SCK measuring module for monitoring photovoltaic 8 inputs for measuring current to 20 A, one digital input, SCK interface for communication module, the communication protocol of the first generation equipment operating temperature: -20 C to 70 C degree of protection: IP20 voltage: via SCK-C MODBUS measures (WxHxD) in mm: 22.5x102x128.5 line SCK-M-R-20A-8S. Phoenix Contact.