Bronkhorst Modbus slave interface - Manual (Page 12)

BRONKHORST ®
Bronkhorst offers special begin-termination connectors with the resistor network. This handles correct termination
but also gives a defined voltage on the Modbus D1 and D0 line for even more reliability of the bus system.
An end-terminator is also offered by Bronkhorst and handles correct termination ad the end of the bus.
Termination can be performed with special termination-connectors, offered by Bronkhorst.
Termination schematic
RJ45 M12
703297
Begin terminator
703298
End terminator
703515
Begin terminator
703321
End terminator
+15…24Vdc
RB1
976 Ohm
RT1
121 Ohm
RB2
392 Ohm
Modbus system
D1 Modbus (B/B’)
D0 Modbus (A/A’)
RT2
121 Ohm
Begin termination (RED) End termination (BLACK)
Page 12 Modbus interface 9.17.035