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2.2.3
Modbus wiring
The recommended cable is a hose with three cables plus a shield. These cables must have
a characteristic impedance of 120 Ω.
It is recommended to connect the shield to ground only at one end.
The cable connection between the MBC1 converter and a Master is the following:
The instrument has a jumper on the control board (J7) that connects the 120 ohm
termination resistor needed when it is at one end of the Modbus line.
Terminal
1
2
3
MBC1 converter
Terminal A
Terminal B
GND
18
A
B
Ground (GND)
Master
A/D-
B/D+
G/Reference
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