3028

3028 is the BEX, bus expander.

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Introduction

What does it do?

Switches and indicators

• Allow switch
• Vital switch
• Vital on / off indicator
• Thumbwheel 1 - BEX no. thumbwheel switch
  • 0 : Dev. No. 1000000, Int. Level 13, Ident. Code 10
  • 1 : Dev. No. 1000004, Int. Level 13, Ident. Code 11
  • 2 : Dev. No. 1000010, Int. Level 13, Ident. Code 12
  • 3 : Dev. No. 1000014, Int. Level 13, Ident. Code 13
  • 4 : Dev. No. 1000020, Int. Level 13, Ident. Code 14
  • 5 : Dev. No. 1000024, Int. Level 13, Ident. Code 15
  • 6 : Dev. No. 1000030, Int. Level 13, Ident. Code 16
  • 7 : Dev. No. 1000034, Int. Level 13, Ident. Code 17

Note: BEX No. 0 is defined as MASTER BEX and should be placed in the A crate.

• Base setting display
• Upper limit display
• Lower limit display
• Base address switches
• Upper limit switches
• Lower limit switches

For Base, Upper and Lower limit switches: the most-significant switch is topmost, and the least-significant switch is closest to the bottom of the card. On each BEX connected to a crate containing memory, the limit switches are used to specify the memory area covered by the crate. These values could also be set by a program.

Connectors

The A and B connectors are used for I/O, the C connector is used for the ND-100 Bus.

I/O Devices on the card

none?

References

• Norsk Data Document ND–30.008.3 EN ND-100 Hardware Maintenance , page 201