Fan Control Module (Fcm) - Schroff CPCI PICMG 2.16 Benutzerinformation

3.2 Fan Control Modul (FCM)
The Fan Control Module, based on a microcontroller, monitors up
to 4 DC fans rotation speed depending on the temperature.
Up to 4 temperature sensors (NTC) can be connected.
It controls the theoretical speed value of each fan.
If the fan speed falls below the theoretical value or by cable
damage or by temperature sensor cable short-circuit, an alarm is
generated and the fans rotate at their maximum speed.
The FCM has a CMM connection (I2C-bus) for remote alarm
signal and for individual configuration of the FCMs.
Block diagram:
υ
NTC 1
υ
NTC 2
µC
υ
NTC 3
υ
NTC 4
Digital input 1
Digital input 2
Digital input 3
Digital input 4
5V Module power
+3.3V monitor in
+12V monitor in
-12V monitor in
Fan speed characteristics:
Fan speed characteristics
Fan speed
(%)
100
60
CPCI PICMG 2.16 10 U
Filter
Fan 1
Fan 2
Driver
Fan 3
Fan 4
I2C bus to CMM
I2C bus
Over Temp digital output
Fan Fail digital output
Over Temp LED
Fan Fail LED
Voltage fail + 5V LED
Voltage fail +3.3V LED
Voltage fail +12V LED
Voltage fail –12V LED
υ (°C)
25
50 60
Over Temp
Alarm
Connectors assignment:
X1:Connector for signals and power supply
Designation Terminal
12V 1
-12V 8
12V 2
-12V 9
3,3V 3
5V 10
GND 11
Temp Fail
4
collector
Temp Fail
5
emitter
Fan Fail collector 6
Fan Fail emitter 7
CMM BUS SCL 13
CMM BUS SDA 12
CMM BUS GND 14
X2:Connector for temperature sensors and digital inputs
Designation Terminal
Digital in1 TTL 7
Digital in2 TTL 8
Digital in3 anode 9
Digital in3
10
cathode
Temp1 + 1
Temp1 - 2
Temp2 + 3
Temp2 - 4
Temp3 + 5
Temp3 - 6
10002501
1.6
Fonction
Power for fan;
Current: 3A
Ground for fan
Current: 3A
LED display
LED display
LED display
Power for logic
current: 0,5A
Ground for logic
current: 1A
Signal out
Signal out Ground
Signal out
Signal out Ground
Communication Bus
Communication Bus
Communication Bus
Fonction
Signal in
Signal in
Signal in
Signal Ground
Temp sensor
Temp sensor
Temp sensor
Temp sensor
Temp sensor
Temp sensor