KEYENCE N-48/42 - Manual (Page 11)

11
■ 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