Siemens SINAMICS CU240S DP-F - Page 104

Commissioning
5.8 Commissioning the Encoder
Control Units CU240S
104 Operating Instructions, 07/2008 - FW 3.2, A5E00766042B AD
CAUTION
Use of unscreened cables is possible, however we recommend the use of screened cables,
in order to fulfill the EMC requirements for the CE marking and fail-safe products (CU240S
DP-F).
Note
The cable from the encoder to the Encoder Module should be one complete length.
TTL-encoder specific
If the encoder type is a TTL differential and a long cable length is required (>50 m), DIP
switches 5, 6, and 7 may be set to ON.
If the encoder type is a TTL single-ended encoder, there will be a three wires for the ‘A’, 'B'
and 'Z' Channels.
HTL-encoder specific
The terminating impedance which is selected using the DIP-switches must not be used in
conjunction with an HTL encoder.
The encoder voltage is using the general I/O DIP switches 3 and 4.
The following table shows the possible settings:
Table 5-12 Encoder voltage settings
On
OFF
34
9(QFRGHU
VXSSO\
9(QFRGHU
VXSSO\
34
9(QFRGHU
VXSSO\
9(QFRGHU
VXSSO\
34
9(QFRGHU
VXSSO\
9(QFRGHU
VXSSO\
34
9(QFRGHU
VXSSO\
9(QFRGHU
VXSSO\
Encoder supply
voltage
0 V 24 V 5 V 24 V
Encoder type No encoder HTL encoder TTL encoder HTL encoder
WARNING
DIP switches 3 or 4 in ON position provide a supply voltage of 24 V to the encoder.
Therefore it is not allowed to connect a TTL encoder to the inverter if one of the DIP
switches, 3 or 4 are in ON position.