Omron B7A Manual page 19

B7A/B7AS
Specifications
Characteristics
General
Communications method
Transmission distance (see note 1)
I/O delay time
Minimum input time (see note 3)
Operating voltage range
Insulation resistance
Dielectric strength
Noise immunity (see note 4)
Vibration resistance
Shock resistance
Ambient temperature
Ambient humidity
Note: 1. The transmission distance values stated in this table are possible if the Input or Output Link Terminal is connected to an independent
power supply. If a single power supply is connected to the Input or Output Link Terminal, 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 21 for details.
2. A shielded transmission cable or a VCTF cable with a thickness of 0.75 mm
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 Terminals are used.
3. The minimum input time is required for the B7A/B7AS to read an input signal.
4. For high-speed models, these values are possible without grounding the shielded line.
Input Models
Item
Compatible inputs Switches, two-wire sensors with DC output, three-wire NPN sensors
(see note 1)
Input logic Active low
I/O delay time B7Aj-T6j1: normal speed (typical 19.2 ms); B7Aj-T6j6: high speed (typical 3 ms)
Current consumption 120 mA max. with all input terminals ON
(see note 2)
Operating voltage range 12 to 24 VDC
Input voltage range 0 VDC to supply voltage
Input current range –6 to –3 mA/point (current flowing from input terminals)
Minimum input time B7Aj-T6j1: 16 ms; B7Aj-T6j6: 2.4 ms
ON/OFF threshold No-contact input:
Contact input:
Mounting strength No damage when 49-N pull is applied for 1 min each in all directions (except in direction of DIN track)
Terminal strength No damage when 49-N pull is applied each in all directions
Tightening torque 0.78 to 1.18 N m
Weight Approx. 160 g
Note: 1. All B terminals of the B7A-T6Aj are negative terminals; power must be supplied to the three-wire sensor via the positive power
supply terminal or from an independent power supply.
Two-wire sensors must satisfy the following requirements:
Residual voltage:
Current leakage:
The lower limit of control output:
2. Consumption when all 16 points are ON. Excludes external sensor current for Input Terminals.
Normal speed
Unidirectional, time-division multiplex
500 m max.
Typical: 19.2 ms; 31 ms max.
16 ms
12 to 24 VDC (10.8 to 26.4 VDC) (see note 1)
100 MΩ min. (500 V) between each terminal and external parts
1,000 VAC, 50/60 Hz for 1 min between each terminal and external parts
Noise level: 1.5 kV; pulse width: 100 ns to 1 µs (on transmission line due to coupling)
10 to 55 Hz, 1.5-mm double amplitude
2
300 m/s
Operating: –10 to 55 C (with no icing)
Storage: –25 to 65 C (with no icing)
Operating: 35% to 85% (with no condensation)
B7A-T6A1/-T6A6
ON voltage: 4 V max.
OFF voltage: 6 V min.
ON discrimination resistance: 660 Ω max.
OFF discrimination resistance: 2 kΩ min.
4 V max.
1.5 mA max.
3 mA (Use a breeder resister to eliminate this restriction.)
100 m max. (see note 2)
Typical: 3 ms; 5 ms max.
2.4 ms
2
minimum must be used for signal transmission. If the
Screw terminal models
B7A-T6B1/-T6B6
B7A/B7AS
High speed
B7AS-T6B1/-T6B6
Approx. 130 g
17