RouterBOARD 493 Series User's Manual
User's Guide
Assembling the Hardware
First to use the board:
●
Insert MiniPCI cards;
●
Install the board in a case and connect antenna wires, if needed;
●
Connect other peripherals and cables.
It is recommended to connect all the antenna cables to the miniPCI cards before powering the device.
Powering
Power options:
●
Power jack:
10..28V DC (cut-off voltage - 30V)
●
Power over Ethernet (PoE) on the LAN1 Ethernet port:
10..28V DC (18..28 V suggested; cut-off voltage - 30V) non-standard PoE powering support
The board has a direct-input power jack (5.5mm outside and 2mm inside diameter, female, pin positive
plug) and can as well be powered with PoE. All power inputs are always active, but only one should be used
at the same time.
RouterBOARD 493 series boards are equipped with a reliable 25W onboard power supply with overvoltage
protection. 12..28 V DC input voltages are accepted, but when powered over long cables, it is suggested to
use at least 18V. The system is tested with 24V solar/wind/RV systems with 27.6 charge voltage.
Overvoltage protection starts from about 28.1V-29V ±delta
(depends on some part physical options,
works up to 60V), so the board will not be damaged if connected to a 48 or 60 V power line.
RouterBOARD 493 series boards are compatible with non-standard (passive) Power over Ethernet injectors
(except power over datalines) and accept powering over up to 100m (330 ft) long Ethernet cable connected
to the Ethernet port (
J8
). The board
does not
work with IEEE802.3af compliant 48V power injectors.
If using PoE, RB493G should be powered only with a special Gigabit power injector.
The maximum output of the power supply to the extension cards is normally at about 5.5A.
Booting options
First, RouterBOOT loader is started. It displays some useful information on the onboard RS232C
asynchronous serial port, which is set to 115200bit/s, 8 data bits, 1 stop bit, no parity by default. The loader
may be configured to boot the system from the onboard NAND module or from Ethernet network. See the
respective section of this manual for how to configure booting sequence and other boot loader parameters.
Onboard NAND Storage Device
The RouterBOARD may be started from the onboard NAND storage chip. As there is no partition table on the
device, the boot loader assumes the first 4MiB form a YAFFS filesystem, and executes the file called “kernel”
stored in the root directory on that partition. It is possible to partition the rest of the medium by patching
the kernel source.
Booting from network
Network boot works similarly to PXE or EtherBoot protocol, and allows you to boot a RouterBOARD 493
series computer from an executable image stored on a TFTP server. It uses BOOTP or DHCP (configurable in
boot loader) protocol to get a valid IP address, and TFTP protocol to download an executable (ELF) kernel
image combined with the initial RAM disk (inserted as an ELF section) to boot from (the TFTP server's IP
address and the image name must be sent by the BOOTP/DHCP server).
To boot the RouterBOARD computer from Ethernet network you need the following:
●
An ELF kernel image for the loader to boot from (you can embed the kernel parameters and initrd
image as ELF sections called
kernparm
and
initrd
respectively)
●
A TFTP server which to download the image from
●
A BOOTP/DHCP server (may be installed on the same machine as the TFTP server) to give an IP
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