10-10
Series 90-30 PLC Installation and Hardware Manual
–
August 2002
GFK-0356Q
10
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 II
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 PLCs
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 10-3. Example of Multidrop Configuration with Converter
The following figure is an example of the wiring configuration required when a Work Station
Interface board is installed in the computer. The 15-pin serial port connector for the 90-30 PLC is
on the power supply; the 37-pin serial port connector for Workmaster II and Workmaster
computers is on the Work Station Interface board in the programming computer. The cable type
for these connections should be 24 AWG (.22 mm
2
), 30V computer grade. Extra flexible
construction is recommended for short lengths.