R221A08 FAQ
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Thank you for sending me a copy of the manual for the R221A08 8-channel RS232 Relay Board.
Would you please describe the operation of the “Interlock” function? I can not figure that out.
Also, the manual describes ASCII commands. I have not been able to make these work. Are these available for the R221A08? I can make the hex format commands work. But I do not find a “All Open” or “All Close” command in the hex format. Are these valid commands?
Answer :
1. The R221A08 does not support ASCII commands. 2. It lacks "All Open" or "All Close" commands. 3. "Interlock" means that only one relay can be opened at a time.