B7AH
B7AH
67
Specifications
Characteristics
General
Normal
speed
High speed
Communications method
Unidirectional, time-division multiplex
T
ransmission distance (See note 1.)
500 m max.
100 m max. (See note 2.)
I/O delay time
T
ypical: 19.2 ms; 31 ms max.
T
ypical: 3 ms; 5 ms max.
Minimum input time (See note 3.)
16 ms
2.4 ms
Operating voltage range
Transmission circuit (+V
, –V):
12 to 24 VDC (10.8 to 26.4 VDC) (See note 1.)
Logic circuit (VDD, VSS): 5 VDC ±
10% (4.5 to 5.5 VDC)
Insulation resistance
20 M
Ω
min. (250 V) between each pin and external parts
Dielectric strength
250 V
AC, 50/60 Hz, 1 min between each pin and external parts
Noise immunity (See note 4.)
Noise level: 1.5 kV
; pulse width: 100 ns to 1
µ
s (on transmission line due to coupling)
V
ibration resistance
10 to 55 Hz, 1.5-mm double amplitude
Shock resistance
300 m/s
2
Ambient temperature
Operating:
–10 to 55
°
C (with no icing or condensation)
Storage:
–25 to 65
°
C (with no icing or condensation)
Ambient humidity
Operating: 35% to 85%
Note: 1. The
transmission distance values stated in this table are possible if the Input or Output Link T
erminal is connected to an independent
power
supply
. If a single power supply is connected to the Input or Output Link T
erminal, the supply voltage must be 24 VDC
±10%,
in which case the transmission distance of a normal-speed model is 100 m maximum and that of a high-speed model is 50 m maxi
-
mum.
Refer to
Power Supply
on page
68 for details.
2. A
shielded transmission cable or a VCTF cable with a thickness of
0.75 mm
2
minimum must be used for signal transmission. If the
VCTF
cable is used, however
, the transmission distance will be 10 m maximum regardless of whether or not independent power
supplies
for the Input and the Output Link T
erminals are used.
3.
The minimum input time is required for the B7AH to read an input signal.
4. This
is the value for the inductive noise on the transmission line measured using a noise tester. For high-speed models, it is the
value without the shield line connected to ground.
I/O Specifications
Input
Item B7AH-T6D3, B7AH-T6D8
Input configuration
CMOS input
Input logic
Active high
I/O delay time
B7AH-T6D3: Normal speed (typical: 19.2 ms); B7AH-T6D8: High speed (typical: 3 ms)
Current consumption (see note)
Logic circuit: 20 mA max.; T
ransmission circuit: 30 mA max.
Input
Input voltage
0 to VDD (V)
Input current
0.04 to 0.06 mA/point
Minimum input time
B7AH-T6D3:
16 ms
B7AH-T6D8:
2.4 ms
ON/OFF
threshold
ON voltage
VDD(V) ×
0.7 min.
(3.15 V min. for VDD = 4.5 V; 3.5 V min. for VDD = 5 V; 3.85 V min. for VDD = 5.5 V)
OFF voltage
VDD (V) ×
0.3 min.
(1.35 V min. for VDD = 4.5 V; 1.5 V min. for VDD = 5 V; 1.65 V min. for VDD = 5.5 V)
Weight
Approx. 10 g
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