4 Electrical connection
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Connection example with JUMO mTRON T (Modbus operation)
The example shown below shows an installation for monitoring an aquaculture. 3 sensors (for the mea-
surands of conductivity, oxygen content, and pH) are connected to a JUMO mTRON T. The sensors are
connected to one another via a JUMO digiLine hub and M12 connecting cables. Appropriate fittings are
available from JUMO for mounting the sensors.
(1) Interface module for digiLine master connecting cable, with screw terminals and 9-pole D-sub pin
header
(2) mTRON T central processing unit with RS485 interface as digiLine master (Modbus master)
(3) JUMO digiLine master connecting cable with exposed wire ends at one end for connection to devices
with screw or spring-cage terminals (for connection see interface description for the JUMO digiLine
of the JUMO mTRON T)
(4) JUMO digiLine hub with 4× M12 sockets and 1× M12 plug connector, each 5-pole A-coded; supply
DC 24 V with separate power supply unit
(5) separate DC 24 V power supply unit for the voltage supply to the JUMO digiLine-bus system
(6) JUMO pH sensor with 5-pole JUMO digiLine pH
(7) JUMO digiLine O-DO S10 – optical oxygen sensor for dissolved oxygen
(8) JUMO digiLine Ci in the device version with separate sensor
(9) inductive conductivity sensor
(10)D-sub connecting cable (round), 9-pole socket and pin header
Wiring diagram for Modbus mode