Register-Based Programming 93Appendix B
A switch is open when contact is made between the normally closed (NC)
contact and common (C). A switch is closed when contact is made between
the normally open (NO) contact and common (C). Any combination of o pen
or closed states is allowed at one time for all channels on the module.
Write a "1" to the register bit to close the relay
Write a "0" to the register bit to open the relay
NO
NC
COM Relay position
after "CLOSE" command
after "OPEN" command
Relay position
COM NC
NO