PDP-4280HD
75
5
6
7
8
5
6
7
8
C
D
F
A
B
E
5.6.2 SPECIFICATION OF THE FAN CONTROL
The internal fan cools down the MTB and Power blocks.
• The operating temperature of the fan is higher than the ambient temperature, because the sensor temperature is read by
the microcomputer.
• If the critical values for signals are displayed in the address circuit, the fan may be activated or be rotated at higher speed
in response to values lower than the set temperature values shown above.
DIGITAL Assy
IO Assy
If an emergency signal is
detected, it will be
transmitted.
The Main microcomputer
controls the IF microcomputer
as a port expander.
FAN_VCC1
Detection of
disconnection
0 to 12 V
TEMP2
FAN_NG1
FAN_ON1
FAN_CONT1
MAIN Assy
HIGH
DAC output
Shutdown caused
by high temperature
LOW
STOP
32 ºC
35 ºC
37 ºC
40 ºC
62 ºC
FAN_I_REG
VOLTAGE
CONTROL
TEMP2
Internal fan
IF_Ucom
Main_Ucom
Module_Ucom
R
Block diagram
Operation specifications
Notes:
Summary of Contents for PDP-4280HD
Page 10: ...PDP 4280HD 10 1 2 3 4 1 2 3 4 C D F A B E 2 2 SPECIFICATIONS Dimensions ...
Page 11: ...PDP 4280HD 11 5 6 7 8 5 6 7 8 C D F A B E 2 3 PANEL FACILITIES Front Section ...
Page 12: ...PDP 4280HD 12 1 2 3 4 1 2 3 4 C D F A B E Rear Section ...
Page 13: ...PDP 4280HD 13 5 6 7 8 5 6 7 8 C D F A B E Remote Control Unit ...
Page 19: ...PDP 4280HD 19 5 6 7 8 5 6 7 8 C D F A B E ...
Page 20: ...PDP 4280HD 20 1 2 3 4 1 2 3 4 C D F A B E 4 BLOCK DIAGRAM 4 1 OVERALL WIRING DIAGRAM 1 2 ...
Page 22: ...PDP 4280HD 22 1 2 3 4 1 2 3 4 C D F A B E 4 2 OVERALL WIRING DIAGRAM 2 2 ...
Page 23: ...PDP 4280HD 23 5 6 7 8 5 6 7 8 C D F A B E ...
Page 35: ...PDP 4280HD 35 5 6 7 8 5 6 7 8 C D F A B E ...
Page 168: ...PDP 4280HD 168 1 2 3 4 1 2 3 4 C D F A B E 10 6 PANEL CHASSIS SECTION ...
Page 172: ...PDP 4280HD 172 1 2 3 4 1 2 3 4 C D F A B E 10 8 PDP SERVICE ASSY 428 Exterior Section ...