Rajant Corporation
BreadCrumb
®
ME3 User Guide
03-100116-001
Version: 1.02
the18-pin Amphenol connector on the enclosure (see Figure 3 and Figure 4). The ports support Auto
MDI/MDIX allowing the use of either straight-through or crossover data cables for connections.
The data interface includes electrostatic discharge, and electrical fast transient/burst immunity
compliant to the IEC 61000-4-2, and IEC 61000-4-4-EFT standards, respectively.
The ME3 cable assembly plugs into the 18-pin Amphenol connector and provides a standard RJ-45
Ethernet connector for easy access to the the first ME3 Ethernet port.
Note
The standard ME3 cable assembly does not provide access to the second ME3
Ethernet port. For a custom cable assembly that provides access to both Ethernet
ports, please inquire your Rajant sales representative.
1.3.3.3 USB
The signals that interface to the BreadCrumb ME3 device's USB port are located on the 18-pin
Amphenol connector on the enclosure (see Figure 3 and Figure 4). 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.
1.3.4 Antenna Connector
BreadCrumb ME3 provides one Type N antenna connector located on the top side of the enclosure
(see Figure 3).
Warning
To avoid possible damage to the BreadCrumb radio, always connect or disconnect
the external antenna with the power to the BreadCrumb ME3 off.
1.3.5 Status LED
The Status LED (see Figure 3) indicates the current status of a BreadCrumb. The Status LED
combines the three base colors of red, green and blue to display a broader spectrum of colors. The
meanings of the color code indicators are given in the table below:
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