Instruction Manual
Transmitter Input
12V 15 16 17
 Gnd 
AR/t 
Pulse Transmitter 
- black 
+ white 
RTR   
Transmitter Register 
- black 
+ red 
12V 15 16 17
 Gnd 
Reed 
Switch 
 black 
black 
12V 15 16 17
 Gnd 
Regeneration Relay Output
1  2  3  
Common 
Normally closed 
Normally open
5A, 250 VAC / 30 VDC max.  
12-24 AWG  
Suppress inductive loads with 
RC surge suppressor (150 
ohm, 0.25 microfarad, 600 V) 
Model PRC-20 with AR/t or RTRĀ® Water Conditioning Control System
Page 8  April 2013










