User guide

SC3500 User Guide Ver 1.3 March 8, 2005 Page 22 of 28
5.5 Termination Power
The SC3500 can supply termination power to the drive and cable by setting the
switch at position E5 on. Normally, the SCSI initiator supplies power for termination.
5.6 Parity
Parity on the SCSI interface can be enabled or disabled by using the parity jumper.
If the jumper is not installed (default), parity is enabled. Installing the parity jumper
disables parity.
5.7 Remote LED
The SC3500 can drive a remote LED by attaching it to the last set of pins on the
jumper block. Note the polarity of the pins as indicated in the jumper block drawing.
5.8 Reserved locations
There are two reserved jumper or switch locations that should never be set. Never
install a jumper in the sixth jumper location, and do not use the drive with switch
setting 7 in the ON position.
5.9 Memory Size
Jumpers are not used to determine the drive’s memory size. The memory size is
determined when the SC3500 is built and preformatted at the factory. With some
SCSI adapter cards the memory size is displayed when the BIOS message is
returned at power up. If that memory size changes, contact Memtech factory repair.
Memory capacity can only be upgraded at the factory.