Enhanced SCSI-2 Differential Fast/Wide Adapter/A
Type 4-C #2412

Filesets: devices.mca.8efc.* 
Latest Adapter Microcode for 4-C #2412

                                    50-pos
        _____________________  _______   ______    _________||
       |                    |_|||||||||_||||||||__|         ||_
       |  93H7896 #2412         ___68-pos J1___          _  || |
       |( 52G3380 )            |_______________|        |1| || |
       |  FFC 890                                     _ |_| || | 68-position
       |                                             |1| _  || |
       |                                             |_||1| || |
       |                                                |_| ||_|
       |_______________          _     _           _____    ||
                       |||||||||| ||||| |||||||||||     |___||

                      J2, J5 and J6 are not used
        1-  Terminating Resistors..........  42G3326
               (removed for High-Availability)

              TR1 Internal Bus PTC resistor ( >1/2 ohm )
              TR2 External Bus PTC resistor ( >1/2 ohm )



      This adapter consists of two independent SCSI-2 Fast/Wide controllers

         * One controller is used for the internal SCSI bus, supporting
           single-ended internal connections only. The internal bus can be
           cabled as either wide(16-bit) or narrow(8-bit).

         * The other controller is used for the external SCSI bus and supports
           differential connections only. The external bus can be cabled as
           either wide(16-bit) or narrow(8-bit).

      This adapter will support attachment of both wide and narrow devices on
      a wide bus, or an attachment of only narrow devices on a narrow bus.

      Length of differential bus: 25m (82ft).

      Attach only differential devices on the external bus and single-ended
      devices on the internal bus.




                          Cabling with narrow devices

     ___________====___               _____________          _____________
    | 93H7896 Type 4-C |------1------| 2-Connector |       3| 2-Connector |
    | ESCSI-2 DI FW    |             | SCSI Device |        | SCSI Device |
    |_______      _   _|        .----| Narrow 8bit |   .----| Narrow 8bit |
            |||||| |||          |    |_____________|   |    |_____________|
                                '---------2------------'


   __________________________________________________________________________
  |                                          |            |         |        |
  |    Cable Description                     |    FC#     |   PN    | Length |
  |__________________________________________|____________|_________|________|
  | 1- Adapter-to-Dual-Connector-Device      |            |         |        |
  |     8-bit narrow bus.................... | 2438       | 88G3636 | 1.5m   |
  |__________________________________________|____________|_________|________|
  | 2- Device-to-Device narrow bus 8-bit     |            |         |        |
  |     7204-215-to-7204-215................ | 2848, 9134 | 74G8511 | 0.6m   |
  |__________________________________________|____________|_________|________|
  | 3- Terminator 50-pin lo-density narrow   | 2847, 9133 | 87G1356 |  N/A   |
  |__________________________________________|____________|_________|________|

      NOTE:  For 9334-011/501 and 7134/7135 see these devices in Devices
                          Cabling with wide devices

     ___________====___               ___________            ___________
    | 93H7896 Type 4-C |------1------| 2-Connect.|         T| 2-Connect.|
    | ESCSI-2 DI FW    |             | SCSI Wide |          | SCSI Wide |
    |_______          _|        .----| Device    |     .----| Device    |
            ||||||||_|          |    |___________|     |    |___________|
                                À---------2------------Ù


    _________________________________________________________________________
   |    Cable Description                     |    FC#    |   PN    | Length |
   |__________________________________________|___________|_________|________|
   | 1- Adapter-to-Dual-Connector-Device      |           |         |        |
   |     16-bit wide bus..................... | 2436      | 52G4337 | 1.5m   |
   |__________________________________________|___________|_________|________|
   | 2- Device-to-Device Wide Bus 16-bit..... | 2845/9131 | 52G4291 | 0.6m   |
   |                                          | 2846/9132 | 52G4233 | 2.5m   |
   |__________________________________________|___________|_________|________|
   | 3- Terminator 68-pin wide bus 16-bit.... | 2847/9133 | 61G8324 |  N/A   |
   |__________________________________________|___________|_________|________|
      NOTE:  For 9334-011/501 and 7134/7135 see these devices in Devices


      
                                 High Availability

   ___________====___   .-- T3                     3T --.   ___====___________
  | 93H7896 Type 4-C |--|                               |--| 93H7896 Type 4-C |
  | ESCSI-2 DI FW    |  '-1-| |----2---. .----2---| |--1'  | ESCSI-2 DI FW    |
  |_______          _|             ____|_|____             |_          _______|
          ||||||||_|              |2-Connector|              ||||||||_|
                                  |SCSI Drive |
                                  |___________|



   __________________________________________________________________________
  |     Part Description                          |   FC  |   PN    | Length |
  |_______________________________________________|_______|_________|________|
  |  1- Y-Cable.................................. | #2426 | 52G4234 | 0.94m  |
  |_______________________________________________|_______|_________|________|
  |  2- Cable (Y-Cable-to-device)................ | #2424 | 52G4291 | 0.6 m  |
  |                                               | #2425 | 52G4233 | 2.5 m  |
  |_______________________________________________|_______|_________|________|
  |  3- Terminator, differential (wide 16-bit)... |       | 61G8324 | N/A    |
  |_______________________________________________|_______|_________|________|


  



      
                      Optional Internal Cabling
      __________________________________________________1__________
    _|_       |                 |           |    |                 |
     3        |                 |           :    :                 |
       _______|________  _______|________   :    :    ___________====___
      |  Wide Device   ||  Wide Device   |           | 93H7896 Type 4-C |
      |________________||________________|           | ESCSI-2 DI FW    |
                                                     |_______          _|
                                                             ||||||||_|


  ____________________________________________________________________________
 |                                                |      |                    |
 |                 Cable Description              |  FC  |  P/N for Mach/Type |
 |________________________________________________|______|____________________|
 |                                                |      |                    |
 | Internal SCSI cable                            |      |                    |
 |   Using the 68-pin internal connector          |      |                    |
 |      7013 - 16-bit Wide 6-drop                 | 2431 | 52G4430            |
 |                                                |      |                    |
 |   Using the 50-pin internal connector          |      |                    |
 |      7013 - 8-bit Narrow 6-drop                | 2430 | 52G7451            |
 |________________________________________________|______|____________________|
 |                                                |      |                    |
 | 3- Terminator: Wide........................... |      | 92F0322            |
 |________________________________________________|______|____________________|

Last update Jan 2003