The Bently Nevada 3500/50M-01-00 is a 2-channel Tachometer Module from the 3500 Machinery Protection System, designed to measure shaft rotational speed, rotor acceleration, and rotor direction. The module also supplies conditioned Keyphasor® signals to the 3500 rack backplane, eliminating the need for a separate Keyphasor module in many configurations.
Item No :
3500/50M-01-00Order(MOQ) :
1 PiecePayment :
EXWProduct Origin :
USAShipping Port :
WuhanLead Time :
3~5 daysWeight :
3kg| Specification | Description |
|---|---|
| Manufacturer | Bently Nevada (Baker Hughes) |
| Model | 3500/50M-01-00 |
| Main Board Part Number | 3500/50M-01-00 |
| I/O Module Part Number | 133442-01 (Internal Terminations) |
| Product Family | 3500 Machinery Protection System |
| Product Type | Tachometer Module (2-Channel) |
| Input Channels | 2 independent channels |
| Input Signal Range | +10.0 V to -24.0 V |
| Input Impedance | 20 kΩ (Standard); 40 kΩ (TMR); 7.15 kΩ (Internal Barrier) |
| Input Sources | Proximity probes or magnetic pickups |
| Maximum Full Scale Range | 99,999 rpm |
| Maximum Input Frequency | 20 kHz |
| RPM Accuracy | <100 rpm: ±0.1 rpm; 100–10,000 rpm: ±1 rpm; 10,000–99,999 rpm: ±0.01% of true speed |
| Recorder Output | +4 to +20 mA per channel, proportional to full scale |
| Recorder Load | 0 to 600 Ω |
| Recorder Update Rate | 100 ms |
| Transducer Power Supply | 24 Vdc, 40 mA max per channel |
| Power Consumption | 5.8 W typical |
| Configuration Options | Speed monitoring, setpoint alarms, speed band alarms, zero speed notification, rotor acceleration alarms, reverse rotation notification |
| Peak Hold Feature | Stores highest speed, highest reverse speed, or reverse rotation count |
| Rack Position | 1 full-height front slot + 1 full-height rear I/O slot |
| Operating Temperature | -30°C to +65°C |
| Storage Temperature | -40°C to +85°C |
| Weight (Total Assembly) | Approx. 1.02 kg |
| Country of Origin | USA |
Part Number Breakdown (3500/50M-01-00):
| Segment | Value | Meaning |
|---|---|---|
| 3500/50M | Base model | Tachometer Module (M-series, enhanced) |
| -01 | I/O Module Type | I/O Module with Internal Terminations |
| -00 | Agency Approval | No hazardous area approvals required |
Kit Contents: Main board (288062-02) + Internal Termination I/O Module (133442-01)
| Model | Description | Typical Application |
|---|---|---|
| 3500/50M-01-00 (this model) | 2-channel Tachometer Module, internal terminations, no approvals | Standard speed monitoring with internal wiring |
| 3500/50M-01-01 | Same with cNRTLus approval (Class 1, Div 2) | North American hazardous area installations |
| 3500/50M-02-00 | External terminations version | Applications requiring remote termination |
| 3500/53 | Overspeed Protection Module | Dedicated overspeed trip – required for ETS applications |
| 133442-01 | I/O Module with Internal Terminations (spare) | Replacement I/O module |
| 288062-02 | Tachometer Module Main Board (spare) | Replacement main board |
| 3500/25 | Enhanced Keyphasor Module | Dedicated Keyphasor signal processing (when not using 50M Keyphasor output) |
| 3500/40M | Proximitor/Seismic Monitor | Vibration monitoring companion in 3500 rack |
Q1: What is the primary function of the 3500/50M-01-00?
It is a 2-channel Tachometer Module that measures shaft rotational speed, rotor acceleration, and rotor direction from proximity probes or magnetic pickups. It compares measurements against user-programmable alarm setpoints and can supply conditioned Keyphasor signals to the 3500 rack backplane .
Q2: Can the 3500/50M be used for overspeed protection?
No. Bently Nevada explicitly warns that the 3500/50M must not be used as a component of a speed control or overspeed protection system. It lacks the redundancy and response speed required for safety-critical overspeed trips. For overspeed protection, the 3500/53 module or 141539-01 Overspeed Protection System is required .
Q3: What does the "-01" and "-00" suffix mean?
The -01 indicates I/O Module with Internal Terminations (field wiring connects inside the rack via the 133442-01 I/O module) . The -00 indicates no hazardous area agency approvals are included . For hazardous area installations, use -01 or -02 approval suffix .
Q4: What configuration options are available?
The module supports: Speed Monitoring with Setpoint Alarming, Speed Band Alarming, Zero Speed Notification, Rotor Acceleration Alarming, and Reverse Rotation Notification . Configuration is performed using the 3500 Rack Configuration software.
Q5: What is the difference between the 3500/50 and 3500/50M?
The "M" designation indicates M-series (enhanced) capabilities, including better integration with Bently Nevada's System 1 diagnostic platform and improved internal processing for higher frequency inputs . The standard 3500/50 lacks these enhanced features.
The Bently Nevada 330105-02-12-05-02-00 is an 8 mm reverse-mount proximity probe from the 3300 XL series, engineered for non-contact vibration and position monitoring in space-constrained machinery.
The Bently Nevada 330130-085-00-00 is an 8.5-meter standard extension cable for the 3300 XL 8 mm Proximity Transducer System. It connects a 3300 XL proximity probe to its Proximitor® sensor, transmitting eddy-current displacement signals for vibration, axial position, and Keyphasor measurements on critical rotating machinery.
The Bently Nevada 21000-00-00-15-030-04-00 is a Proximity Probe Housing Assembly from the 21000 series, designed to provide a secure, environmentally sealed mounting interface for reverse-mount proximity probes on critical rotating machinery.
The Bently Nevada 330780-50-00 is a 5.0-meter Proximitor® Sensor for the 3300 XL 11 mm Proximity Transducer System. It receives signals from a 3300 XL 11 mm probe and its extension cable, conditioning them into a linear voltage output proportional to shaft displacement for radial vibration, axial thrust position, and Keyphasor measurement.
The Bently Nevada 21747-040-00 is a 4-meter Proximitor probe extension cable designed for the 3300 and 7200 Series Proximity Transducer Systems. It connects a proximity probe to its Proximitor sensor, transmitting high-frequency eddy-current displacement signals for vibration and shaft position monitoring on critical rotating machinery.
The Bently Nevada 330710-00-060-10-02-00 is a 3300 XL 11 mm Proximity Probe designed for non-contact vibration and position measurement on large, fluid-film bearing machinery. Its 11 mm tip provides a longer linear range compared to the standard 8 mm system, making it ideal for applications requiring greater measurement span, such as axial thrust position, differential expansion, and radial vibration on steam turbines, centrifugal compressors, and large pumps.
The Bently Nevada 330103-00-11-50-02-00 is a 3300 XL 8 mm proximity probe with a metric M10×1 thread and a 5.0-meter integral cable terminated with a miniature coaxial ClickLoc™ connector. This extended-reach configuration features a 110 mm overall case length and connects directly to a Proximitor® sensor without requiring an extension cable for short-run installations.
The Bently Nevada 990-10-XX-01-00 (MOD 165353-01) is a two-wire, loop-powered Vibration Transmitter designed for OEMs of centrifugal air compressors, small pumps, motors, and fans. It accepts input from a 3300 NSv proximity probe and its matching extension cable, conditioning the signal into a 4–20 mA output proportional to peak-to-peak vibration amplitude.
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