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CHAPTER 2: Interconnections
2.0) Introduction
The PC 62C 16 Digital I/O board plugs into any ISA expansion slot at the gold finger
edge connectors J1/J2 and J3/J4. The board communicates to the user circuit via IDE
connectors mounted on the PC board. This chapter describes these connectors.
2.1) Connections to the IBM AT Bus
The PC 62C board may be plugged into any 16 bit slot of the AT computer’s backplane.
All data transfers to and from the host computer are channelled via these connectors.
2.2) PC 62C DB37 User Connector (P1)
The PC 62C optically isolated inputs interfaces to the external world via a D-Type 37 way
male connector.
Figure 4 graphically shows the connector together with their pin assignments. Note that
the pin connections refer to the pin numbers of the connector when looking into the
COMA
COMB
Figure 2.2: PC 62C Interface Connector (as seen from the rear of the PC)