Nv4W - Omron NV Series Setup Manual

Communications/Power Connector Pin Assignments
4-3-3

NV4W

+SD
-SD
+RD
-RD
E
Note
■
Using a 24-V Input and RS-232C Communications (NV4W-MG21 and
NV4W-MR21)
Pin number Signal name
1 +24 V
2 0 V
3 Functional ground
4 Send data
5 Receive data
6 Request to send
7 Clear to send
8 Signal ground
■
Using a 24-V Input and RS-422A or RS-485 Communications (NV4W-MG41
and NV4W-MR41)
Pin number Signal name
1 +24 V
2 0 V
3 Functional ground
4 Send data
5 Send data
6 Receive data
7 Receive data
8 Terminating resistance
(1) The RS and CS control lines are not used.
(2) Pin E is used to set the terminating resistance.
Symbol Signal direction
+ ---
−
---
FG ---
SD PT to external device
RD External device to PT
RS PT to external device
CS External device to PT
SG ---
Symbol Signal direction
+ ---
−
---
FG ---
+SD PT to external device
−SD
PT to external device
+RD External device to PT
−RD
External device to PT
E ---
Section 4-3
65