Kontron CP6-BP4-PB-RIO - Manual (Page 7)

CPCI Backplane PD18: CP6-BP4-PB-RIO
RID 24229 PD18, Rev. 01 © 2003 PEP Modular Computers GmbH Page 7
5.2 Fan Connectors
The backplane can be optionally equipped with two connectors for supplying power for fans
and for connecting a fan speed control device. JP21 (FAN1), is a 3-contact male connector
which supplys +12V for fan operation as well as the possibility to connect to a speed control
device for regulating air flow within the system sub-rack. JP22 (NTC1), is a 2-contact male
connector which provides a separate connection for a speed control device and is designed to
be used in conjunction with JP21.
For fans that have their own speed control or where no control is required, pins 1 and 2 of
JP21 can be used. For external speed control of fans, pins 2 and 3 of JP21 and pins 1 and 2
of JP22 are used. Pin 3 of JP21 and pin 2 of JP22 are connected internally on the board side
to each other.
External air flow regulation can be accomplished using a negative thermal coefficient (NTC)
device connected to JP22.
Figure 3: Orientation and Pinouts of Connectors JP21 and JP22
JP21
JP22
1
2
3
1
2
Table 2: Pinout of JP21 Connector
Pin Function
1 GND
2 +12V
3 NTC1/2
Table 3: Pinout of JP22 Connector
Pin Function
1 GND
2 NTC1/2