Rockwell Automation Allen-Bradley Guardmaster 440R-S35011, Руководство пользователя

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8 Rockwell Automation Publication 440R-UM014D-EN-P - December 2019
Chapter 1 Overview
MSR55P safety relays can monitor external safety relays and contactors. By
monitoring the normally closed contacts, MSR55P safety relays help prevent
re-energization of its outputs if the safety relays or contactors have not de-
energized. If feedback monitoring is not required, the monitoring circuit must
be jumpered.
MSR55P safety relays perform internal tests on startup and during operation.
Some faults are reset automatically when the fault is cleared. Other faults are
reset manually, by a manually operated switch, or automatically by a jumper.
See Status Indicators and Diagnostics on page 25 and Troubleshooting on
page 33 for further details.
Table 2 lists the six catalog numbers that are available. The key differences are
the power supply to terminals A1/A2 and the setpoint voltage to determine
safe standstill speed as the motor spins to a stop.
In general, select models that have the lower standstill monitoring voltage
when induction motors are monitored. Servo motors, which have permanent
magnets, generally create high voltages at slower revolutions, therefore, the
higher standstill monitoring voltage is usually the preferred solution. You must
evaluate your application and apply the risk assessment process to determine
the proper relay for their specific application.
Table 2 - Model Selection
A1/A2 Supply Voltage
Standstill Monitoring
Voltage Range Typical Applications Cat. No.
24V DC 20…400 mV
Induction motors with
contactors
440R-S35011
115V AC 20…400 mV 440R-S35012
230V AC 20…400 mV 440R-S35013
24V DC 200 mV…4V
Induction and servo
(permanent magnet)
motors with variable
frequency and servo drives
440R-S35014
115V AC 200 mV…4V 440R-S35015
230V AC 200 mV…4V 440R-S35016