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Rockwell Automation Publication 8720MC-RM001K-EN-P - September 2018
Chapter 5
Connect the 8720MC-RPS Unit
Operation Timing of
Sequence Control Signals
The following timing diagrams describe the sequence of operations for
precharge, discharge, error detection, error resetting, and power loss.
Figure 33 - Sequence Operation of Precharging
Figure 34 - Sequence Operation of Discharging
PWR Input
RST Input
RDY Output
FR Output
IP Output
On
Off
On
Off
Open
Close
Open
Close
Open
DC Bus Voltage
Main Magnetic
Contactor (MC)
On
Off
Close
DC Bus Voltage
Main Magnetic
Contactor (MC)
PWR Input
RST Input
RDY Output
FR Output
IP Output
On
Off
On
Off
On
Off
Open
Close
Open
Close
Open
Close