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Encoder interface
The encoder interface offers four axes of encoder input to the SPA2-2 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 encoder (maximum input frequency 20 MHz).
NOTE: Connection to single ended encoders is not recommended.
The 5 V supply from the encoder interface has the ability to supply a maximum of 1 A per axis pair.
For connection details please refer to the table below:
Connector pin | Function |
|---|---|
1 | Not connected |
2 | 0 V (from SPA2-2) |
3 | Not connected |
4 | -Ref mark |
5 | -B signal |
6 | -A signal |
7 | +5 V supply from SPA2-2 |
8 | +5 V supply from SPA2-2 |
9 | 0 V (from SPA2-2) |
10 | Not connected |
11 | Not connected |
12 | +Ref mark |
13 | +B signal |
14 | +A signal |
15 | 0 V (from SPA2-2) |
Shell | Screen |