B7AH
B7AH
68
Output
Item
B7AH-R6D53, B7AH-R6D58
Output configuration
CMOS output
I/O delay time
B7AH-R6D53: Normal speed (typical: 19.2 ms); B7AH-R6D58: High speed (typical: 3 ms)
Current consumption (see note)
Logic circuit: 20 mA max.; Transmission circuit: 30 mA max.
Output
Output
voltage
H level
VDD (V) – 0.4 V min.
(4.1 V min. for VDD = 4.5 V; 4.6 V min. for VDD = 5 V; 5.1 V min. for VDD = 5.5 V)
g
L level
0.4 V max.
Output
t
H level
Sourcing current, 2 mA/point
Ou pu
current
L level
Sinking current, 2 mA/point
Output logic
Active high (positive logic): N/P pins open
Operation:
Input ON
→
Output ON
Input OFF
→
Output OFF
Active low (negative logic): N/P pins connected to VDD (5 V)
Operation:
Input ON
→
Output OFF
Input OFF
→
Output ON
Error processing
LOAD OFF (output interrupted): H/L pins open
o p ocess g
HOLD (output held): H/L pins connected to VDD (5 V)
Weight
Approx. 10 g
Note:
Consumption when all 16 points are ON. Excludes output current.
Operation
Noise and Miswiring Protection Circuits
Power supply noise protection circuit
SIG pin miswiring protection
circuit
Input and output pin
protection circuits
Include the power supply noise protection circuit shown below
if there is a possibility of noise interference bV and
–V (12 to 24-V power supply pins).
Diode for preventing
reverse connection
Power
supply
12 to
24 VDC
Coil for removing common
mode noise 2 mH
50 V
0.1
µ
F
50 V
0.1
µ
F
50 V
0.1
µ
F
50 V
0.1
µ
F
35 V
10
µ
F
GND
+V
–V
B7AH
+
–
Include the circuit shown below if
there is a possibility of miswiring
between the SIG pin and the +V pin
or VDD pin. (Connect to the SIG pin
of B7AH input models.)
B7AH input model
PTH (thermistor)
Resistance: 47
Ω
Maximum current: 0.5 A
SIG
Include the circuit shown below
if there is a possibility of noise
or static electricity affecting
input pins.
B7AH input model
Zener diode
10 V, 1 W
VSS
IN
00 to 15
Include the power supply noise protection circuit shown below
if there is a possibility of noise interference between VDD and
VSS (5-V power supply pins).
Diode for preventing
reverse connection
Power supply
5 VDC
1/6W 1
Ω
35 V 10
µ
F
+
–
VDD
VSS
B7AH
Include the circuit shown below
if there is a possibility of noise or
static electricity affecting output
pins.
B7AH output model
Zener diode
10 V, 1 W
OUT
00 to 15,
ERR
VSS
Power Supply
The B7AH is available in both normal-speed models and high-speed models. The recommended cable lengths and transmission distances are
different for the 2 types. If a single power supply is connected to the Input or Output Link Terminal, (i.e., on the input side or output side), there are
restrictions on the current that can flow along the power line.