Installation guide
Appendix B – Automatic Bumpers          99 
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AMF (and others) Automatic Bumpers 
The Majority of Automatic Bumpers can be activated up or down by the closure of a switch. The Duo Units 
include a relay for this purpose. The contacts for this replay can be found on pins 4 and 12 of the Machine 
Connection plugs for both the Odd and Even lanes. Run the Automatic Bumper Connection cable (SBC) from the 
Duo Hardware Unit to the Automatic Bumper Controller for your bumpers. 
Note:  The relay on the Duo Unit will only handle the switching of low voltage (or 
preferably no voltage) only.  DO NOT attempt to place any high voltage 
across the relay contacts or you WILL DAMAGE the Duo unit.  If you are 
unsure  how  to  connect  your  Automatic  Bumpers,  contact  the 
manufacturer of the bumper units. 










