The programmable control panel has various ports in the rear panel, including Lopping port, RS232 port, RS485 port, IR port, Relay port and Power port. Below is the introduction: 

① Power connector: 12VDC. Be sure that the “+” and “-” never be mixed or wrong connection. 

② Low-Voltage relay ports: set the relay on/off by software GF-PR8. 

③ This port includes: RS232 (1)/IR2, IR1 and RS485.  RS232 (1)/IR2: share the same port, the detailed use depends on the setting of gf-pr8. When be used as RS232, it is unidirectional transmission, transmit data but without receive. 

 IR1: for control other devices, it can be programmable by the gf-pr8 

RS485: the RS485 can be programmed as different commands and control the device with RS485 port. The command of RS485 is the same as RS232