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Ndrive HL User’s Manual
Technical Details
www.aerotech.com 3-3
3.1.1. Secondary Encoder Channel (J205)
The encoder channel can be used as an input for master/slave operation (handwheel) or
for dual feedback systems or for an encoder input/output for multi-axis laser firing (see
Chapter 4 for more information). The EncoderDivider axis parameter configures the
input/output state of this encoder channel. This interface may not be multiplied by the
MXH option and must be a 5-volt RS-422 line driver encoder. It allows up to an 8 MHz
encoder signal (31 nsec. minimum edge separation), producing 32 million counts per
second, after times four (x4) quadrature decoding. The Auxiliary Marker output has a .02
us propagation delay typical, when used as the PSO firing output.
See Table 3-2 for the mating connector part number.
Table 3-3.
Auxiliary Encoder Pin Assignment on Connector (J205)
Pin #
Label
Description
In/Out/Bi.
1
Auxiliary Sine +
Secondary RS-422 Channel - Sine+
Bi-directional
2
Auxiliary Sine -
Secondary RS-422 Channel - Sine-
Bi-directional
10
Auxiliary
Secondary RS-422 Channel -
Bi-directional
11
Auxiliary Cosine -
Secondary RS-422 Channel - Cosine-
Bi-directional
12
+5 Volt
+5 Volt (500mA. max.)*
Output
19
Auxiliary Marker -
Secondary RS-422 Channel - Mrk+ /
PSO out.
Bi-directional
20
Auxiliary
Secondary RS-422 Channel - Mrk- / PSO
out.
Bi-directional
21
Common (+5 Volt )
Common (+5 Volt User Supply)
-
* Total user +5 V power is limited to 500 mA, by an internal re-settable semiconductor fuse.
Figure 3-1.
Secondary Encoder Channel (J205)
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