Kobold DON -2/4, Operating Instructions Manual

Page: 11 / 65

DON
DON K36/1222 page 11
7. Electrical Connection
7.1 Connecting Cable
Proper shielded instrument cable is highly recommended. Low capacitance twisted
pair 7 x 0.3 mm (0.5 mm²) for use with the DON and any remote receiving
instrumentation. Typical cable would be Belden® 9363 or similar. Connect the
cable shield to DC common or designated grounding terminal at the receiving
instrument. Remember to only connect the end of the cable shielding at the
receiving instrument (not the DON) to ensure proper interference protection.
Please be sure not to run the connecting cable within a common conduit or in close
proximity to conduit with high inductive loads or power sources. This could result
in noise or inducted errors to the output signal or result in damage to the electronic
components. Always run the instrument cables in a separate conduit or within a
common conduit with other low power cables. Max cable length should be limited
to 3280 ft (1000 m).
7.2 Electrical connection for integrated electronics options
The electrical connection of the integrated electronics options always requires the
electronics cover to be dismantled. Models from size X05 to X20 incorporate the
cable inlet into the electronics cover, while models from the X25 size onwards
accommodate the cable inlet in the housing cover.
The connecting cable must be routed through the cable duct and connected in
accordance with 7.2.1 to 7.2.3. The connecting terminals are of the plug-in type,
and can be taken out of the terminal compartment to facilitate connection.
7.2.1 Hall-effect sensor with active pulse output
(H0/HE/HA/B0/BE/BA/G0/GE/GA/K0/KE/KA/HU options)
The electronics options combine a hall-effect sensor with an active push-pull output
stage. The B0/BE/BA options involve combining bipolar Hall sensors with
alternating polarised magnets. This option is particularly suitable for pulsating
currents, although the pulse rate is halved compared to the H0/HE/HA option. A
three-phase electrical connection is used. The output is actively switched, either to
the input terminal vVs or to GND. The external input terminal voltage is 8
to 30 V
DC
. No additional external wiring is required (e.g. pull-up resistor). The high
signal corresponds approximately to the +Vs input terminal voltage and the low
signal approximately to 0 V.
The electrical load can be connected to either the input terminal voltage or GND
Max. output current (power source or sink): 100 mA (short-circuit protected).