AMX NXA-PDU-1508-08, Руководство по эксплуатации/справочник

Страница: 11 / 20

Installation
7 NXA-PDU-1508-8 Power Distribution Unit (240V / 10A)
Preparing Captive Wires
1.
Strip 0.25 inch (6.35 mm) of wire insulation off all wires.
2.
Insert each wire into the appropriate opening on the connector according to the wiring diagrams and
connector types described in this section.
3.
Turn the flat-head screws clockwise to secure the wires in the connector.
AxLink Data and Power Connections
Connect the AxLink device’s AxLink connector to one of the AxLink connectors (1-8) on the rear panel of the
PDU for data and 12 VDC power as shown in FIG. 9.
AxLink Wiring Guidelines
AxLink devices require 12 VDC power to operate properly. The necessary power is supplied via the AxLink
cable. The maximum AxLink wiring distance is determined by power consumption, supplied voltage, and the
wire gauge used for the cable.
Use the 3-step formula below to calculate the maximum wiring lengths allowable between the PDU and
connected AxLink devices.
1.
< Total current consumption of all connected AxLink devices > x < Resistance/Foot > x 2 =
< voltage drop per foot > ( see table below for Resistance/Foot values.)
2.
< Power supply voltage > - 12 VDC =
< surplus voltage dissipation for cable run >
.
3.
<
surplus voltage dissipation for cable run
>
/
<
voltage drop per foot
>
=
Maximum distance in feet.
The following table lists the resistance factors used in the formula.
Do not over-torque the screws; doing so can bend the seating pins and damage the
connector.
FIG. 9 AxLink straight-thru wiring
PWR
AXP
AXM
GND
AxLink Device NXA-PDU-1508-8
PWR
AXP
AXM
GND
(see note below)
If the PDU is connected to a NetLinx Master that is self-powered (powered by a
stand-alone power supply other than the PDU, or the DVX-2100HD which features an
internal power supply), do not use the AxLink Power connection between the PDU
and the NetLinx Master.
Cable Gauge/Resistance Factors
Solid Copper Wiring Stranded Copper Wiring
Wire gauge Resistance/Foot Resistance/Foot
18 AWG .00639 .00692
20 AWG .0101 .01090
22 AWG .0162 .01690
24 AWG .0257 .02770