4 Connection 
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4.2  I/O card 
Universal input card [KRN-UI2] 
Digital input card [KRN-DI6] 
 
※Each channel is isolated and dielectric 
strength is 500 V. 
 
Alarm output card   
[KRN-AR4(relay output)] 
Alarm output card   
[KRN-AT 6( transistor output)] 
 
 
※AL1,2,3 and AL4,5,6 are isolated. 
Transmitter power output card   
[KRN-24V3] 
Communication output card [KRN-COM] 
 
※24V output of 3EA is isolated individually.