ULDO1CO - Digital Output Relay Interface Module 1CO plain (Non-redundant)
ULDO1COF - Digital Output Relay Interface Module 1CO with fuse & option of fuse fail indication (Non-redundant)
ULDO2CO - Digital Output Relay Interface Module 2CO plain (Non-redundant)
ULDO2COF - Digital Output Relay Interface Module 2CO with fuse & fuse fail indication
ULDO1/2COWF - Digital Output Relay Interface Module 1CO/2CO wetted (powered contacts) with fuse & fuse fail indication
ULDO1/2/4CORED - Digital Output Relay Interface Module 1CO/2CO/4CO Contact (Redundant)