4115T Light Duty Industrial PC Chapter 3 – POS-478 CPU Control Board and BIOS Setup
21 143926(A)
Connector Pin Outs
The following describes how to connect peripherals, switches and indicators to POS-478 board.
Floppy Disk Drive Connector
POS-478 board is equipped with a 34-pin daisy-chain drive connector cable.
FDD1: FDD Connector
PIN Description
PIN
Description
1 GROUND 2 REDUCE
WRITE
3 GROUND 4 N/C
5 GROUND 6 N/C
7 GROUND 8 INDEX#
9
GROUND
10
MOTOR ENABLE A#
11
GROUND
12
DRIVE SELECT B#
13
GROUND
14
DRIVE SELECT A#
15
GROUND
16
MOTOR ENABLE B#
17 GROUND 18 DIRECTION#
19 GROUND 20 STEP#
21 GROUND 22 WRITE
DATA#
23 GROUND 24 WRITE
GATE#
25 GROUND 26 TRACK
0#
27 GROUND 28 WRITE
PROTECT#
29 GROUND 30 READ
DATA#
31
GROUND
32
SIDE 1 SELECT#
33 GROUND 34 DISK
CHANGE#
