BreadCrumb
®
LX4 User Guide
Rajant Corporation
Version: 2.02
03-100117-001
The BreadCrumb LX4 ships with a standard 48 V AC/DC Passive PoE injector. The Rajant
VHDC-24 is an optional accessory, and supports powering the Breadcrumb LX4 from an
unregulated DC supply.
2.4.3 USB
The signals that interface to the BreadCrumb LX4 device's USB port are located on the 19-pin
Amphenol connector on the enclosure (see Figure 3 and Figure 5). The port is compliant to the
Enhanced Host Controller Interface (EHCI) and USB Transceiver 2.0 Macrocell Interface (UTMI+)
Level 2 specifications. The port supports all three standard data transfer rates of low speed
(1.5Mbps), full speed (12Mbps), and high speed (480Mbps). The power switch for the port includes
over current protection, thermal protection, in-rush current limiting, and hot-plug noise filtering.
The USB port can be used to perform BreadCrumb firmware upgrades. It can also interface to an
optional GPS receiver accessory available from Rajant.
2.5 Status LED
The Status LED (see Figure 3) is capable of displaying warning and error codes, and link states. The
LED Mode can be configured in BC|Commander to be ON (switchable), ALERTS ONLY
(switchable), OFF (non-switchable), or OFF (switchable). When the LED Mode is ON, the
BreadCrumb LED alternates between displaying the link state and any warnings or errors. When the
LED Mode is OFF, the BreadCrumb LED does not display any warnings, errors, or the link state.
When the LED Mode is set for ALERTS ONLY, the BreadCrumb LED alternates between displaying
the link state and any warnings or errors only if there are warnings or errors to report. If there are no
warnings or errors, the LED displays nothing.
The Status LED combines the three base colors of red, green and blue to display a broader spectrum
of colors which indicate the current status of a BreadCrumb. The meanings of the color code
indicators are given in Table 6.
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