
Installing the FlexPS processor
FlexPS Product Guide
Page 65
Power connections
When a central low voltage power supply is being used for primary power, it should be powered
from an uninterruptible AC power source. In a typical DC power distribution system the power
cable can be installed in conduit above or below ground. The power cable may also be installed on
the fence.
•
To power the system from a central source, run the power distribution cable around the
perimeter and tap off to each processor. Use a minimum 18 AWG wire for power runs up to 1.2
km (4000 ft.). For longer runs use 16 AWG gauge wire.
•
At each processor, splice the power cable to a lighter gauge pigtail that is approximately 30 cm
(12 in.) long. Connect the + - pigtail wires to T4 + and T4 -.
Local power supply
It is possible to use a local DC power supply when a source of AC power is readily available near
the processor. The DC power supply must be installed in its own weatherproof enclosure. The
local supply can be mounted on the same post as the processor to keep the wire runs to a
minimum.
Power over Ethernet
For power over Ethernet, a standard 48 VDC class 3 PoE switch is required. In this configuration,
minimum Category 5 cable is also required and the maximum distance between the FlexPS
processor and the PoE switch is 100 m (328 ft.). Use Cat-5 cable to connect the PoE switch to T1
(RJ45 jack) on the NIC. Then use the supplied power cable to connect T2 on the NIC to T4 on the
processor (observe polarity). See
Battery power
Each FlexPS processor includes an intelligent charging circuit for an optional 6 VDC rechargeable
battery. The backup battery will provide approximately 8 hours of emergency power when fully
charged (the age and condition of the battery, and environmental factors such as temperature
have a direct effect on battery run-time).
WARNING!
DO NOT bring AC mains power into the FlexPS enclosure. If a local
power supply is being used, it must be installed in its own
weatherproof enclosure. Consult the local electrical code for
information about the connection of AC mains to your power supply.
CAUTION
The PoE NIC is intended to supply power only to the processor on
which it is mounted. Do not attempt to power an auxiliary device with
the PoE NIC.
Note
Senstar strongly recommends the use of a fully managed PoE switch to
connect and power IP based FlexPS processors.