B7AS
B7AS
12
Specifications
Characteristics
General
Normal
speed
High speed
Communications method
Unidirectional, time-division multiplex
T
ransmission distance
500 m max.
100 m max. (see note 1)
I/O delay time
T
ypical: 19.2 ms; 31 ms max.
T
ypical: 3 ms; 5 ms max.
Minimum input time (see note 2)
16 ms
2.4 ms
Operating voltage range
12 to 24 VDC (10.8 to 26.4 VDC)
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 (see note 3)
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% (with no condensation)
Note: 1. 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.
2.
The minimum input time is required for the B7A/B7AS to read an input signal.
3.
For high-speed models, these values are possible without grounding the shielded line.
Input Models
Item B7AS-T3BS
Compatible
inputs
(see note 1)
Switches, two-wire sensors with DC output, three-wire NPN sensors
Input logic
Active low
I/O delay time
Normal speed (typical 19.2 ms); high speed (typical 3 ms) (see note 3)
Current consumption (see note 2)
240 mA max. with all input terminals ON
Operating voltage range
12 to 24 VDC
Input voltage range
0 VDC to supply voltage
Input current range
–6 to –3 mA/point (see note 4)
Minimum input time
Normal speed: 16 ms; high speed: 2.4 ms
ON/OFF threshold
No-contact input:
ON discrimination voltage:
4 V max.
OFF discrimination voltage:
6 V min.
Contact input:
ON discrimination resistance:
660
Ω
max.
OFF discrimination resistance:
2 kΩ
min.
Mounting strength
No damage when 49-N pull is applied for 1 min each in all directions (except in direction of DIN
track)
T
erminal strength
No damage when 49-N pull is applied each in all directions
T
ightening torque
0.78 to 1.18 N
S
m
Weight
Approx. 230 g
Note: 1. T
wo-wire sensors must satisfy the following requirements:
Residual voltage:
4 V max.
Current leakage: 1.5 mA max.
The lower limit of control output:
3 mA (Use a bleeder resister to eliminate this restriction.)
2.
Consumption when all 32 points are ON. Excludes external sensor current consumption.
3.
Factory-set to normal speed (typical 19.2 ms).
4.
The minus sign indicates that the current is flowing out from input terminals.
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