Service manual

3. Electrical Parts
3-25
SG06027
SDG125S/150S-6A6-
List of functions
Pin No.
Line
color
Connection Function
CN6-1 Y/R Manual-Auto selector switch
Power for XO relay of remote start /stop switch.
With auto start unit No.1 terminal electrically
conducted, when remote start/stop switch (exterior
output terminal plate between A1-
A
2 terminals) is
switched ON, XO relay begins to function.
CN6-2 W Tachometer No.2 terminal
Power for hour meter functioning signal.
When the engaging (starting) signal from starter
motor is given to CN7-4 terminal, X1 relay
functions, and voltage is applied to PLC unit X1
terminal. And then the interior contact of Y4
terminal becomes ON.
Consequently, the hour meter starting signal is
outputted to tachometer No.2 terminal from auto
start unit No.2 terminal.
CN6-3 L/R Starter relay No.2 terminal Overrun prevention circuit of starter motor.
CN6-4 - NIL
CN6-5 Y/W
Remote start/stop switch
(Exterior output terminal plate
via A1 terminal)
Remote start/stop switch connecting terminal.
When remote start/stop switch is switched ON with
auto start unit No.1 terminal electrically connected,
XO relay functions. Consequently, the relay will be
switched ON and then electricity is supplied to PLC
unit through DC12V-DC24V converter (DC1).
Further, voltage is applied to PLC unit XO
terminal, and the interior contact becomes ON 2
seconds later (pre-heating starts) and the interior
contact of Y3 terminal becomes ON after 4 seconds
(starter motor begins cranking) and engine starts.
When remote start/stop switch is switched OFF, XO
relay switch is also switched OFF, but electricity is
supplied 5 seconds from PLC unit P3 terminal to
PLC unit itself, engine will stop after the interior
contact between P1-P3 terminals becomes OFF
after ５seconds engine cooling down operation.
When the emergency stop button on operation
panel is pressed, power supply to auto start unit
No.6 terminal is cut, and engine stops immediately.
CONNECTOR