14
25
13
1
SIO
This serial port is used for the GLC's RS-232C and RS-422 interface
cables.
Recommended Connector : Dsub 25 pin plug XM2A-2501 <made by OMRON Corp.>
Recommended Cover :
Dsub 25 pin Cover XM2S-2511 <made by OMRON Corp.>
Jack Screw
XM2Z-0071 <made by OMRON Corp.>
Recommended Cable :
CO-MA-VV-SB5P X 28AWG <made by HITACHI Cable Ltd.>
• When creating a cable, please be aware of the following:
<For RS-422 Connections>
• The following pairs of pin #’s must be connected to each other
...#18 (CSB) <-> #19 (ERB)
...#21 (CSA) <-> #22 (ERA)
• When connecting the RS-422 cable and the #9 (TRMX) and
#10 (RDA) points, a termination resistance of 100
Ω
is added
between RDA and RDB.
• When the GLC is set as a Memory Link type and the cable type
is RS-422, a 4-line system must be used.
<For RS-232C connections>
• Do not connect #9 (TRMX), #10 (RDA), #11 (SDA), #15 (SDB),
#16 (RDB), #18 (CSB), #19 (ERB), #21 (CSA), and #22 (ERA).
Pin
#
Signal
Name
Condition
Pin
#
Signal
Name
Condition
1
FG
Frame ground
14
VCC
5V
±
5% output
0.25A
2
SD
Send data
(RS-232C)
15
SDB
Send data B
(RS-422)
3
RD
Receive data
(RS-232C)
16
RDB
Receive data B
(RS-422)
4
RS
Request send
(RS-232C)
17
NC
No connection
5
CS
Clear send
(RS-232C)
18
CSB
Clear send B
(RS-422)
6
NC
No connection
19
ERB
Enable receive B
(RS-422)
7
GND
Signal ground
20
ER
Enable receive
(RS-232C)
8
CD
Carrier detect
(RS-232C)
21
CSA
Clear send A
(RS-422)
9
TRMX
Termination
(RS-422)
22
ERA
Enable receive A
(RS-422)
10
RDA
Receive data A
(RS-422)
23
RESERVED
Reserved for future
use
11
SDA
Send data A
(RS-422)
24
NC
No connection
12
NC
No connection
25
RESERVED
Reserved for future
use
13
NC
No connection
ALRM OUT
ALRM GND
Extemal AlarmOutput
Extemal AlarmGround
BUZZER OUT
BUZZER GND
Extemal Buzzer Output
Extemal Buzzer Ground
13
3
Serial Interface
