Mimosa Backhaul Help Content
Mimosa Backhaul Specifications
Copyright © 2014 Mimosa Page 51
Power over Ethernet Specifications
Radio Voltage Input Specifications
Product Applicability: B5/B5c, B5-Lite, B11
Mimosa backhaul radios comply with the 802.3at PoE+ standard. While the radio’s nominal operating voltage is 48
volts, it accepts an input voltage range of 44 to 57 volts on a wide variety of pin combinations. An input voltage of -
48 Vdc is also acceptable.
The included PoE injector was designed to compensate for voltage drops even over the longest cable runs allowed
by the CAT6 standard, less protection circuit losses which net to 100 m (328 feet).
PoE Injector Output Specifications
Mimosa backhaul radios will work with most 802.3at-compliant, 48V PoE adapters. Mimosa recommends the use of
the Mimosa provided PoE adapter in order to ensure maximum throughput
1
, protection in the event of lightning
strike, and to maintain product warranty.
Input Surge Protection
Product Applicability: B5/B5c, B11
The Mimosa POE is designed to protect connected equipment against voltage and current surges in two ways:
Transformer isolation between the two Ethernet ports; and
●
Gas Discharge Tubes (GDTs) on the DATA+POE port.
●
In case of lightning, GDTs become a virtual short, diverting surge current and voltage to ground and away from
connected equipment. Other PoE’s may not have these protections which could lead to equipment damage during a
lightning event.
We do not recommend any additional surge protection devices placed between the Mimosa POE and radio because
the increased capacitance may cause port flapping between 100BaseT and 1000BaseT.
Input Voltage Range
Product Applicability: B5/B5c, B5-Lite, B11
The Mimosa PoE provides power over all four pairs of wires so there is less voltage drop over a long cable run.
Voltage is provided from the Mimosa PoE at 56 Vdc instead of the nominal 48 Vdc for the same reason, although
Mimosa Backhaul radios accept a wider input voltage range (44-57 Vdc). An input voltage of -48 Vdc is also
acceptable (see below).
Reverse Polarity Protection
Product Applicability: B5/B5c, B5-Lite, B11
All Mimosa radios include a diode bridge circuit which corrects for reverse polarity on the power inputs, and
improves compatibility with 3rd-party 802.3at-compliant PoE injectors and switches that meet the power
specifications
2
.
Table 1 below shows valid combinations of +VE and -VE to the B5/B5c on either 2 or 4 wire pairs. All of the
To Next Page
Loading...
Need help?
General
