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Appendix A
Specifications
Standard Specifications
The standard specifications of the B7A Interface Unit conform to those of the CQM1H/CQM1 PC.
Performance Specifications
1. Input mode setting allows selection between 16-point input and 15-point+1 error input.
2. Input mode setting allows selection between 32-point input and 30-point+2 error input. Refer to 2-2
Switch Settings.
3. The maximum transmission distance of the B7A Interface Unit varies with the transmission delay time
and the method of wiring. Refer to 3-1 Connections to B7A Link Terminals for details.
4. Minimum input time is the minimum required time to read an input signal from the CPU. The ON/OFF
signal range from the CPU to the B7A Interface Unit’s output bit should be larger than the minimum
input time.
Item Specification
I/O points B7A21: 16 input points (see note 1), 16 output points
B7A13: 32 input points (see note 2)
B7A03: 32 output points
B7A12: 16 input points (see note 1)
B7A02: 16 output points
I/O word allocation B7A21: 1 word each for input and output (2 words in total)
B7A13: 2 words for input
B7A03: 2 words for output
B7A12: 1 word for input
B7A02: 1 word for output
Communication method Unidirectional, time-division multiplex
Transmission distance
(see note 3)
STANDARD: 500 m max.
RAPID: 100 m max.
Transmission delay time STANDARD: 19.2 ms (rated delay), 31 ms max.
RAPID: 3 ms (rated delay), 5 ms max.
Minimum input time
(see note 4)
STANDARD: 16 ms
RAPID: 2.4 ms
Power consumption 100 mA at 5 VDC
External power supply 12 to 24 VDC ±10% (excluding the power required by the B7A Link Terminals)
B7A21: 0.11 A min.
B7A13: 0.07 A min.
B7A03: 0.10 A min.
B7A12: 0.05 A min.
B7A02: 0.04 A min.
Weight 200 g max.
Dimensions 32 x 110 x 107 (W x H x D) mm
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