Remote Terminal Unit32 contact inputs RS485 (Modbus-RTU) IEC61000 1. General PZK32 ... . The first register is from register25.- Degree of Protection IP40, Terminal IP20- Isolation 2Kv/1min,50Hz ( inputs, output and supplier)- Work ... ,0x04 to binary is 1000,1110,0000,0100; the channel 19, 25, 26, 27, 32 are NC and others are NO ...