... input,contact switch,encoder(NPN PNP) to used with available;widely used in line of machinery,food,package,etc for measuring not ... when ordering.5,RS232 or RS485 Modbus RTU protocol,connectable with various equipment,computer or PLC directly.6,Power supply: ... service offer, Buyer laber offer. Tel: 086-0760-23609691 Fax: 086-0760-23609692 Phone: 086-13217608016(Barbara Guo) 86-13435730867(Peter Liao)