1. Description 

○ Digital Broadcasting unit is a card type control device for large capacity
    equipment.  

○ It is composed of main self which CPU and power supply are allocated. Each
    card unit works as communication control (RS-232C/ RS-422), input/output,
    volume up/down and IR control.  

○ Maximum 11 cards can be installed in main shelf and it can be composed by
    expanding shelves.

○ Cards from main shelf can be replaced any moment if necessary, so it is 
    possible to provide fast after sales service. 
 

  
2. Panel Drawing

3. Specification 

○ Main Shelf 【MDBU-301MAIN】
  - Main Shelf  (1) Board Rear Insert Type
                       (2) Number of Card : 11EA Card
                       (3) Case
                         . Enclosure Type : Aluminum
                         . Type : 19" Rack Type
                         . Dimensions : 483(W) * 133.5(H) * 300(D) mm  
  - Power Supply (1) Supply power to each card which is inserted into
                                 MDBU(301MAIN)
                           (2) Input Power : AC 85V ~ 246V Free Volt
                           (3) Output Power : DC +12V, DC -12V  
  - CPU (1) CPU card takes data from MDBU-301Main and processes to
                  manage MDBU-300S comprehensively.
            (2) Features : Communicate between cards in MDBU-301main
               . CPU : 80C52
               . Memory : 32K
               . Serial Port : RS-232 (RS-422: need to be adjusted) 2 Port
               . 2Port의 Serial Port (integrated control by computer and key pad,
                                                enable to be linked with additional devices)
            (3) MDBU-301Main Front Led Display  

○ Com Card 【MDBU-302COM】
    Interface device between main unit and external communication devices 
    which takes data from
    CPU card and transmits to the specific port.
  -  Features (1) Serial port : RS 232C 3 port (RS-422: need to be adjusted)
                          D-SUB connector with 3 each card is available at rear panel
                          (extension slot available)
                    (2) CPU : 80C52
                    (3) Memory : 32K
                    (4) additional card available for extension  

○ Input Card 【MDBU-303IN】 
   Transmission card which takes specific data of contact, sensor, power and
   sends to CPU card. 
  -  Features (1) number of contact point : 16 Port
                     (2) additional card available for extension
                     (3) CPU : 89C52

○ Output Card 【MDBU-304OUT】 
    Transmission card which takes data from CPU and sends to specific external
    devices via contact point.
  -  Features (1) number of contact point : 9 Port
                    (2) additional card available for extension
                    (3) output power : DC 24V 1A 

○ IR Card 【MDBU-305IR】 
    control card for devices which are operated by remote controller such as
    VTR, DECK, DVD 
  - Features (1) IR Port : 4 Port (IR and Serial Control)
                    (2) additional card available for extension
                    (3) CPU : 80C52

○ Volume Card 【MDBU-306VR】 
  -Volume control card adjusts the level of volume for remote controlled devices
    by connecting amplifier.
  -Controls the level of volume via touch screen(operating software) or key pad by
    taking data from main control CPU. 
  - Features (1) number of volume control port : 3port (M : 1ch, ST : 2ch)
                    (2) additional card available for extension of control channel
                    (3) CPU : 89C52

○ LAN Card 【MDBU-307LAN】
    LAN card enables to manage MDBU-300S generally. It receives card data and
    processes.
   -  Features : (1) CPU: 89C52
                        (2) Memory : 32K
                        (3) Serial Port : RS-232 (or RS-422 Setting) 2 Port
                        (4) 2 Port의 Serial Port (1Port 232 / 1Port )
                        (5) Protocol : TCP/UDP/IP/ICMP/ARP/TELNET/DHCP
                        (6) Lan : 10Base-T Ethernet  

○ W/L Lan Card [MDBU-307Wlan]       
    W/l LAN card enables to manage MDBU-300S generally. 
    It receives card data and processes
   - CPU : 89C52
   - Memory : 32K
   - Serial Port : RS-232 (or RS-422 Setting) 1Port
   - IEEE802.11b wireless LAN support
   - Protocol : TCP/UDP/IP/ICMP/ARP/TELNET/DHCP
   - Lan : 10 Base-T Ethernet