Omron B7A Manual page 86

DRT1-B7AC
Communications Specifications
Conformance with DeviceNet
Communications method
Maximum number of connecting
nodes
Connection format
Baud rate
Communications distance
Length of data packets
Cables
B7A
Communications method
Transmission distance
I/O delay time (see note)
Number of ports
I/O connection format
Number of I/O points
Note: The I/O delay time is selected with a DIP switch.
Nomenclature
DRT1-B7AC
DIP Switch 1
Pins 1 to 6: Node address
Pins 7 and 8: Baud rate
84
CSMA/NBA
64 max. (including the master)
The maximum number of slaves that can be connected to the network is 63.
Multi-drop, T-branching (main lines/branch lines), and branching (branch lines)
125 Kbps/250 Kbps/500 Kbps (switchable)
Baud rate
500 Kbps
250 Kbps
125 Kbps
0 to 8 bytes
Cables conforming to DeviceNet standards (2 signal lines; 2 power supply lines: 2; 1 shield
line)
Unidirectional, time-division multiplex
50 m max. (normal speed); 30 m max. (high speed)
High speed: 3 ms, 5 ms max. (typical)
Normal speed: 19.2 ms, 31 ms max. (typical)
3 ports
FA connector
30 points (10 3 ports)
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
Mounting Hole
Max. network length Branch line length
100 m max. 6 m max.
250 m max. 6 m max.
500 m max. 6 m max.
Connector for Power
Supply to Internal
Circuits
B7AC Connector
DRT1-B7AC
Total branch line
length
39 m max.
78 m max.
156 m max.
Indicators
Communications
Connector