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3.5 Encoder interface card
The encoder interface card offers four axes of encoder input to the SPA 2 system, each being a 15-way
high-density D-type connector, designed for digital tacho (encoder) input.
The encoder interface is designed to accept signals from an RS422 compliant encoders.
NOTE: Connection to single ended encoders is not recommended.
The 5 V supply from the encoder interface card has the ability to supply a maximum of 1 A in total.
For connection details please refer to the table below:
Connector pin
Function
1
Not connected
2
0 V (from SPA 2 )
3
Not connected
4
-Ref mark
5
-B signal
6
-A signal
7
+5 V supply from SPA 2
8
Not connected
9
0 V (from SPA 2 )
10
Not connected
11
Not connected
12
+Ref mark
13
+B signal
14
+A signal
15
0 V (from SPA 2 )
Shell
Screen
Rear panel description
21
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