KEYENCE N-48/42 User Manual
Page 11
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11
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N-42
Connect the N-42 to external equipment through
the RS-422A communication interface as
described below.
CONNECTING THE COMMUNICATION INTERFACE
RS-422A
SG SD+ SD– RD+ RD–
*
Turn ON the terminator of both the N-42 and
the external equipment (termination resistor:
100
Ω
). (See p. 9.)
*
The cable extension distance must be within
1.2 km.
Code
Description
Signal
direction
SG
Ground
–
SD+
Sends data to + terminal.
Output
SD-
Sends data to - terminal.
Output
RD+
Receives data from + terminal.
Input
RD-
Receives data from - terminal.
Input
•
Connecting N-42 to general RS-422
equipment
To connect the N-42 to another N-42 unit,
perform the same connections.
SG
SD+
SD–
RD+
RD–
SG
RD+
RD–
SD+
SD–
N-42
External equipment
(N-42)
Twisted pair cable
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