RouterBOARD 493 Series User's Manual
Hardware Guide
Extension Slots
MiniPCI Slots
The board has three MiniPCI Type IIIA slots with 3.3V only power signaling. They also accept MiniPCI Type
IIIB standard cards.
Supplied power for the extension cards (excluding CPU and onboard Ethernet ports):
+3.3V: 5.5A max
Input/Output Ports
LAN1 Port with PoE
This Fast Ethernet port is recognized as the first LAN interface. It is compatible with passive (non-standard)
Power over Ethernet. The board accepts voltage input from 10 to 28 V DC. It is suggested to use the higher
voltage for power over long cables because of better efficiency (less power is lost in the cable itself and
power supply is more efficient).
A Gigabit PoE injector is required to power
RB493G
.
See
Connector Index
for pinout of the standard cable required for PoE. All cables made to EIA/TIA 568A/B
cable specifications will work correctly with PoE. Note that this port supports automatic cross/straight cable
correction (Auto MDI/X), so you can use either straight or cross-over cable for connecting to other network
devices.
DB9 Serial Port
The RS232C standard male DB9 asynchronous serial port may be used for initial configuration, or for
attaching a modem or any other RS232 serial device. TxD (pin 3) of this port has -5V DC power when idle.
Some signals are not connected, so this implementation may not be considered to support full hardware
flow-control, so software flow-control (XON/XOFF) or none at all should be used.
Cooling Fan Connectors
You can connect up to four fans to the RouterBOARD RB493, but only two of them will work at a time.
JP1,JP2 are 3,3V. JP3,JP4 is the same voltage as received by the power jack. You can only use one pair of
fans (ie. JP1 + JP2 or JP3 + JP4). It is recommended to use a 12V PSU for the RB device, and JP3,JP4
headers with 12V cooling fans.
USB
RB493G features one USB 2.0 port. This port is not powered, this means that all connected devices require a
USB power injector to be used. For example:
http://www.routerboard.com/index.php?showProduct=99
LEDs
Power LED
Power LED is on when the board is powered.
User LED
User LED may be programmed at user's option. It is lit by default when the board starts up, then it is turned
off when the bootloader runs kernel.
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