![background image](http://html.mh-extra.com/html/omron/nt21/nt21_setup-manual_744541104.webp)
5-1
Section
Connecting to the Host’s RS-422A/485 Port
93
Connecting the Link Adapter to the Host (RS-485)
NT21
Host
RS-485
(Total length
500 m max.)
Link Adapter
(NT-AL001 or
NS-AL002)
Wiring to one of the following Serial Communications Boards/Units
•
CS-series CS1G/H(-H) Serial Communications Board
•
CJ-series CJ1G Serial Communications Unit
•
C-series C200HX/HG/HE(-Z)E Serial Communications Board
•
CQM1H Serial Communications Board
Applicable Units:
CS1G-CPU42-E(V1)
CS1G-CPU43-E(V1)
CS1G-CPU44-E(V1)
CS1G-CPU45-E(V1)
CS1H-CPU63-E(V1)
CS1H-CPU64-E(V1)
CS1H-CPU65-E(V1)
CS1H-CPU66-E(V1)
CS1H-CPU67-E(V1)
CS1G-CPU42H
CS1G-CPU43H
CS1G-CPU44H
CS1G-CPU45H
CS1H-CPU63H
CS1H-CPU64H
CS1H-CPU65H
CS1H-CPU66H
CS1H-CPU67H
CJ1W-SCU41 (communication port 1)
C200HE-CPU32-(Z)E
C200HE-CPU42-(Z)E
C200HG-CPU33-(Z)E
C200HG-CPU43-(Z)E
C200HG-CPU53-(Z)E
C200HG-CPU63-(Z)E
C200HX-CPU34-(Z)E
C200HX-CPU44-(Z)E
C200HX-CPU54-(Z)E
C200HX-CPU64-(Z)E
C200HX-CPU65-ZE
C200HX-CPU85-ZE
CQM1H-CPU51
CQM1H-CPU61
6
5
9
1
RS-422A
connector
Pin number
Connector
hood
1
2
3
4
5
6
7
8
9
Abbreviation
FG
SDA
SDB
–
–
–
RDA
–
RDB
–
(9-pin type)
PC (CPU Unit)
Pin number
Abbreviation
F. Ground
SG
SDB
SDA
RDB
RDA
CSB
CSA
DIP Switch Settings
NT-AL001:
Pins 1, 3, 4, and 6 ON
Pins 2 and 5 OFF
NS-AL002:
Pin 1 to 3 ON
Pin 4 OFF
Link Adapter
RS-422A
terminal
block
NT-AL001
1
2
3
4
5
6
7
8
NS-AL002
1
---
3
7
2
6
---
---
Shield
NS-AL002
NT-AL001
7
5
3
1
8
6
4
2