5-22
Series 90-30 PLC Installation and Hardware Manual
–
August 2002
GFK-0356Q
5
Pin Assignments for CPU351, CPU352, and CPU363 Serial Ports 1 & 2
The following two tables describe the pin assignments for each of the two front panel serial ports
on the CPU351, CPU352, and CPU363.
Table 5-6. Port 1 (RS-232)
Pin
Number
Signal
Name
Description
1
CTS
Clear To Send
2
TXD
Transmit Data
3
0V
Signal Ground
4
0V
Signal Ground
5
RXD
Receive Data
6
RTS
Request to Send
Table 5-7. Port 2 (RS-485)
Pin
Number
Signal
Name
Description
1
Shield
Cable Shield
2
NC
No Connection
3
NC
No Connection
4
NC
No Connection
5
+5VDC
Logic Power *
6
RTS(A)
Differential Request to Send
7
SG
Signal Ground
8
CTS(B‘)
Differential Clear To Send
9
RT
Resistor Termination
10
RD(A‘)
Differential Receive Data
11
RD(B‘)
Differential Receive Data
12
SD(A)
Differential Send Data
13
SD(B)
Differential Send Data
14
RTS(B’)
Differential Request To Send
15
CTS(A’)
Differential Clear To Send
*
Note that Pin 5 provides Is5 VDC power (100 mA maximum) for
powering external options.