Sigrand SG-17B, Руководство пользователя

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devices located at the site of the modem installation, for instance, video-
camera backlighting devices or thermo-elements of outdoor housings. Also,
through-line powering can be used to feed devices that are not supplied
with Power-over-Ethernet system.
The voltage of through-line powering is constant-current 48 Volt. The
capacity of the devices hooked up through the system of through-line
powering (for SG-17B-261 modem, the total of the capacities of the devices
hooked up through the system of through-line powering and
РоЕ) must not
exceed 10 watt. The socket arrangement and the polarity are shown in Fig.
3.
When hooking up equipment through the system of through-line
powering need to make a preliminary calculation of the power
consumption of connected devices. When connected to equipment in
excess of the allowable values of power - protection will overload.
Figure 3
1.4.4. Power-over-Ethernet powering of the equipment
Modems SG-17B-541 and SG-17B-261 can be used to feed equipment
connected up to them by means of Power-over-Ethernet Class 2 technology
(capacity up to 10 Watt).
In this case, powering is carried out through the version “B” (Table 3) via
spare wire pairs.
Table 3
Contacts of the ETHERNET
socket
Function
DATA POWER
1 Tranceive DATA+
2 Tranceive DATA-
3 Receive DATA+
4 Positive VPort (+U)