218
B7AC Interface Units
Section 5-5
Communications Specifications (with B7AC-series Units)
Components of the DRT1-B7AC
Ambient operating
humidity
25% to 85% (with no condensation)
Degree of protection
IP66
Mounting method
M5 screws
Mounting strength
100 N for 10 s
Communications
connector strength
100 N pull for 10 s
Weight
Approx. 500 g max.
Item
Specification
Number of ports
3 ports for communications with B7AC Link Terminal Units
(Round shielded connectors)
Number of I/O points 30 inputs (10 inputs/port
×
3 ports)
Communications
method
Split multiplex transmission in one direction
Transmission delay
Standard: 19.2 ms typical (31 ms max.)
High-speed: 3 ms typical (5 ms max.)
Communications
path
0.5 mm VCTF cable, 1 A current max. on +/
−
lines
Communications dis-
tance
With standard transmission delay: 50 m max.
With high-speed transmission delay: 30 m max.
Item
Specification
1
ON
2
3
4
5
6
7
8
1
ON
2
3
4
5
6
7
8
B7A
ERR OFF
B7A
SPEED
NODE ADDRESS
ON
DR
A
B
C
AB
NC
NC
C
12
38
16
32
01
NS
MS
ERR C
ERR B
ERR A
NC
B
P
A
C
DeviceNet indicators
(Refer to page 312.)
DeviceNet communications
connector
External power
supply connector
DIP switch 1:
Pins 1 to 6: Node address setting
Pins 7 and 8: Baud rate setting
(Refer to page 215.)
DIP switch 2:
Pins 1 to 3: B7AC transmission delay setting
Pins 4 and 5: Reserved (Always OFF.)
Pins 6 to 8: B7AC communications error signal setting
(Refer to page 219.)
B7AC-series indicators
Indicate the status of each port.
Not used.
B7AC-series Unit
connectors
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