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P A G E
R A J A N T B R E A D C R U M B ® D X 2
Q U I C K S T A R T G U I D E
Power Input
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2.4 Power and Ethernet
The BreadCrumb DX2 has one RJ45 Ethernet port. The Ethernet port (ETH0) on the
BreadCrumb DX2 supports 10 Base-T, 100 Base-TX or 1000 Base-T configuration. The port
supports 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.
2.4.1 Power Requirements
The BreadCrumb DX2 ETH0 port supports Passive Power over Ethernet (Passive PoE), and
therefore acts as a dual function Ethernet and DC power input port for the BreadCrumb
DX2. An external inline passive PoE injector is used to merge DC power for the
BreadCrumb DX2 with data from a LAN port or a wired client.
To ensure proper operation of the BreadCrumb DX2, the inline injector must output a DC
voltage between 8 VDC to 60 VDC @ 10 W minimum. Using a higher output voltage
facilitates longer cable runs between the inline injector and the ETH0 port on the
BreadCrumb DX2. For details on Rajant’s VHDC-Series power accessories, please refer to
the VHDC-Series spec sheet.
The average idle power consumption of a BreadCrumb DX2 is 2.8 Watts W at 24 V. The
maximum peak power consumption of BreadCrumb DX2 is 7.5 W at 24 V. Up to 2.5 W of
additional power will be needed if a peripheral is being powered by USB (500 mA at 5 V is
available at the USB port). Input voltage to the DX2 should not dip below 10VDC. Power
option include a POE Injector (RGPOE) readily available market wide.
Figure 3: POE Injector (RBGPOE)
