Rockwell Automation Publication 440R-UM013E-EN-P - March 2017 35
Chapter 4
Configuration
The multi-position, rotary switches on the front face of a GSR relay determine
its functionality. The configuration method of a GSR relay must provide
means to help protect against manipulation and maintain integrity of the
configuration.
The rotary switches accommodate a small screwdriver to turn the switch to the
desired switch position. The configuration procedure implies a willing action
by the person that configures the safety function, to prove that the person is
conscious and enabled to perform this task. Therefore, GSR relays require a
procedure of turning a switch to position “0” to start the configuration mode
and then turn to the position desired.
The status indicators on the front panel provide continuous feedback by
flashing the switch positions. Power cycling the device in a timely manner
completes the configuration mode and the device enters operation.
We recommend that the configuration is completed within 5 minutes. The
actual technical limitation of the internal EEPROM is around 8 hours. The
switch positions are monitored and verified during configuration by the
internal micro-controllers to achieve the required diagnostics coverage for the
PLe safety rating. The EEPROM read/write cycles are limited and can cause a
permanent fault of the GSR relay after several hours.
IMPORTANT To keep your GSR relay from permanently faulting, complete the
configuration process by power cycling the relay within 5 minutes after
configuring rotary switches.
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