HEIDENHAIN PROFIBUS-DP (DPV2) - Manual (Page 23)

Absolute encoder installation
23
Encoders equipped with cable glands are delivered with a dust
protection foil from the factory. The protection foil needs to be
removed prior to install the cables.
It is recommended that encoders with cable gland are equipped
with a shielded power supply cable with conductor area between
0,34 mm 2 to 1.5 mm 2 . Permissible outer cable diameter is
ø 6 mm to ø 8 mm for the power supply cable. Located inside the
back cover are two screw terminals containing the required power
supply terminals marked (+) and (-). In the case were the encoder
is the last node in the bus-structure and only the cable glands for
Supply and Bus-in is in use, the Bus out cable gland should be
replaced with a M16 filler plug to ensure proper sealing.
The (+) terminal shall be used to connect the +EV-line (9-36 Vdc).
The (-) terminal shall be used to connect the 0 V-line.
Figure 8 Terminal connections of power supply cables
Note: Tighten all screws in the terminal, even if no cable has
been attached.