Floppy Drive Connector (Cn19); Connecting The Floppy Drive - Advantech PCM-9550F User Manual

2.10 Floppy drive connector (CN19)

You can attach up to two floppy drives to the PCM-9550F/FM/L's
on-board controller. You can use any combination of 5.25" (360
KB and 1.2 MB) and/or 3.5" (720 KB, 1.44 MB, and 2.88 MB)
drives.
A 34-pin daisy-chain drive connector cable is required for a
dual-drive system. On one end of the cable is a 34-pin flat-cable
connector. On the other end are two sets of floppy disk drive
connectors. Each set consists of a 34-pin flat-cable connector
(usually used for 3.5" drives) and a printed-circuit board
connector (usually used for 5.25" drives).

2.10.1 Connecting the floppy drive

1. Plug the 34-pin flat-cable connector into CN19. Make sure that
the red wire corresponds to pin one on the connector.
2. Attach the appropriate connector on the other end of the cable
to the floppy drive(s). You can use only one connector in the
set. The set on the end (after the twist in the cable) connects to
the A: drive. The set in the middle connects to the B: drive.
3. If you are connecting a 5.25" floppy drive, line up the slot in
the printed circuit board with the blocked-off part of the cable
connector.
If you are connecting a 3.5" floppy drive, you may have
trouble determining which pin is number one. Look for a
number printed on the circuit board indicating pin number one.
In addition, the connector on the floppy drive may have a slot.
When the slot is up, pin number one should be on the right.
Check the documentation that came with the drive for more
information.
If you desire, connect the B: drive to the connectors in the
middle of the cable as described above.
In case you need to make your own cable, you can find the pin
assignments for the board's connector in Appendix C.
2 0 PCM-9550F/FM/L User's Manual