Meiko Computing Surface CS-2, Manual

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S1002–10M128.02
5
External Connections
Two 3 pin connectors are provided for Meiko engineering use. They are used for
bench testing of the board, and allow power and diagnostic RS232 connections
to be made.
MK516 SCSI Cards
Transfers up to 5 SCSI buses from the processor module backplane to external
connectors. Five ribbon cable connectors transfer the buses to disk devices
mounted within the module, and one Beta Phase connector connects with exter-
nally mounted devices.
Field Upgradeable Components
The MK516 has the following field upgradeable components:
•
Fuses
•
Termination resistors
The fuses should only be fitted if on-board SCSI bus termination is used (rarely).
Fuses are 125 V, 2 A micro 273 series. The termination resistors must be soldered
in place — there are 3 SIL packages for each bus, each package is an 8 pin, 6
terminal 220/330 R device.