GTCO Summagrid IV - Users Guide Part 3 - Manual (Page 2)

Summagrid IV 2
A.1 Summagrid IV Interfacing Hardware
A.1.1 RS-232 Hardware Interface
The Summagrid III’s interfacing hardware complies with the EIA (Electronic
Industries Association) RS-232C standard. The interface is bidirectional,
asynchronous and serial. It is capable of communicating in full duplex and uses the
ASCII seven-bit data code.
A.1.2 Cable Diagrams
Below are cable diagrams for the Summagrid IV cables: PC interface cable and 9-pin-
to-25 pin AT adapter cable.
PC Interface Cable