Oki B 2400 - Manual (Page 134)

5-26 Service Manual
24xx
Tractor 2 Cable Connectors
The Tractor 2 cable is soldered to the Tractor 2 board at CN1; there
is no connector.
Connector Mode
CN1-1 +26 V dc.
CN1-2 +26 V dc.
CN1-3 Frame GND.
CN1-4 Not used.
CN1-5 +5 V dc.
CN1-6 Motor common.
CN1-7 D-Set (signal for Tractor 2 plugged in).
CN1-8 Signal GND.
CN1-9 Motor phase A; 0 V dc except when Tractor 2 motor is
on.
CN1-10 Motor phase B; +5 V dc when Tractor 2 not in use;
0 V dc when Tractor 2 is in use.
CN1-11 Not used.
CN1-12 Slider home sensor; +5 V dc when open, 0 V dc
when closed.
CN1-13 Tractor 2 in-place sensor; +5 V dc when open,
0 V dc when closed.