Shaft Speed Switches

Shaft Speed Switches Selector Guide

Speed Switch Features

• Under speed, over speed, zero speed or reverse detection
• Rugged, Reliable Speed Switches for Hazardous Areas
• Output Options
   - Relay Output
   - 4-20 mA Analog Output
   - DeviceNet
   - AS-Interface
• Simple Installation and Calibration

• Analog or Digital Electronics
• Single or Multiple Setpoints
• Failsafe Operation
• Integrated or Discrete Sensor
• Start Delay

• Explosion Proof or Enclosure Install
• Input Power (DC, AC)
• Water Resistant and Explosion Proof Models

Speed Switch Overview

A speed switch senses rotating shaft speed, comparing it to one or more settable over/under/zero speed alarm trip-points. A shaft speed sensor detects magnets embedded in a shaft-mounted pulser wrap/disc. As the shaft rotates, the passing magnets are detected across an air-gap as pulses with frequency proportional to shaft RPM. When the pulse frequency (shaft RPM) crosses to the alarm side of a trip-point threshold, a corresponding relay de-energizes, indicating the alarm.  

Standard Speed Switch System Configurations

3-Piece System
Shaft Speed Switch + Shaft Speed Sensor + Shaft Speed Pulse Generator

2-Piece System
Shaft Speed Switch with Integrated Shaft Speed Sensor + Shaft Speed Pulse Generator


DR1000

Shaft speed switch with DPDT output relay to detect shaft slowdown or stoppage. Housed in an explosion proof and waterproof cast aluminum enclosure.

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FB420

SPDT output relay and 4-20 mA output speed sensor and speed switch, housed in a explosion proof and NEMA 4X enclosure. Relay can be set for overspeed or underspeed. 24 VDC.

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LRB1000 / LRB2000

Speed Switch with one or two adjustable SPDT setpoint relays to detect over-speed, under-speed, or stoppage. Built-in start delay and signal loss protection. Housed in a NEMA 1 enclosure.

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M100/5000 & PVC100/5000

Self-contained sensor and speed switch for detecting shaft slowdown, SPDT relay output, housed in an explosion proof cast aluminum or a corrosion-resistant PVC enclosure.

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M100T / M5000T

Self-contained sensor and speed switch for detecting shaft slowdown, SPDT output relay, housed in a cast aluminum explosion proof enclosure.

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OEM Switch DMS100/5000

The DMS speed switch is an economical choice housed in a compact plastic enclosure, it mounts on a standard 35 mm DIN rail and operates on 115/230 VAC with optional DC units available.

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SCP1000 / SCP2000

Self-contained, presettable sensor and speed switch with one or two adjustable SPDT or DPDT setpoint relays to detect over-speed or under-speed. Built-in start delay. Housed in a cast aluminum explosion proof enclosure.

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SpeedTalker-DN(BH) DeviceNet

Shaft Speed Sensor with Alarms (Shaft Speed Switch) and DeviceNet network interface

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SpeedTalker-DN(UI)

Universal-Input Shaft Speed measurement with alarms (Shaft Speed Switch) and DeviceNet network interface

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SpeedTalker-DN(XP) DeviceNet

Shaft Speed Sensor with Alarms (Shaft Speed Switch) and DeviceNet network interface

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SS110

One adjustable SPDT output relay for detecting shaft speed in super slow speed applications. Built-in start delay. Housed in a NEMA 1 enclosure.

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UDS1000

Reverse shaft rotation detector with DPDT output relay. Automatically resets when reverse motion stops. Housed in a cast aluminum explosion proof enclosure.

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