Application; Specifications; Frame Ground Cable - ZyXEL Communications IES4005M User Manual

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.
Table 33 DC Power Wire Specifications
ITEM
Function
Color
Connectors
DC resistance of the inner conductor
Cross-sectional area of the conductor

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 34 Frame Ground Cable Specifications
ITEM
Type
Color
IES4005M User's Guide
DESCRIPTION
Electrical cable
Blue (-48 V power cable), black (-48 V return ground cable)
None, use bare wire
4.95 ohm/km
4 mm2
DESCRIPTION
Electrical cable
green and yellow
Chapter 7 Cables
49