Npaq® Hardware Manual
Installation and Configuration
2.8. High-Speed I/O Connector (J8)
The High-Speed I/O port (J8) is a 25 pin ‘D’ style connector located on the Rear Panel Interface board and is
accessible at the rear of the Npaq chassis. These devices have high data rates and low delay times. There
are six high speed differential outputs (pins 1-12), four high speed differential inputs (pins 13-20) and three
high speed bidirectional I/O lines (pins 21-23).
Table 2-29:
High-Speed I/O Connector Pinout (J8)
Pin #
Description
In/Out/Bi
Connector
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
13
Differential Input 17+ / Aux Encoder 1 Sin +
Input
14
Differential Input 17- / Aux Encoder 1 Sin -
Input
15
Differential Input 18+ / Aux Encoder 1 Cos +
Input
16
Differential Input 18- / Aux Encoder 1 Cos -
Input
17
(1)
Differential Input 19+ / Aux Encoder 2 Sin +
Input
18
(1)
Differential Input 19- / Aux Encoder 2 Sin -
Input
19
(1)
Differential Input 20+ / Aux Encoder 2 Cos +
Input
20
(1)
Differential Iinput 20- / Aux Encoder 2 Cos -
Input
21
(1)
Input 14 / Output 14
Bidirectional
22
(1)
Input 15 / Output 15
Bidirectional
23
Input 16 / Output 16
Bidirectional
24
Common
N/A
25
+5 Volts (Fused) (500 mA max)
Output
(1) These pins are not available to the user when the Analog I/O Board option is installed.
Table 2-30:
Mating Connector Part Numbers for the High-Speed I/O Connector
Mating Connector
Aerotech P/N
Third Party P/N
25-Pin D-Connector
ECK00101
FCI DB25P064TXLF
Backshell
ECK00656
Amphenol 17E-1726-2
64
Chapter 2
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