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2-7
Section
Connection to a PC by the NT Link (1:N)
52
- RS-232C Cable Wiring
NT620S/NT620C or PC
RS-232C
interface
Abbrev.
Pin No.
Connector
cover
NT-AL001
Pin No.
Abbrev.
RS-232C
interface
2
3
4
5
6
9
SD
RD
RS
CS
+5V
SG
SD
RD
RS
CS
+5V
SG
2
3
4
5
6
9
This connection is not
possible when using
NT620S/620C
- RS-422A Cable Wiring (1)
PC or NT-AL001
Abbrev.
Functional
ground
RS-422A
terminal
block
NT-AL001
SDA
SDB
RDA
RDB
Abbrev.
Functional
ground
RS-422A
terminal
block
SDA
SDB
RDA
RDB
- RS-422A Cable Wiring (2)
NT-AL001
Abbrev.
Functional
ground
RS-422A
terminal
block
NT-AL001
SDA
SDB
RDA
RDB
Abbrev.
Functional
ground
RS-422A
terminal
block
SDA
SDB
RDA
RDB
S
RS-485 Cables
When using RS-485 cables, note the following points.
- The wiring for RS-485 cables is always the same regardless of the location.
Follow the instructions below in order to complete the wiring correctly.
- Always set a terminal resistor (terminator) at both ends of the RS-485 cable.
Do not set terminal resistors at any other position.
- When equipment has functional ground terminals, always connect the
shielding of the RS-485 cable to these terminals.
- Always use an RS-232C/RS-422A converter unit (NT-AL001) to make a con-
nection between an NT620S/NT620C and an RS-485 cable.
Summary of Contents for NT620C
Page 1: ...Cat No V033 E1 5 Programmable Terminals NT620S 620C OPERATION MANUAL...
Page 2: ...NT620S 620C Programmable Terminals Operation Manual Revised April 2001...
Page 3: ...iv...
Page 5: ...vi...
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