... E,J,T,B,N RTD:PT100,CU50,CU100linear voltage:0-5V,1-5Vlinear Current:0-10mA,4-20mAAlarm output:R2A:Relay output ... )R2C:Relay output(3A normally open+ normally close)Auxiliary output:S1:Optical isolation RS485 communication S2:Optical isolation RS232 ... communicationP:RS232 printingU1/U2/U3:5V/12V/24V feedFor example: KH105-D-4 ...