EXPANSION CHASSIS
PCIe2-2712 PCI Express Gen2 Expansion System User’s Manual
6-3
Revision 1.0, February 2015
Table 6-1. SSI Auxiliary Signal Connector
6.3.4
Z2 “PNL LED” Front Panel LED Connector
A front panel LED power-on indicator c an attach at Z2. The connector pin out is as shown below. The
+3.3V is current limited with 150ohms. The connector is not polarized but pin 1 is indicated by a “1” in
the silk screen at Z2.
Table 6-2. Front Panel LED Connector
6.3.5
J30, J31, J33 Fan Connectors
Chassis cooling fans connect here. The connectors conform an Intel 4-wire PWN specification, however
there is currently no PWN circuitry enabled on the PCIe2-462 to vary fan speed. The connectors are
keyed and three wire fans will mate to the 4 wire headers without issues. The third wire in a three wire
fan is sense or tachometer output. Fans with tach outputs that pulse twice per revolution can be
monitored by the Monitor board circuitry. The Monitor board circuitry can detect a slowing (failing) or
stopped (failed) fan. The fan connector pin out is shown below. The connector is Moles 47054-1000 or
equivalent.
Table 6-3. Fan Connectors
Pin
Signal
1
SMCIk
2
SMDat
3
PS Alert
4
ReturnS
5
3.3RS
Pin
Signal
LED Connection
1
+3.3V
LED Anode
2
n/c
none
3
GND
LED Cathode
Pin
Signal
1
GND
2
+12V
3
Sense
4
Control
