Omron NS7 Series User Manual

Appendix 4 Using NS-AL002 RS-232C/RS-422A Converters
A-16
@ RS-422A Terminal Block
Terminal block
pin number
Signal name
Signal direction
Adapter Û Host
1 FG Connects to functional ground terminal of PT.
2 RDB (+) ¬
3 SDB (+) ®
4 RSB (+) ®
5 NC ---
6 RDA (-) ¬
7 SDA (-) ®
8 RSA (-) ®
@ Crimp Terminals
Use M3 crimp terminals.
Applicable Crimp Terminal Examples
Forked type Round type
Manufac-
turer
Model
Recommended
cable size
Manufac-
turer
Model
Recommended
cable size
J.S.T. Mfg.
Co., Ltd.
V1.25-N3A AWG22 to 16
(0.25 to 1.65 mm
2
)
J.S.T. Mfg.
Co., Ltd.
V1.25-MS3 AWG22 to 16
(0.25 to 1.65 mm
2
)
Molex VSY1.25-3.5L AWG22 to 16
(0.3 to 1.65 mm
2
)
Molex RAV1.25-3 AWG22 to 16
(0.3 to 1.65 mm
2
)
Recommended Cable
Manufac-
turer
Model
Tachii Elec-
tric Wire Co.,
Ltd.
TKV VBS4P-03
A-4-6 Preparing Shield of RS-422A/485 Cables
For RS-422A/485 long-distance transmission, if both ends of the shield are grounded, a
large current may flow to the shield due to the difference in ground potential. Therefore,
ground the shields on one end of the cable only.
Forked type Round type
6.2 mm max. 6.2 mm max.
Host
Signal line
RS-422/485 shield
NS-AL002
NS-AL002
NS-AL002
PT
PT
PT
Connect to FG on
terminal block.

Omron NS7 Series Specifications

General

Brand	Omron
Model	NS7 Series
Category	Touch terminals
Language	English