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Vibration Switches

Vibration Switches

Vibration Switches

Product catalog summary
Introduction to Vibration Switches
A vibration switch is a device that detects the amplitude of vibration and responds when it exceeds a set threshold, typically by closing or opening an electrical contact. These switches are crucial for protecting machinery from damage due to excessive vibration or alerting when there is a lack of expected vibration.

Applications
Vibration switches are used in various applications including cooling tower fans, gearboxes, fin fans, HVAC systems, blowers, motors, pumps, and for 24/7 machinery protection.

Types of Vibration Switches
  • Electronic Vibration Switch - Series 685B: Features include dual set points with alert and alarm relays, 4-20 mA output for monitoring, and explosion-proof models. It requires power and uses an electronic vibration sensor.
  • Smart Vibration Switch - Series 686C: USB programmable, it offers solid-state reliability, two-wire operation, and features like Remote Reset Anywhere™ and MAVT™ for automatic alarm threshold setting.
  • Mechanical Vibration Switch - Series 685A: A cost-effective solution for less critical applications, it uses a spring-loaded, magnetically coupled sensor and requires no power.


Specifications
  • Series 685B: Measurement range up to 50 mils, frequency range 2 to 1000 Hz, power 85 to 245 VAC or 24 VDC, and NEMA 4X enclosure rating.
  • Series 686C: Measurement range 0.25 to 4.0 in/sec, frequency range 2 to 1000 Hz, power 24 to 240 V AC/DC, and stainless steel housing.
  • Series 685A: Measurement range 7 g pk, frequency range 0 to 100 Hz, and aluminum alloy housing.


Conclusion
Vibration switches are essential for monitoring and protecting machinery by detecting abnormal vibration levels. The choice between electronic, smart, and mechanical switches depends on the specific application requirements, such as precision, cost, and environmental conditions.
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Catalog excerpts

Vibration Switches-1

®IMI SENSORS A PCB DIVISION

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Vibration Switches-2

VIBRATION SWITCHES ■ Motors WHAT IS A VIBRATION SWITCH? A vibration switch is a device that (1) recognizes the amplitude of the vibration to which it is exposed and (2) provides some sort of response when this amplitude exceeds a predetermined threshold value. The switch response is typically an electrical contact closure or contact opening. The electrical contact may be either an electromechanical relay or solid-state triac. Vibration switches are primarily used for protecting critical machinery from costly destructive failure by initiating an alarm or shutdown when excessive vibration of the...

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Vibration Switches-3

ELECTRONIC VIBRATION SWITCH - SERIES 685BPRODUCT HIGHLIGHTS: ■ Offers two set points with individual alert and alarm relays ■ 4-20 mA output signal for vibration monitoring ■ Analog, 100 mV/g output signal for fault diagnostics ■ Utilizes built-in or remote vibration sensor ■ Adjustable time delays for alert or alarm ■ Accepts 4-20 mA calibrator input signal for accurate threshold value set-up ■ Explosion proof models available* Electronic switches require power to operate and utilize an input signal that is provided by an electronic vibration sensor, or accelerometer. This sensor may be built...

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Vibration Switches-4

PRODUCT HIGHLIGHTS: USB PROGRAMMABLE SETTINGS INCLUDE: ■ Fully USB programmable for consistent results ■ Alarm threshold level & hysteresis ■ Solid state relay for reliable operation ■ Power-on, startup, & operating delays ■ 2-wire operation uses existing mechanical switch wires ■ Eliminates false trips with programmable delays ■ Remote Reset Anywhere"™ for safety and convenience ■ Exclusive MAVT™ sets alarm threshold automatically ■ Hazardous area approvals available* The Smart Vibration Switch is highly versatile, fully user programmable via USB, low cost, and a drop-in replacement for most...

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Vibration Switches-5

MECHANICAL VIBRATION SWITCH - SERIES 685APRODUCT HIGHLIGHTS: ■ Unique patent pending, spring-loaded, magnetically coupled sensor, requiring no power ■ Offers cost effective protection for less critical situations ■ 2-wire operation uses existing mechanical switch wires ■ Provides better control over trip sensitivity ■ Remote reset models available For machines requiring simplified contact closure protection, 685A series offers a cost-effective approach to vibration protection. They offer the smallest mechanical switch footprint available in either NEMA 4 or explosion proof housings. The three...

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Vibration Switches-6

3425 Walden Avenue, Depew, NY 14043 USA pcb.com/imi-sensors | © 2022 PCB Piezotronics - all rights reserved. PCB Piezotronics is a wholly-owned subsidiary of Amphenol Corporation. Endevco is an assumed name of PCB Piezotronics of North Carolina, Inc., which is a wholly-owned subsidiary of PCB Piezotronics, Inc. Accumetrics, Inc. and The Modal Shop, Inc. are wholly-owned subsidiaries of PCB Piezotronics, Inc. IMI Sensors and Larson Davis are Divisions of PCB Piezotronics, Inc. Except for any third party marks for which attribution is provided herein, the company names and product names used in...

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