I got a reply from the CS-Lab folks who continue to be helpful. You're right. With the opto 22 relays I have, it would be possible to use their +24V out to control the Opto relays, but the mounting board I have doesn't allow access to the appropriate pin. I have G1 modules and a PB16T mounting rack. Looking for an appropriate rack if one exists.
Thanks for your reply!
Bill