The RTC-BUF50 is a TTL-level digital input/output expansion board with 48 TTL-level I/O lines that are selected as six 8-bit I/O ports. These six ports may be configured as any combination of inputs and outputs. Two industry-standard 50-pin ribbon cable headers provide external connections to typical Opto-22-type expansion interface boards such as the IDI24 (optoisolated DC input) and IDO24 (contact-closure relay output).

Features	48 bits, TTL I/O		Size:	3.5" x 3.8"
Power (fully loaded):	+5 V @ 100 mA		Industrial Temp. Available:	Yes
Comments: Each PIO (2) has 50-pin ind. Std. Connector for opto-controlled racks, connects to IDI24 and IDO24 boards