User`s manual

FR550
3-13
Pin Signal Name (USB1) Pin Signal Name (USB2)
1 +5V 5 +5V
2 USB0- 6 USB1-
3 USB0+ 7 USB1+
4 Ground 8 Ground
WARNING: When you connect a ribbon cable to these ports, you must orient the cable
connector so that the PIN 1 edge of the cable is at the PIN 1 end of the on-board connector.
3.5.5 Power Input Connector (20-pin block) (J8)
This connector supports a standard ATX power supply. When connecting, make sure the lock
key matches the hook attached on a power supply cable. The power cord should be unplugged
when you connect it.
WARNING: Make sure that the ATX Power Supply can take at least 10 mAMP load on the
5 Volt Standby lead (5VSB). You may experience difficulty in powering on your system
without this.
Pin Name (Function) Pin Name (Function)
11
3.3V (Power +3.3 Voltage)
1
3.3V (Power +3.3 Voltage)
12
-12V (Power -12 Voltage)
2
3.3V (Power +3.3 Voltage)
13 Ground (Power Ground) 3 Ground (Power Ground)
14
PS_ON (Soft-Off Control)
4 +5V (Power +5 Voltage)
15 Ground (Power Ground) 5 Ground (Power Ground)
16 Ground (Power Ground) 6 +5V (Power +5 Voltage)
17 Ground (Power Ground) 7 Ground (Power Ground)
18 -5V (Power -5 Voltage) 8 PWRGD (Power Good)
19 +5V (Power +5 Voltage) 9 5VSB (Standby 5V)
20 +5V (Power +5 Voltage) 10
+12V (Power +12 Voltage)
3.5.6 Keylock and Power_On/Suspended LED Connector (5-pin)
(J13)
The FR550 supports one straight 5 pin header for connecting to front pannel
Power/Suspended LED indicator. The Power LED will become blinking once the system get
into Suspend Mode.
Pin Signal Name
1 LED+
2 No Connect
3 LED-
4 Keylock
5 Ground
3.5.7 HDD LED Connector (4-pin) (J12)
The FR550 supports one straight 4 pin header for connecting to front pannel Hard Disk
activity LED indicator.