PDP-4271HD
176
1
2
3
4
1
2
3
4
C
D
F
A
B
E
10.5 SPECIFICATION ABOUT THE THERMAL PROTECTION
This model control the FAN drive by pin 149 (FAN ON / OFF)
and pin 17 (Change of FAN control voltage) of MAIN U-com.
When executing [FCNS00], [FCNS01], [FCNS02] command, detect the FAN_NG signal. When NG is detected,
it becomes shutdown. When [FCNS03] command is executed, FAN_NG detection is not operated.
FAN: HIGH FAN: LO
OFF
H
H
H
L
L
–
Assign
Pin 149
(FAN_CONT)
Pin 17
(FAN_CONT_POW)
∗
The change of HI / LO have hysterisis curve below.
Reading Value of The Sensor and FAN Drive.
T4
(Outside air 131F)
T2
(Outside air 94F)
T1
(Outside air 82F)
T0
(Outside air 77F)
T3
(Outside air 100F)
FAN: STOP
FAN: LO
FAN: HIGH
FAN: LO
FAN: STOP
FAN: LO
FAN: HIGH
SD
Sensor
Temp.
Aims
(Outside Air)
Pin 76
TEMP2
T4 setting
106
268F
131F
T3 setting
142
104F
100F
T2 setting
150
97F
94F
T1 setting
163
86F
82F
T0 setting
170
80F
77F
SD
Low
→
High
High
→
Low
STOP
→
Low
Low
→
STOP
Set State and FAN Drive
Operation when executing FAN control command
[ Outline Circuit ]
Assign
Power
PSW1
State
Fan Operation
ON
ON
ON
According to the reading value of above table sensor.
HIGH or LO
OFF
STB
FAN_CONT: "L"
OFF
Control
REG
FAN_vcc
Vref = 2.64V
H: On
L: Off
Vo
U-COM
17
15
47
33
H : Vo = 11V
L : Vo = 7.6V
149
FAN_CONT
AD Value
8bit
424
566
601
653
679
AD Value
10bit