GV20401a_e.doc / Sep-08
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4.
Power Supply
4.1.
Supply from an unstabilized 10 - 30 volts DC source
In general, the unit is supplied with an unstabilised DC voltage of 10 - 30 V, using the screw
terV
B
and GND. In this case pin 4 of the input Sub-D-connector will also provide a +5 V
auxiliary output for encoder supply (max. 150mA).
4.2.
Supply from a stab5 volts DC source
The unit accepts also stabilized supply from a +5 V source (e.g. when the input comes from the
encoder simulation of a drive which is also intended to supply the splitter). In this case,
Pin 4 (+5 V) and Pin 5 (GND) of the 9-position input connector are suitable to apply power.
Units supplied with 5 volts only are unable to generate output levels higher than
5 volts, unless a corresponding voltage is applied to screw teVext.
The screw terminal marked "Shield" connects the metallic housings of the Sub-D-connectors
only. Depending on individual needs for earthing and screening, it can remain unconnected or
tied to earth or to unit GND.
•
For technical reasons no reverse polarity protection is available when the
unit is supplied with +5 volts only. Wrong polarity misconnection of the
5 volts power may cause serious damage to the unit.
•
Screw terminal "+V
ext"
and pin 4 of the 9-position input connector are
galvanically connected inside the unit. It is therefore not allowed to apply
different potentials to these two positions
