Baldor MicroFlex e100, Installation Manual

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Feedback 4-13 MN1942
4.1.5 EnDat (absolute encoder) feedback
The absolute encoder interface supports both incremental and absolute (multi and single turn)
feedback using EnDat technology. It is possible to read and write information to the encoder.
The absolute encoder connections are made using the 15-pin D-type female connector X8.
Twisted pair cables must be used for the complementary signal pairs e.g. Sin+ and Sin-. The
overall cable shield (screen) must be connected to the metallic shell of the D-type connector.
Connector X8 includes a ‘Sense’ pin, which is used to detect the voltage drop on long cable runs.
This allows the MicroFlex
e
100 to increase the encoder supply voltage on pin 12 to maintain a
5 V supply at the encoder (200 mA max). Version 2.2 EnDat encoders do not use the Sin and
Cos channels.
Pin Absolute encoder function
1 Data+
2 Clock+
3
(NC)
4 Sense
5 Sin-
6 Sin+
7 Cos-
8 Cos+
9 Data-
10 Clock-
11
(NC)
12 +5 V out
13 DGND
14
(NC)
15
(NC)
Data+
Data-
Cos-
Cos+
1
9
7
8
5
6
X8
Absolute
Encoder
Sin-
Sin+
Twisted pairs
10
2
Clock-
Clock+
13 DGND
12 +5 V out
Connect overall shield
to connector backshells.
Connect internal
shields to DGND.
Motor
4
Sense
Figure 25 - Absolute encoder cable connections
1
8
9
15