Installation and Configuration
Npaq MR Hardware Manual
2.6. Aux Encoder
The auxiliary encoder interface accepts a RS-422 differential quadrature line driver signal. This encoder
channel can be used as an input for master/slave operation (handwheel), for dual feedback systems, or as
an output to echo the standard encoder signals.
The auxiliary encoder channel can also be used as the PSO output. Configuring the PSO hardware will
automatically configure this encoder channel as an output (refer to
) and will remove the 180
ohm terminator resistors.
The auxiliary encoder interface does not support analog encoders and thus cannot be used as an input for the
-MXU or -MXH option in MP and ML drives.
This connector is installed only if the -IO option has been ordered for the axis.
Table 2-28:
Aux Encoder Specifications
Specification
Value
Voltage
5 VDC
Encoder Frequency
10 MHz maximum (25 nsec minimum edge separation)
x4 Quadrature Decoding
40 million counts/sec
Table 2-29:
Auxiliary Encoder Channel Pin Assignment
Pin#
Description
In/Out/Bi
Connector
1
Auxiliary RS-422 Encoder Sine +
Bidirectional
1
5
6
9
2
Auxiliary RS-422 Encoder
Bidirectional
3
Auxiliary RS-422 Marker Pulse +/ PSO Output
(1)
Bidirectional
4
E5 Volt Power
Output
5
Encoder Power Common
N/A
6
Auxiliary RS-422 Encoder Sine -
Bidirectional
7
Auxiliary RS-422 Encoder Cosine -
Bidirectional
8
Auxiliary RS-422 Marker Pulse - / PSO Output
(1)
Bidirectional
9
Encoder Power Common
N/A
(1) For PSO, see
Section 2.6.1. Position Synchronized Output (PSO)/Laser Firing
Mating Connector
Aerotech P/N
Third Party P/N
9-Pin D-Connector
ECK00137
Cinch DE-9P
Backshell
ECK01021
Amphenol 17-1724-2
www.aerotech.com
Chapter 2
45
