B7A/B7AS
B7A/B7AS
21
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
IN
SIG
SIG
–
(–)
+
(+)
SIG
SIG
–
(–)
+
(+)
OUT
ERR
ERROR
Transmission distance
500 m max.
SIG
–
Note:
A VCTF cable with a thickness of 0.75 mm
2
min. must be used for signal transmission.
+
–
DC power
supply
(12 to 24 V)
+
–
DC power
supply
(12 to 24 V)
B7A/B7AS
B7A/B7AS
Connection of Single Power Supply to Input or Output Terminal
SIG
SIG
–
(–)
+
(+)
SIG
SIG
–
(–)
+
(+)
ERR
ERROR
–
+
IN
OUT
Note:
In this example, a VCTF transmission cable
with a thickness of 0.75 mm
2
is used,
through which a current of 1.8 A max. can
be transmitted.
+
–
DC power
supply
(24 V)
SIG
Transmission distance
100 m max.
B7A/B7AS
B7A/B7AS
I/O Delay: High Speed
Connection of Independent Power Supplies
SIG
SIG
–
(–)
+
(+)
SIG
SIG
–
(–)
+
(+)
ERR
ERROR
SIG
–
IN
OUT
Note:
In this example, a shielded cable with a thick-
ness of 0.75 mm
2
min. is used for signal
transmission. It is recommended that the
shield be grounded.
The maximum transmission distance is 10 m if
a VCTF wire with a thickness of 0.75 mm
2
is
used instead of a shielded cable for the trans-
mission path.
+
–
DC power
supply
(12 to 24 V)
(12 to 24 V)
Transmission distance
100 m max.
Shielded cable
+
–
DC power
supply
GND
B7A/B7AS
B7A/B7AS