Omron NT20S - Page 73

54
Connection to a PC by the NT Link (1:N)
Section 2-6
S RS-485 connection
C200HX/HG/HE
OMRON PC
While controlling machinery and
monitoring lines, controls the
NT20S units when necessary.
C200H/HG/HE can be used.
RS-232C cable
(max. length: 2 m), or
directly connected
RS-485 cable
RS-232C/RS-422A
converter unit,
type NT-AL001
RS-232C/RS-422A
converter unit,
type NT-AL001
RS-232C/RS-422A
converter unit,
type NT-AL001
RS-232C/RS-422A
converter unit,
type NT-AL001
RS-485 cable (

) RS-485 cable (

) RS-485 cable (

) RS-485 cable (

)
RS-232C cable
(max. length: 2 m)
RS-232C cable
(max. length: 2 m)
RS-232C cable
(max. length: 2 m)
RS-232C cable
(max. length: 2 m)
NT20S NT20S NT20S NT20S
(

) Total cable length: 500m
RS-232C/RS-422A
converter unit,
type NT-AL001
[RS-232C Cable Wiring]
Same as for an RS-422A connection. Refer to “RS-422A connection” (page 52).
[RS-485 Cable Wiring]
S NT-AL001 to NT-AL001
3
4
5
6
Pin No.Abbrev.
SDB
SDA
RDB
RDA
RS-422A
terminal
block
Shielding
wire
NT-AL001 NT-AL001
RS-422A
terminal
block
Pin No. Abbrev.
1
3
4
5
6
SDB
SDA
RDB
RDA
Functional
ground
Functional
ground
1
S PC to NT-AL001
Abbrev.
SDA
SDB
RS-422A
interface
Shielding
wire
PC NT-AL001
RS-422A
terminal
block
Pin No. Abbrev.
1
3
4
SDB
SDA
Connector
cover
Connector cover