IM 12J6B3-E-H
Installation and wiring 3-7
3-5. Wiring the analog output signals
3-5-1. General precautions
The analog output signals of the EXA transmit low power standard industry signals to peripherals like
control systems or strip-chart recorders (Figure 3-6).
3-5-2. Analog output signals
The output signals consist of active current signals of either 0-20 mA or 4-20 mA. The maximum load can
be 600 ohms on each.
It is necessary to use screening/shielding on the output signal cables. Terminal 63 is used to connect the
shielding.
3-6. Wiring the standard galvanic sensor
The sensor cable has markers on the individual wires.
These markings refer to the markers on the terminals.
The temperature compensator has two wires with the markings T1, T2 and/or 11, 12 and must be
connected to terminal 11 and 12.
The measuring electrode: the cathode is marked with IE and/or 13 and must be connected to terminal 13.
The reference electrode: the anode is marked with RE and/or 15 and must be connected to terminal 15.
The liquid earth ( solution ground) is marked with 16 and must be connected to terminal 16.
The overall shield of the cable is marked with 14 and must be connected to terminal 14.
Note:
Always interconnect terminal 13 and 17 to reduce noise voltage onto measurement.
3-7. Wiring other galvanic sensors
Consult the users manual for the color identification of the sensor cable and connect temperature
compensator, cathode and anode to the terminals: 11, 12, 13 and 15 as described above.
Connect the cable shield to 14 if there is one available. Sensor diagnostics is normally not possible.
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