Bently Nevada 3500/50M-01-01 Tachometer Module High Accuracy Speed Monitor

Product Overview

Brand: Bently Nevada
Model: 3500/50M-01-01
Type: Tachometer Module
Origin: U.S.A

The 3500/50M module measures shaft speed and rotor events.
It supports dual transducer input.
It is used in turbine and compressor systems.

Configuration Breakdown

3500/50M-01-01
│
├─ 3500/50M → Speed Monitor Core
│             ├─ Dual input channels
│             ├─ RPM measurement
│             └─ Acceleration / Zero Speed logic
│
├─ -01 → I/O Module Type
│        └─ Internal terminations
│
└─ -01 → Approval Option
         └─ cNRTLus Class I Div 2

System Compatibility

• 3500/22M firmware Rev 1.70 or later
• 3500/01 config software V4.20+
• 3500/02 data software V2.52+
• 3500/03 display software V1.52+
• Module firmware Rev 5.30+
• Not compatible with 3500/20

Signal & Speed Performance

• Input range: +10 V to -24 V
• Max frequency: 20 kHz
• Max speed range: 99,999 rpm
• Events per revolution: 0.0039–255
• Acceleration accuracy: ±20 rpm/min
• Low speed detection: 1 rpm (probe)
• Mag pickup min freq: 3.3 Hz
• Input impedance: 20kΩ standard
• TMR impedance: 40kΩ
• Internal barrier: 7.15kΩ

RPM Accuracy

• <100 rpm: ±0.1 rpm
• 100–10,000 rpm: ±1 rpm
• Above 10,000 rpm: ±0.01%

Power & Electrical Data

• Power use: 5.8 W typical
• Transducer supply: 24 VDC
• Max 40 mA per channel
• Over-voltage internal limit
• Noise filtering built-in

Front Panel Status

• OK LED – normal operation
• TX/RX LED – rack communication
• Bypass LED – bypass mode active

Mechanical Data

• Main board: 241.3 × 24.4 × 241.8 mm
• Main weight: 0.82 kg
• I/O depth: 99.1 mm (non-barrier)
• Barrier depth: 163.1 mm
• Front slot: 1 full height
• Rear slot: 1 full height

Key Advantages

• High RPM precision
• Wide speed range
• Dual sensor support
• Fast response
• Strong rack integration
• Safe for hazardous area
• Long operating life

Warranty & Shipping

• 12 months warranty
• Full test before delivery
• Safe anti-static packing
• Ship via FedEx, UPS, DHL

Professional FAQ

• How do I select between probe and magnetic pickup?

Use probe for low speed.
Use magnetic pickup for high vibration area.
Check signal voltage first.

• What should I verify before adding to rack?

Check firmware version.
Confirm slot space.
Review software revision.

• Can this module detect reverse rotation?

It reads pulse events.
Direction logic depends on system setup.
Confirm configuration setting.

• How to improve measurement stability?

Use shield cable.
Keep cable short.
Avoid strong EMI sources.

• When do I need internal barrier version?

Use it in hazardous zones.
Follow plant safety rules.
Check area classification.

Contact Information

Email:
info@oiltechcontrols.com
WhatsApp:

+86 158 8020 0923

Original Source:

Market 01

Partner

Powergear X Automation Limited

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