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Chapter 1 General Information
1.1 Introduction
The PCM-3724 is a PC/104-standard DIO module which attaches to the
piggyback connector on your CPU card or PC/104 CPU module. The
PCM-3724's two Intel 8255 PPI compatible chips provide 48 bits of par-
allel digital input/output. Buffered inputs and outputs offer high driving
capacity.
The modules's 48 bits are divided into six 8-bit I/O ports: A0, B0, C0, A1,
B1 and C1. You can configure each port as either an input or output in
software. The module also offers two hardware interrupt lines to the PC.
The module offers two 50-pin OPTO-22 compatible connectors which
can connect to a PCLD-7216 SSR I/O module carrier board, PCLD-885
power relay output board, PCLD-785B 24/16-channel relay output board
or a PCLD-782B 24/16 channel opto-isolated DI board.
PCM-3724User Manual
2
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