GCM Electronics, Inc.

Versatile interfacing board that included: 12 unbuffered TTL digital I/O lines 8 unbuffered analog inputs (0-5v) 8-bit analog to digital converter LED status indicators Clock/calendar Buffered digital outputs (500 ma) TRIAC outputs, 400v 2 amp zero-crossing optically isolated (IOC 24-4 has 4 TRIAC outputs, IOC 24-12 has 12 TRIAC outputs) Regulated 5v power supply