SPA2-2 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