Essential Accessories: PWR12 and SER
These Accessories provide everything you need to begin using your RS232 relay controller.  Accessories needed for this board are a high quality regulated switcher supply and a serial cable (shown below).  These items are available at checkout when purchasing the controller.
Fiber Optic Relay Fiber Optic Relay
12 Volt 1.25 Amp Power Supply
6 ft. Serial Cable