KEYENCE BL-600 Series - Manual (Page 41)

Chapter 3 Connection and Installation
31
3
3.2.4 Connecting the N-42 to RS-422A
RS-422 terminal block assignment
The terminals of the RS-422A terminal block of the N-42 are assigned as shown in
the figure.
■ RS-422 terminal block assignment
Note 1: The cable can be extended to within 1.2 km.
Note 2: Turn ON the terminators (BL-U1/external unit terminal resistance: 100 Ω).
Wiring the RS-422A
Connect the N-42 to other devices with the following wiring.
■ Connecting a general RS-422A unit
Use the same wiring when connecting the N-42 to the N-42.
RS-422
SG SD+ RD+ SD– RD–
TERMINA
TOR
ON OFF
POW
ER
SD
RD
READER
RS-422
terminal block
e d o C n o i t p i r c s e D n o i t c e r i d l a n g i S
G S d n u o r G —
+ D S . l a n i m r e t + o t a t a d s d n e S t u p t u O
- D S . l a n i m r e t - o t a t a d s d n e S t u p t u O
+ D R . l a n i m r e t + m o r f a t a d s e v i e c e R t u p n I
- D R . l a n i m r e t - m o r f a t a d s e v i e c e R t u p n I
TERMINA
TO
R
ON
OFF
[ON]
SD +
SG
N-42
External unit
(N-42)
SD –
RD +
RD –
RD +
SG
RD –
SD +
SD –
Twisted pair cable