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2017/11
HIGH POWER EXTENDED DISTANCE CONSIDERATIONS
Figure 3 - Alternate Power Supply Location
The NV-EC1701U has a power inlet connector that receives 55 volts from an external Class 2 SELV desk-style power
supply. Power is distributed to:
1)
The transceiver’s internal electronics;
2)
the RJ45, provided the connected camera or other device provides the appropriate 27K ohm PoE ‘discovery
signature’. 55V power is provided on pins 1&2 and 5&4, while 3&6 and 7&8 are at 0 V. The use of all four wire-
pairs ensures maximum distance, even for high-power loads, such as P/T/Z cameras; and
3)
the coax cable, where it is used by the control-room NV-EC1701U.
For fault/safety, never use more than two power supplies within a network.
Complete Installation Guide
Model NV-EC1701U
EoC Ethernet over Coax Transceiver
with PoE, PoE+, or High Power PoE
9
IP Endpoint
Ethernet over Coax EoC Transceiver
Cat5
NV-EC1701U
55VDC Power Supply
IP Endpoint
Ethernet over Coax EoC Transceiver
Cat5
NV-EC1701U
55VDC Power Supply
Ethernet over Coax EoC Transceiver
NV-EC1701U
Cat5
Ethernet
Swtich
LAN/WAN
