MSR55P Back EMF Minotaur Safety Relay User Manual

2022-05-26
●This manual is a reference guide for MSR safety relays. It describes the procedures that you use to install, wire, and troubleshoot your relay. This manual explains how to install and wire your relay and gives an overview of the operation of the MSR safety relays.
●Use this manual if you design, install, program, or troubleshoot control systems that use the MSR safety relays.
●You must have a basic understanding of electrical circuitry and familiarity with safety-related control systems. If you do not, obtain the proper training before using this product.
●Safety Relay Features
■MSR55P back electro-motive-force (EMF) safety relays monitor the voltage that motors generate after their drive voltage is removed and the motor coasts or brakes to a stop. MSR55P safety relays monitor either single- or three-phase motors. MSR55P safety relays operate with pulse width modulated (PWM) drives, smart motor controllers, and electromechanical contactors.
■MSR55P safety relays are connected to the motor terminals and measure the induced back EMF as the motor spins to a stop. MSR55P safety relays create a two-channel system by measuring the voltage from L2 to L1 and the voltage from L3 to L1. If the back EMF voltage drops to a certain threshold simultaneously in both channels for a certain duration, standstill is considered achieved, and the outputs are energized.
■If the voltage measured on terminals L1/L2/L3 of the MSR55P safety relay rises over the adjusted value plus hysteresis in at least one channel (the motor is switched on or the shaft turns mechanically), the forcibly guided output contacts are switched off immediately (contacts 23/24, 33/34 and 43/44 open while contact 11/12 closes). The monitoring relay de-energizes (53/54 opened), the semiconductor output ON goes off and the OUT indicator turns yellow (= V-m over adjusted value).

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440R-S35011440R-S35012440R-S35013440R-S35014440R-S35015440R-S35016MSR55P

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Back EMF Minotaur Safety Relay

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User's Guide

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English Chinese Chinese and English Japanese

December 2020

440R-UM014G-EN-P

2.9 MB

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