Omron B7A Manual page 23

B7A/B7AS
Operation
Power Supply
There are normal-speed and high-speed 16-point models, which are different in recommended transmission cable and transmission distance.
If only a single power supply is connected to either the input model or output model, the current on the power line will be limited.
Screw Terminal Models
I/O Delay: Normal Speed
Connection of Independent Power Supplies
SIG
SIG
(+) (–)
+ –
+ –
DC power
supply
(12 to 24 V)
Connection of Single Power Supply to Input or Output Terminal
SIG
SIG
(+) (–)
+ –
I/O Delay: High Speed
Connection of Independent Power Supplies
SIG
SIG
(+) (–)
+ –
+ –
DC power
supply
(12 to 24 V)
B7A/B7AS
IN
SIG
–
Transmission distance
500 m max.
B7A/B7AS
IN
–
+
SIG
Transmission distance
100 m max.
B7A/B7AS
IN
Shielded cable
SIG
–
Transmission distance
100 m max.
ERROR SIG
ERR SIG
(+) (–)
+ –
+ – Note: A VCTF cable with a thickness of 0.75 mm
DC power
min. must be used for signal transmission.
supply
(12 to 24 V)
ERROR SIG
ERR SIG
(+) (–)
+ –
+ – Note: In this example, a VCTF transmission cable
DC power
with a thickness of 0.75 mm
supply
through which a current of 1.8 A max. can
(24 V)
be transmitted.
ERROR SIG
ERR SIG
(+) (–)
+ –
Note: In this example, a shielded cable with a thick-
ness of 0.75 mm
GND
+ –
transmission. It is recommended that the
DC power
shield be grounded.
supply
The maximum transmission distance is 10 m if
(12 to 24 V)
a VCTF wire with a thickness of 0.75 mm
used instead of a shielded cable for the trans-
mission path.
B7A/B7AS
B7A/B7AS
OUT
2
B7A/B7AS
OUT
2
is used,
B7A/B7AS
OUT
2
min. is used for signal
2
is
21