| Item no | Wiew Picture | Model No | Specification | User Manuel | 
  
    
      | VS-4X-EC
VS-8X-EC | 
           | DIO Expansion Card | 4 DI/8 DI (DC 24V); output by screw-clamp terminaL | 
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      | VS-4Y★-EC | 
 | DIO Expansion Card | 	4 DO ★; output by screw-clamp terminal | 
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      | VS-8YT-EC | 
 | DIO Expansion Card | 8 DO (DC 24V, 300mA NPN transistor); output by screw-clamp terminal | 
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      | VS-4XY★-EC
VS-8XY★-EC | 
 | DIO Expansion Card | 2 DI/4 DI(DC 24V); 2 DO ★/4 DO ★; I/O by screw-clamp terminal | 
             | 
    
      | VS-8XI-EC | 
 | DIO Expansion Card | 8 DI (DC 24V); input by IDC connector | 
 | 
    
      | VS-8YTI-EC
VS-8TC | 
 | DIO Expansion Card | 8 DO (DC 24V, 100mA NPN transistor); output by IDC connector | 
 | 
    
      | VS-485-EC
VS-D485-EC | 
 | Comm. Expansion Card | 	One/Dual non-isolated RS-485 port with TX / RX indicators; dist. 50m Max. | 
 | 
    
      | VS-485A-EC
VS-D485A-EC | 
 | 	Comm. Expansion Card | 	One/Dual isolated RS-485 port with TX / RX indicators; dist. 1000m Max. | 
 | 
       
      | VS-D232-EC | 
 | Comm. Expansion Card | 	Dual non-isolated RS-232 ports with TX / RX indicators;
distance: 15m Max.; wiring by the RX / TX / SG terminals | 
 | 
         
      | VS-3AV-EC | 
 | Special Function Expansion Card | 	Brief Voltage I/O Card: 2 channel (0~10V, 12-bit) inputs; 1 channel (0~10V, 10-bit) output; with a calibrated DC 10V output; non-isolated | 
 | 
         
      | VS-4AD-EC | 
 | Special Function Expansion Card | 	Analog Input Card: 4 channel (12-bit) inputs, each channel could output either -10~+10V, 4~20mA or -20~+20mA; non-isolated | 
 | 
         
      | VS-2DA-EC | 
 | Special Function Expansion Card | Analog Output Card: 2 channel (12-bit) outputs, each channel could input either -10~+10V, 4~20mA or -20~+20mA; non-isolated | 
 | 
       
      | VS-4A-EC | 
 | Special Function Expansion Card | Analog I/O card: 2 channel (12-bit) inputs + 2 channel (12-bit) outputs, each channel could input/output either -10~+10V, 4~20mA or -20~+20mA; non-isolated | 
 | 
          
      | VS-3ISC-EC | 
 | Special Function Expansion Card | Inverter Speed Control Card: 3 channel (0.1% resolution) voltage outputs; totally isolated for each channel | 
 | 
          
      | VS-2TC-EC
VS-4TC-EC | 
 | Special Function Expansion Card | Thermocouple Temperature Input Card: 2 /4 channel (K, J, R, S, T, E, B or N type thermocouple, 0.2~0.3℃ resolution) inputs; non-isolated | 
 | 
           
      | VS-1PT-EC
VS-2PT-EC | 
 | Special Function Expansion Card | 	PT-100 Temperature Input Card: 1 /2 channel (3-wire PT-100, 0.1℃ resolution) input; non-isolated | 
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