ZyXEL Communications IES4005M, User Manual

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Chapter 7 Cables
IES4005M User’s Guide
49
7.2.1 Application
Two 14-12 AWG wires to connect each DC input to a DC power supply to supply the operating
voltage for the IES chassis. The connections are as follows:
• One end of the power wires connects to the input on the DC input of the IES4005M-DU.
• The other end of the power wires connect to the output port of the DC power supply.
Note: The black power wire is the -48 V return ground wire connected to the ground
terminal of the DC input on the IES4005M-DU. The blue power wire is the -48 V
power wire connected to the -48 V terminal of the DC power board.
7.2.2 Specifications
The following table lists the specifications of the DC power wire.
7.3 Frame Ground Cable
Frame ground helps protect against lightning and interference functions.
7.3.1 Application
The frame ground cable must be attached to the IES using an M4 machine screw with a suitable
lock washer. The other end must be securely fastened to the chassis ground with a lug and screw
arrangement of M3.5 or greater.
• The frame ground is on the upper left of the chassis front panel.
• Connect the frame grounds to a building’s protective earthing terminals using a green-and-yellow
frame ground wire.
7.3.2 Specifications
The following table lists the specifications of the frame ground cable.
Table 33
DC Power Wire Specifications
ITEM DESCRIPTION
Function Electrical cable
Color Blue (-48 V power cable), black (-48 V return ground cable)
Connectors None, use bare wire
DC resistance of the inner conductor 4.95 ohm/km
Cross-sectional area of the conductor 4 mm2
Table 34
Frame Ground Cable Specifications
ITEM DESCRIPTION
Type Electrical cable
Color green and yellow