I tested my EZIO8SA with a Xantach Model 781ERGPS which supplies 12V DC @ 500 mA. All 8 relays energized. There is a known problem with relays 7 & 8 being reversed. Relay 8 turns On in response to a relay 7 On command and Relay 7 turns On in response to a relay 8 command to turn On. The workaround is to reverse the relay 7 & 8 connections.
I’m a little surprised the 9V DC 800 mA supply did not work. How are the relay responses being verified?