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- Bently Nevada
- 3500/42 138708-01+176449-02
- Proximitor/Seismic Monitor
- USA
- 241.3 × 24.4 × 241.8
- 0.46kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
- 1-3 Working Days
- DHL, UPS, TNT, FedEx and EMS.
- 24-Hour Service
- COO
- 34
Our advantage
Global Logistics
We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
Brand new and original
Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
| Company Information | |||
| sales@plc-automations.com | |||
| Mobile | +8615980777398 | ||
| +8615980777398 | |||
| 15980777398 |
Product Overview & Description
The 3500/42M 138708‑01 + 176449‑02 is a four‑channel proximitor/seismic monitoring module designed for advanced machinery protection systems. The 176449‑02 front card handles the core signal conditioning of inputs from proximity, acceleration, and velocity sensors. It offers detection of radial vibration, thrust position, differential expansion, eccentricity, acceleration, velocity, shaft positioning, and advanced diagnostics like REBAM (Rolling Element Bearing Analysis Measurement). The 138708‑01 rear card delivers isolated input/output with internal safety barriers, field‑wiring terminations, and alarm relay interfacing. Together, the pair produces a rugged, multifaceted monitor capable of hot-swapping without interrupting power or operation.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | 3500/42M 138708‑01 + 176449‑02 |
| Brand | (omitted) |
| Series | 3500 Machinery Protection – Proximitor/Seismic Monitor |
| Type | 4‑channel proximitor/seismic monitor with isolated I/O |
| Dimensions (mm) | Front: approx. 241.3 × 24.4 × 241.8; Rear: approx. 241.3 × 24.4 × 163.1 |
| Weight (kg) | Front: approx. 0.9 kg; Rear: approx. 0.46 kg |
| Input Channels | Four independent differential inputs (~10 kΩ) |
| Sensor Compatibility | Proximity, acceleration, and velocity sensors |
| Measured Parameters | Radial vibration, thrust position, expansion, eccentricity, acceleration, velocity, shaft absolute, REBAM |
| Filtering Capabilities | Programmable LP/HP/BP (0.09 Hz–4 kHz); 1X/2X vector; REBAM filters |
| Sensitivity Range | ~3.94–7.87 mV/µm (displacement), approx. 10 mV/(m/s²) (acceleration), ~20 mV/(mm/s) (velocity) |
| Accuracy | Typically ±0.33 % FS; up to ±1 % maximum |
| Power Consumption | Around 7.7 W (24 V DC rack) |
| Outputs | Buffered transducer outputs (~550 Ω), dual 4–20 mA labeller outputs, alarm relays, back‑plane communications |
| LED Indicators | Status, TX/RX, channel warnings, bypass status |
| Operating Temperature | Front: 0 °C to +65 °C; Rear: similar with safety barrier tolerance |
| Certifications | Safety barriers, rugged industrial design |
| Mounting | Rack‑mount, hot‑swappable front and rear modules |
Applications
This module fits into critical rotating machinery protection setups such as turbines, compressors, pumps, and generators. Its multi-domain monitoring (vibration, position, acceleration, velocity, bearing health) enables early detection of faults like misalignment, expansion issues, imbalance, or bearing wear. Its hot‑swappable design ensures continued system uptime during maintenance. The rear card’s safety barrier protection is ideal for hazardous or explosive environments. Plus, its analog and digital outputs blend into condition‑monitoring architectures, PLC systems, and predictive‑maintenance platforms.
Advantages
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Comprehensive monitoring: Captures multiple physical domains—position, vibration, velocity, acceleration, and structural health—all in one module.
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Excellent precision: Tight accuracy (±0.33 %) with advanced filtering ensures clean, reliable data.
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Uninterrupted operation: Hot‑swappable module design eliminates shutdowns during servicing.
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Enhanced safety: Barrier‑protected rear I/O module improves wiring robustness and reduces risk in hazardous locations.
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Flexible integration: Provides analog (buffered, 4–20 mA), relay alarm, and digital communication pathways.
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Rugged reliability: Built for extreme industrial environments—thermal, mechanical, and electrical durability.
Related Models (Same Series or Similar)
| Model | Description | Dimensions (mm) | Weight (kg) |
|---|---|---|---|
| 3500/42M + 128229‑01 | Proximitor/seismic monitor with non‑barrier rear I/O | Similar front + rear ~99 mm | ~0.20 |
| 3500/42M + 128240‑01 | Monitor with external termination I/O module | Similar | Comparable |
| 3500/40M + 135489‑01 | Displacement monitor with barrier I/O | Similar | Similar |
| 3500/40M | Four‑channel proximitor monitor (standard I/O) | Standard size | Standard |
| 3500/42M‑01‑TRIAD | Transient Data Interface version with 176449‑02 front card variant | Same front card | ~0.9 |
Popular Models (Same Brand)
| Model | Description | Dimensions (mm) | Weight (kg) |
|---|---|---|---|
| 3500/22M | Transient Data Interface (waveform capture) | Standard | ~0.9 |
| 3500/32M | 4‑Channel relay module for alarms | Same | ~0.9 |
| 3500/33 | Temperature monitoring module (RTD/thermocouple) | Same | ~0.9 |
| 3500/50M | Speed (tachometer) detection module | Same | ~0.9 |
| 3500/60 | Multifunction temperature module variants | Same | ~0.9 |
FAQ (10 Q&A)
-
Q: What role does the 176449‑02 front card play?
A: It processes inputs from displacement, velocity, and acceleration sensors—filtering and shaping signals to detect vibration, motion, and structural behaviors. -
Q: And the 138708‑01 rear card?
A: It supplies isolated field wiring, alarm relay routing, and communicates data to the rack backplane—all while providing safety barrier protection. -
Q: Is the module serviceable while running?
A: Yes—it supports hot swapping of both front and rear cards without shutting down the machinery monitoring system. -
Q: What measurements can it capture?
A: It can monitor vibration, axial displacement, expansion, acceleration, velocity, and detect bearing issues via REBAM. -
Q: How accurate is its signal capture?
A: Accuracy is typically ±0.33 % of full scale, at worst ±1 %. -
Q: What filter types are available?
A: Programmable filters include low‑, high-, and band‑pass ranging 0.09 Hz–4 kHz, plus vector (1X/2X) and REBAM filters. -
Q: What outputs are available?
A: Outputs include buffered sensor outputs, dual 4–20 mA channels per input, alarm relays, and rack-based digital communication. -
Q: What environmental conditions can it handle?
A: The front card works from 0 °C to +65 °C; the rear card matches that while maintaining safety barrier integrity—designed for tough industrial and hazardous settings. -
Q: What are the physical size and weight?
A: Front card: about 241 × 24 × 242 mm, 0.9 kg; Rear card: about 241 × 24 × 163 mm, 0.46 kg. -
Q: How much power does it draw, and what supply?
A: Powered by the 24 V DC rack, it consumes approximately 7.7 W in normal operation.
Authenticity guarantee
All product specifications are original and authentic imported products. We have an annual sales volume of 300 million yuan, and we only produce original and authentic products. All customers who cooperate with us directly online can enjoy low discounts.
Free warehouse
We have a complete range of product models, 80% of conventional models are in stock, and we have established channels in Asia, Africa, North America, South America, and Europe, effectively shortening the order processing time and satisfying customers in a timely manner.
Technical Team
Fast delivery. Spot goods can be shipped on the same day, and the delivery time transaction is 20% faster than that of peers on average, with a delivery time accuracy rate of 99%.
Thoughtful after-sales service
24-hour after-sales service guarantee team, professional and standardized management service system.