7-3
Section
Counter Units
138
Terminal Arrangement
Encoder input
External input
External output
Wiring
Encoder input
External input
External output
Encoder
(incremental,
open-collector
output type)
NPN output
3-wire sensor (photo-
electric sensor, prox-
imity sensor)
Solenoid/Valve
Solenoid/Valve
Bla
ck
Blu
e
(w
hi
te)
(b
lack)
(red)
Br
ow
n
The NCs are input terminals
for connections. They have
no shielding function. Carry
out processes for shielding
(grounding) as necessary.
2-wire sensor
(limit switch)
Br
ow
n
(w
hi
te)
Blu
e
(b
lack)
24 VDC
24 VDC
24 VDC
Internal connections
Note
Do not use the same power supply for the encoder as that used for other I/O
Units or communications.