GTCO CR 1212 - Users Guide User Manual
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CR 1212 10
Chapter 3: Interfacing with the Host
For successful communication between the CR 1212 and its host, they must have the same
hardware interface, baud rate, communications protocol and report format.
Section A: Hardware Interface
The hardware interface for the CR 1212 is an RS-232C with a 25-pin D connector. The pin
assignments are listed below.
RS-232C Interface: 25-Pin D Connector Pin Assignments
The computer must have an RS-232C communications port terminated with a 25-pin male
D connector that is configured as DTE (Data Terminal Equipment).
NOTE: If the computer has a different connector, contact your GTCO CalComp by Turning
Technologies representative for information about adapter cables.
The CR 1212 complies with standard signal levels for data transmission: