D-2
Series 90-30 PLC Installation and Hardware Manual
–
August 2002
GFK-0356Q
D
Pin Assignments
The pinouts of the Miniconverter are shown in the following two tables. The first table shows the
pinout for the RS-232 port, the second table shows the RS-422 port.
Pin Assignments, RS-232 Port
Table D-1 is for the RS-232 port. The direction of signal flow is with respect to the Miniconverter.
Table D-1. Miniconverter RS-232 Port
Pin
Signal Name
Direction
2
SD – Send Data
Output
3
RD – Receive Data
Input
5
GND – Ground
n/a
7
CTS – Clear To Send
Input
8
RTS – Request To Send
Output
The pinouts were chosen to allow direct connection (using a straight through, or 1 to 1 cable (as
provided with kit)) to the IBM PC-AT. Most IBM compatible computers equipped with an RS-232
port will provide a pinout compatible with the one shown above.
Pin Assignments, RS-422 Port
Table D-2 is the pinout for the Miniconverter’s RS-422 serial port. The direction of signal flow is
also with respect to the Miniconverter.
Table D-2. Miniconverter RS-422 Port
Pin
Signal Name
Direction
1
SHLD - Shield
n/a
5
+5 VDC - Power
Input
6
CTS(A’) - Clear To Send
Input
7
GND - Ground
n/a
8
RTS(B) - Request To Send
Output
9
RT - Receive Termination
Output
10
SD(A) - Send Data
Output
11
SD(B) - Send Data
Output
12
RD(A’) - Receive Data
Input
13
RD(B’) - Receive Data
Input
14
CTS(B’) Clear To Send
Input
15
RTS(A) - Request To Send
Output
