Type classification              
   MD-911 - SS  A 1 - Type 2 - Knob   3 - Special feature      
          1      2    3 910 : 24 columns SS : no knob   None : regular model    
    911 : 40 columns HS : horizontal knob   A - cold temperature model    
      VS : vertital knob            
           
 
 
  MD-911    Accessories:      
      Features:    Control board : CBM-909-4D    
      - Compact design  
 
   Interface  Parallel and serial  
      - Light weight        Number of columns  40 columns  
      - 5 V operation        Font  4 x 7 (including half dot)  
      - Number of columns: 24         Command set  Unique  
      - Knob model (type V or H)        Firmware location  Masked CPU  
               Buffer size  1 line  
   Specification            Supporting devices  LF switch, On-line switch  
   Printing method    Serial impact dot printing        Dimensions  80 x 55.5 mm  
   Printing directions  One-way printing        Source voltage  4.0 +0.7/-1 V  
   Printing speed    Approx. 1.8 lines/s        Custom control chip  909PC-4DU  
   Number of columns  40 columns, 180 dots/line    Control chip :  909PC-4DU    
   Font    4 x 7 matrix  
 
     
   Number of wires    8 wires (4 pins x 2 heads)          
   Character size (W x H)  Approx. 1.1 x 2.4 mm            
   Character pitch    1.17 mm (interval of columns)            
       3.52 mm (interval of lines)   Paper winder : AW-5    
   Motor    Voltage: 5.0 V /peak current  
 
       
       1A, average current 0.3 A/            
   Dot pulse sensor  Photo interrupter            
   Home pulse sensor  Leaf switch            
   Printing solenoid    5 V DC, resistance 1.7 Ω            
   Paper feeding solenoid  5 V DC, resistance 9 Ω            
   Connecting method  Copper foil patterns, 2.54 mm            
   Driving voltage    3.5 - 5.5 V DC    Ink ribbon :     IR-91B (black), IR-91P (purple), IR-91L (long life)  
   Printing paper    57.5 +/-0.5 mm  
 
       
   Copy    Original print + 1 copy          
   Ink ribbon    IR-91(B-black or P-purple)            
   Paper feeding speed  Approx. 3.6 lines/s            
   External dimensions (W x D x H)  90 x 45.5 x 16 mm            
   Weight    105 g          
   Operating temperature  0 - 50°C          
   Storage temperature range  -25 - 75°C          
   Reliability   MCBF: 1.0 million lines