Nv3Q - Omron NV Series Setup Manual

Communications/Power Connector Pin Assignments
4-3-4

NV3Q

24V COM.(RS232C)
24V COM.(RS422)
Note
66
■
Using a 24-V Input and RS-232C Communications (NV3Q-MR21 and
NV3Q-SW21)
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 (NV3Q-MR41
and NV3Q-SW41)
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