DRT1-B7AC
DRT1-B7AC
84
Communications Specifications
Conformance with DeviceNet
Communications
method
CSMA/NBA
Maximum number of connecting
nodes
64 max. (including the master)
The maximum number of slaves that can be connected to the network is 63.
Connection format
Multi-drop, T
-branching (main lines/branch lines), and branching (branch lines)
Baud rate
125 Kbps/250 Kbps/500 Kbps (switchable)
Communications distance
Baud rate
Max. network length
Branch line length
T
otal branch line
length
500 Kbps
100 m max.
6 m max.
39 m max.
250 Kbps
250 m max.
6 m max.
78 m max.
125 Kbps
500 m max.
6 m max.
156 m max.
Length of data packets
0 to 8 bytes
Cables
Cables conforming to DeviceNet standards (2 signal lines; 2 power supply lines: 2; 1 shield
line)
B7A
Communications method
Unidirectional, time-division multiplex
T
ransmission distance 50 m max. (normal speed); 30 m max. (high speed)
I/O delay time (see note)
High speed: 3 ms, 5 ms max. (typical)
Normal speed: 19.2 ms, 31 ms max. (typical)
Number of ports
3 ports
I/O connection format
F
A connector
Number of I/O points
30 points (10
×
3 ports)
Note:
The I/O delay time is selected with a DIP switch.
Nomenclature
DRT1-B7AC
DIP Switch 2
Pins 1 to 3: B7AC baud rate selection
Pins 4 and 5: Not used.
Pins 6 to 8: Setting for sending B7AC communications errors to Master Unit
Indicators
Communications
Connector
Connector for Power
Supply to Internal
Circuits
B7AC Connector
Mounting Hole
DIP Switch 1
Pins 1 to 6: Node address
Pins 7 and 8: Baud rate
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