Encoder Power Supply For Ssi Encoders - Siemens SIMODRIVE 611 digital Configuration Manual

3 Motor Selection, Position/Speed Sensing
3.4 Direct position sensing
3.4.3

Encoder power supply for SSI encoders

General
information
What has to be
observed?
3-76
www.aotewell.com
For SIMODRIVE, an internal 5 V is provided to supply encoders. When using
SSI encoders, the power supply voltage must be externally connected to the
encoder cable.
The following must be observed (refer to Fig. 3-7):
Note
SSI encoders are likely to have lower noise immunity due to the encoder and
the 24 V power supply.
The encoders must be supplied with a separately regulated 24 V voltage
S
(e.g. SITOP power) in order to avoid disturbances/noise due to contactors, etc.
S The external 24 V power supply must have "safe separation" (PELV).
Filter data:
S
-- The special filter is required in order to filter--out noise and disturbances
-- Maximum continuous operating current = 0.8 A (use a fuse!)
-- Max. voltage = 30 V
-- One filter is designed for two encoders with a maximum current = 0.4 A
S The 24 V supply (reference potential) should be connected to the electronics
ground of the system (e.g. terminal X131 on the NE module) if this connec-
tion is not already provided in the encoder.
Maximum cable length between the 24 V supply and the filter ≤ 10 m
S
Maximum encoder cable = 40 m
S
The technical data of the encoder manufacturer must be carefully observed.
S
S Third--party encoders must be connected using the adapter cables provided
by the particular manufacturer.
Filter
6SN1161- -1DA00- -0AA0
Power supply cables l ± 20 cm
Fig. 3-7 Connecting SSI encoders to SIMODRIVE 611
SIMODRIVE 611 Configuration Manual (PJU) - - 05/2008 Edition
sales@aotewell.com
0.8 A
≁
6FX8002- -2CC80- -.../OEM l
SSI
SIMODRIVE 611
encoder
© Siemens AG 2008 All Rights Reserved
Industry Automation
02.07
05.01
L +
24 V
DC
L- -
e.g. at terminal X131
of the NE module
≤ 40 m
+86-755-8660-6182