B7A
B7A
87
Specifications
Characteristics
General
Item Normal
speed
Communications method
Unidirectional, time-division multiplex
T
ransmission distance (see note 1)
500 m max.
I/O delay time
T
ypical: 19.2 ms; 31 ms max.
Minimum input time (see note 2)
16 ms
Operating voltage range
12 to 24 VDC (10.8 to 26.4 VDC) (see note 1)
Insulation resistance
100 M
Ω
min. (500 V) between each terminal and external parts
Dielectric strength
1,000 V
AC, 50/60 Hz for 1 min between each terminal and external parts
Noise immunity
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)
Storage:
–25 to 65
°
C (with no icing)
Ambient humidity
Operating: 35% to 85% (with no condensation)
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 is 100 m maximum. Refer to
Power Supply
on page
89 for details.
2.
The minimum input time is required for the B7A to read an input signal.
Input Models
Item Screw
terminal models
Modular models
B7A-T10S1 B7A-T10S3 B7A-T10M2
Compatible inputs
Switches, three-wire NPN sensors (see note 1) TTLs, switches
Input logic
Active low
Active high
Current consumption
(see note 2)
80 mA max. with all input terminals ON
40 mA max. with all input terminals
ON
Input voltage range
0 VDC to supply voltage
0 to 5 VDC
±10%
Operating voltage
range
12 to 24 VDC
Input current range
–4.4 to –1.1 mA/point (current flowing from input terminals)
1.7 to 2.2 mA/point
Minimum input time
(see note 3)
16 ms
ON/OFF threshold
No-contact input:
ON voltage:
1.6 V max.
OFF voltage:
5.5 V min.
Contact input:
ON discrimination resistance:
140
Ω
max.
OFF discrimination resistance:
5 kΩ
min.
ON voltage:
2.2 V min.
OFF voltage:
0.8 V max.
Mounting strength
No damage when 49-N pull is applied for 1 min each in all directions
(except direction of DIN track)
---
T
erminal strength
No damage when 49-N pull is applied for 1 min each in all directions
---
T
ightening torque
0.78 to 1.18 N
S
m
---
Weight
Approx. 100 g
Approx. 12 g
Note: 1. The
polarity of the B7A-TS10S1’
s B
j
terminal is negative. Therefore, supply power to the three-wire sensor from the positive pow
-
er
supply terminal or a power supply
.
2.
Consumption when all 10 points are ON. Excludes external sensor current for Input T
erminals.
3.
The minimum input time is required for the B7A to read an input signal.
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