Readhead connector (as viewed on the controller rear panel):
Pin number
Function
1
External N/C
2
0 V supply
3
- Error
4
- Reference mark
5
- B signal
6
- A signal
7
+5 V supply
8
Reserved
9
Reserved
10
Limit switch Q*
11
Limit switch P
12
+ Reference mark
13
+ B signal
14
+ A signal
15
Inner screen
Shell
Screen
* The UCC MMI is capable of supporting both single and dual limit-switch RG22 readheads. The electronic circuits can interface either type
without any intervention but the correct type must be set in the machine ini file. If dual limit types are fitted pin 11 functions as the second limit
switch.
UCC MMI installation guide
http://www.renishaw.com
Issued 11 2017
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