Serial Ports and Cables
GFK-0356Q
Appendix A Serial Ports and Cables
A-11
A
DCD ( A )
DCD ( B )
RD ( A' )
RD ( B' )
SD ( A )
SD ( B )
RT
CTS ( A' )
CTS ( B' )
RTS ( A )
RTS ( B )
+5V
0V
SHLD
RS-232/RS-422
CONVERTER
(IC690ACC900)
2
3
10
11
12
13
9
15
8
6
14
5
7
1
POWER
SOURCE
FOR
CONVERTER
SD ( A )
SD ( B )
RD ( A' )
RD ( B' )
RD
RTS ( A )
RTS ( B )
CTS ( A' )
CTS ( B' )
+5V
0V
SHLD
ALSO IT IS RECOMMENDED TO MAKE ANY NECESSARY CONNECTIONS
INSIDE THE CABLE CONNECTOR TO BE MOUNTED ON THE PLC. IT IS
NOT RECOMMENDED TO USE TERMINAL STRIPS TO OTHER TYPES OF
CONNECTORS ALONG THE LENGTH OF THE TRANSMISSION LINE.
NOTE
WHEN WIRING RS-422 /485 MULTIDROP CABLES REFLECTIONS ON THE
TRANSMISSION LINE CAN BE REDUCED BY CONFIGURING THE CABLE IN A
DAISY
CHAIN FASHION AS SHOWN BELOW.
CONVERTER
MASTER
SLAVE STATION
LAST STATION
GROUND POTENTIAL: MULTIPLE UNITS, NOT CONNECTED TO THE SAME POWER SOURCE, MUST HAVE COMMON GROUND POTENTIALS OR GROUND ISOLATION FOR PROPER
OPERATION OF THIS SYSTEM.
TERMINATION RESISTANCE FOR THE RECEIVE DATA (RD) SIGNAL NEEDS TO BE CONNECTED ONLY ON UNITS AT THE END OF THE LINES. THIS TERMINATION IS MADE
ON THE SERIES 90 PLC PRODUCTS BY CONNECTING A JUMPER BETWEEN PIN 9 AND PIN 10 INSIDE THE 15-PIN D-SHELL WITH THE FOLLOWING EXCEPTION. FOR SERIES
90-70 PLCs, CATALOG NUMBERS IC697CPU731 AND IC697CPU771, THE TERMINATION FOR RD AT THE PLC IS IMPLEMENTED BY A JUMPER BETWEEN PIN 9 AND PIN 11.
25- PIN
MALE
25- PIN
FEMALE
2
3
4
5
8
20
7
PIN
TD
RD
RTS
CTS
DCD
DTR
GND
RS-232
PORT
WORKMASTER
15-PIN
FEMALE
RS-422
PORT
25-PIN
FEMALE
RS-232
PORT
IC690CBL705 OR EQUIVALENT
RS-232 SHIELDED PAIRS
PLC 15-PIN CONNECTOR
SERIES 90-30 LOCATED
ON POWER SUPPLY
SERIES 90-70 LOCATED
ON THE CPU BOARD
5V
0V
PIN
SERIES
90-70
CPU
RS-422
PORT
15- PIN
MALE
15- PIN
FEMALE
SLAVE
STATION
*
RD
TD
CTS
DTR
DCD
GND
SHLD
3
2
5
20
8
7
1
PIN
25- PIN
MALE
15- PIN
MALE
PIN
2
3
12
13
10
11
9
6
14
15
8
5
7
1
RS-422
MAKE CONNECTIONS
INSIDE D-CONNECTORS
TO OTHER PLC's
PIN
SERIES
90-30
PS
RS-422
PORT
LAST
STATION
*
SD ( A )
SD ( B )
RD ( A' )
RD ( B' )
RD
RTS ( A )
RTS ( B )
CTS ( A' )
CTS ( B' )
+5V
0V
SHLD
*
2
3
12
13
10
11
9
6
14
15
8
5
7
1
15- PIN
MALE
15- PIN
FEMALE
Figure A-7. Workmaster II/Series 90 PLC Multidrop Connection
Note
The cable connector for the Series 90-70 serial port must be a right angle
connector in order for the hinged door on the module to close properly. Refer to
Table A-
, “Connector/Cable Specification.”