Baldor FDH1A05TB-EN20 Installation Manual page 67

Encoder
4.4.2.1 Dual encoder feedback
The master encoder input can be used as a second feedback input in dual encoder systems.
The Mint keyword AXISPOSENCODER is used to select the master (auxiliary) encoder input as
a feedback input. See the Mint help file for details.
4.4.2.2 Pulse and Direction following
The master encoder pulse and direction inputs accept 5V differential line driver (RS422)
signals from an external source. The pulse frequency controls the speed, and the state of the
direction signal controls the direction of motion. A positive direction voltage (greater than
200mV) will result in motion in one direction. A negative direction voltage (less than -200mV)
will result in movement in the opposite direction.
The Mint keyword AUXENCODERMODE (bit 2) is used to configure X9 for pulse and direction
operation. If necessary, the sense of the direction input can be reversed in software using the
Mint keyword AUXENCODERMODE (bit 0). See the Mint help file for details.
Note: If X9 has been configured for pulse and direction input, the alternative pulse and
direction inputs, available on connector X3, cannot be used. See the Mint keyword
MASTERSOURCE.
4-14 Input / Output
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Master
Connect overall shield
to connector backshells.
Figure 37 - Differential encoder connections
Pulse and direction
source
Pulse
Direction
Connect overall shield
to connector backshells.
Figure 38 - Pulse and direction connections
Twisted pairs
Twisted pairs
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X9
CHA+
1
CHA- -
6
CHB+
2
7 CHB- -
CHZ+
3
CHZ - -
8
+5V
9
DGND
5 Connect internal
shields to DGND.
X9
1 Pulse +
6 Pulse - (GND)
2 Direction+
7 Direction - (GND)
5 DGND Connect internal
shields to DGND.
MN1902