Installation and Configuration
Npaq® Hardware Manual
2.8.1. High-Speed Differential Outputs (J8)
The High-Speed Outputs can be used for general purpose user I/O or as special firmware features (Encoder
Echo and Clock and Direction).
Encoder Echo
The High-Speed Outputs can be used to echo up to three channels of encoder quadrature signals (see
). For more information on echoing encoder signals out of the Npaq, see the ENCODER OUT command
in the A3200 Help file.
Clock and Direction
High-Speed Outputs 11 and 12 (pins 7 through 10) can be used as clock and direction outputs for driving an
external device. For more information on using clock and direction outputs with the Npaq, see the
PULSE command in the A3200 Help file.
Table 2-31:
High-Speed Differential Output Pins on the High-Speed I/O Connector (J8)
Pin #
Description
In/Out/Bi
1
Differential Output 8+ / Sin 1+
Output
2
Differential Output 8- / Sin 1-
Output
3
Differential Output 9+ / Cos 1 +
Output
4
Differential Output 9- / Cos 1 -
Output
5
Differential Output 10+ / Sin 2 +
Output
6
Differential Output 10-/ Sin 2 -
Output
7
Differential Output 11+/Cos2+/Clk +
Output
8
Differential Output 11- /Cos2-/ Clk -
Output
9
(1)
Differential Output 12+ / Sin 3+ / Dir+
Output
10
(1)
Differential Output 12- / Sin 3- / Dir -
Output
11
(1)
Differential Output 13+ / Cos 3+
Output
12
(1)
Differential Output 13- / Cos 3-
Output
(1) These pins are not available to the user when the Analog I/O Board option is installed.
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