Proface APL3000B - Node Box PC User Manual
Page 52
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Chapter 3 Specifications
3-11
RS-422
RS-485
Pin Arrangement
Pin No.
RS-422
Signal Name
Direction
Description
1
RDA
Input
Receive Data A(+)
2
RDB
Input
Receive Data B(-)
3
SDA
Output
Send Data A(+)
4
ERA
Output
Data Terminal Ready A(+)
5
SG
-
Signal Ground
6
CSB
Input
Clear to Send B(-)
7
SDB
Output
Send Data B(-)
8
CSA
Input
Clear to Send A(+)
9
ERB
Output
Data Terminal Ready B(-)
Shell
FG
-
Frame Ground
(Common with SG)
Pin Arrangement
Pin No.
RS-485
Signal Name
Direction
Description
1
DATA+
Input/Output
Send/Receive Data (+)
2
DATA-
Input/Output
Send/Receive Data (+)
3
NC
-
No Connection
4
NC
-
No Connection
5
SG
-
Signal Ground
6
NC
-
No Connection
7
NC
-
No Connection
8
NC
-
No Connection
9
NC
-
No Connection
Shell
FG
-
Frame Ground
(Common with SG)
(PL unit side)
9
6
5
1
(PL unit side)
9
6
5
1
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