption | 7.7 W, powered by rack backplane bus |
| Front‑panel Indicators | Module OK LED, Bypass LED, channel alarm LED indicators |
| Hot‑swap Rule | Rear I/O board supports hot‑swap under rack powered‑on; front 176449‑02 board requires slot power‑off before removal |
| Dimension(H×W×D) | 241.3 mm ×24.4 mm ×99.1 mm (9.50 in ×0.96 in ×3.90 in) |
| Operating Temperature | ‑30 °C ~ +65 °C (‑22 °F ~ +149 °F) |
| Storage Temperature | ‑40 °C ~ +85 °C (‑40 °F ~ +185 °F) |
| Relative Humidity | 5‑95 % RH, non‑condensing |
| Product Status | Discontinued OEM production, aftermarket spare‑part only |
Variant note for 3500/42M rear I/O‑ Internal screw‑terminal rear board; external termination rear board variant available. Front board 176449‑02 is compatible with multiple rear I/O versions of 3500/42M.
Key Features & Benefits
- Multi‑sensor compatible four‑channel monitor: Supports proximity, velocity and acceleration transducers in one module. Realizes shaft relative vibration, casing vibration, thrust position, differential expansion and eccentricity monitoring, reduces rack‑slot occupancy for multi‑parameter turbomachinery protection.
- Dual‑function channel‑pair configuration: Two groups of channel‑pairs can run different measurement functions simultaneously. Flexible for mixed‑signal monitoring requirements within single rack slot.
- Independent local protection logic: Alarm threshold comparison and machinery‑protection judgment run on‑board hardware. Loss of TDI‑to‑host communication will not affect alarm and protection functions, guarantees protection integrity complying with API‑670 standard.
- Rich signal output interfaces: Buffered transducer coaxial outputs for external analysis instruments; per‑channel 4‑20 mA recorder analog outputs for chart recorder or third‑party acquisition system.
- Comprehensive self‑diagnosis function: Detects sensor open‑circuit, short‑circuit, hardware faults; all fault codes and time‑stamped events are stored in rack event‑log for rapid on‑site troubleshooting.
- Full backward compatibility with 3500 ecosystem: Cooperates with 3500/15 redundant power‑supply, 3500/22‑TDI gateway, 3500/32‑33 relay‑output modules and official rack configuration software. Must be mated with matching rear I/O board.
Application Fields
‑ Power‑generation, petrochemical and natural‑gas facilities: front processing board of 3500/42M monitor for steam‑turbine, gas‑turbine, centrifugal‑compressor and reciprocating‑compressor TSI protection racks. Monitors shaft vibration, thrust position, differential expansion and casing vibration parameters for critical rotating equipment.‑ Industrial rotating‑machinery projects requiring mixed proximity‑and‑seismic‑signal acquisition and machinery‑protection.‑ Spare‑part replacement and retrofit for legacy 3500 racks originally equipped with 3500/42M (176449‑02) monitor assembly.
Related Recommended Products
‑ Matching rear I/O termination board for 3500/42M‑ 3500/05 series: 3500‑system rack chassis‑ 3500/15 series: Redundant rack power‑supply modules‑ 3500/22 / 3500/22M TDI: Transient‑data‑interface gateway for configuration download, waveform capture and event‑log reading‑ 3500/32 / 3500/33: Relay‑output modules for hard‑wire dry‑contact alarm interlock‑ 3500 Rack Configuration Software: Tool for channel‑pair function assignment, Alert / Danger setpoint and filter‑parameter setup‑ System 1® Condition‑Monitoring Software: Host platform for vibration trending, waveform analysis and fault diagnosis.
Installation and Maintenance
Installation
- Firmly mate front processing board 176449‑02 with corresponding matched rear I/O board to complete full 3500/42M assembly; insert into any available full‑height slot of 3500 rack.
- Wire field proximity / seismic transducer cables onto rear‑board terminals, strictly follow sensor installation and wiring specifications.
- Connect configuration laptop to TDI via USB port, launch 3500 Rack Configuration Software; assign channel‑pair measurement functions, configure filter parameters, Alert / Danger alarm setpoints and delay values, download configuration to rack.
- Power‑up rack; verify front‑panel module OK‑LED stays illuminated; inspect rack event‑log for sensor faults or module hardware alarms; simulate sensor signals to validate alarm triggering and output functions.
Important Note: Only rear‑side I/O board supports hot‑swap under rack powered‑on. Front‑side 176449‑02 replacement requires corresponding slot power cut‑off. Mismatched front‑rear part‑number combination may result in abnormal measurement or hardware damage.
Maintenance
- Routine inspection: check rear‑board terminals for dust accumulation, corrosion and loose wiring connections; observe front‑panel LED status.
- Periodically download rack event‑log to review sensor faults, over‑range status and alarm historical records.
- When rear‑I/O circuit fault occurs, perform hot‑swap replacement for rear termination board under rack powered‑on condition; verify each‑channel measurement and output functions after replacement.
- When front‑processing‑board hardware fault occurs, cut off slot power before replacing 176449‑02 board; reassemble with matched rear‑I/O module, re‑download rack configuration and validate full‑function recovery.
- Avoid mechanical shock and conductive contamination during module‑handling. Refer to Bently‑Nevada official document Doc‑129768 (3500/42M Monitor Datasheet & Operation Manual) for complete installation constraints and detailed troubleshooting guidance.
Start Chat
