Self-Assembly Electronic Kit (Soldering Required)
Simple upgrade kit for our 8-Channel Serial Port Isolated IO Relay Controller that enables you to link two 3108 units together to provide a total of 16 Relay Outputs and 6 external Inputs running from a single serial port.
The Kit consists of two pre-programmed upgrade firmware ICs and two sets of new front and rear box facia panel showing the new I/O numbers.
The Master unit is simply whichever unit the serial cable is connected to. IC7 in both relay boards have to be jumpered (a very simple job) to provide the connection between the kits.