HBM MP85 - Page 34

34
PME-MP85
A0897−3.4 enHBM
A supply voltage is available at screw terminals 5 and 6, pins 7 and 8 for
feeding incremental transducers and transducers with an SSI interface.
Switch S1 is used to toggle between an internal and an external supply. The
device has to be opened to do this. (see Chapter 3).
• Transducer supplied from the MP85/MP85DP:
Transducer supply voltage 5V "10 %, 150 mA max. (for both channels
together). The supply is then not electrically isolated from the
measurement system.
• Transducer supplied from an external power pack:
At screw terminal 3, pins 5 and 6, a voltage between 10 − 30 V
DC
(nominal
24 V
DC
) including ground is applied. A current of max. 300 mA (for both
channels together) can then be drawn at transducer terminals 5 and 6.
This external supply voltage is electrically separated from the signal ground
and at the same time feeds the digital control outputs.
Screw terminal 3
Screw terminal 5
Screw terminal 6
78
5
6
S1
GND +5 V / 24 V
GND_int 5 V_int
GND_ext
24 V_ext
78
Fig. 5.6: Supplying active encoders (schematic diagram)