Digital PWM Power Supply, This power supply has 3 types external control (LAN(8 bit parallel)/RS-232C(8 bit parallel)/RS-485(Analog)| STP-LAN/DIO-1230-C2 / STP-LAN/DIO-1230-C4 / STP-LAN/DIO-1230-C8 /STP-LAN/DIO-1250-C2 /STP-LAN/DIO-1250-C4 /STP-LAN/DIO-1250-C8 /STP-LAN/DIO-12100-C2 /STP-LAN/DIO-12100-C4 /STP-LAN/DIO-12100-C8 /STP-LAN/DIO-2430-C2 /STP-LAN/DIO-2430-C4 /STP-LAN/DIO-2430-C8 / STP-LAN/DIO-2450-C2 / STP-LAN/DIO-2450-C4 / STP-LAN/DIO-2450-C8 /STP-LAN/DIO-24100-C2/STP-LAN/DIO-24100-C4/STP-LAN/DIO-24100-C8 / STP-232/DIO-1230-C2 / STP-232/DIO-1230-C4 / STP-232/DIO-1230-C8 /STP-232/DIO-1250-C2 /STP-232/DIO-1250-C4 /STP-232/DIO-1250-C8 /STP-232/DIO-12100-C2 /STP-232/DIO-12100-C4 /STP-232/DIO-12100-C8 /STP-232/DIO-2430-C2 /STP-232/DIO-2430-C4 /STP-232/DIO-2430-C8 / STP-232/DIO-2450-C2 / STP-232/DIO-2450-C4 / STP-232/DIO-2450-C8 /STP-232/DIO-24100-C2/STP-232/DIO-24100-C4/STP-232/DIO-24100-C8 / STP-485/ANG-1230-C2 / STP-485/ANG-1230-C4 / STP-485/ANG-1230-C8 /STP-485/ANG-1250-C2 /STP-485/ANG-1250-C4 /STP-485/ANG-1250-C8 /STP-485/ANG-12100-C2 /STP-485/ANG-12100-C4 /STP-485/ANG-12100-C8 /STP-485/ANG-2430-C2 /STP-485/ANG-2430-C4 /STP-485/ANG-2430-C8 / STP-485/ANG-2450-C2 / STP-485/ANG-2450-C4 / STP-485/ANG-2450-C8 /STP-485/ANG-24100-C2/STP-485/ANG-24100-C4/STP-485/ANG-24100-C8