User's Manual

Installing Ferrite Beads on Interface Cables for

MorphoAccess™ 220

This document provides an overview of ferrite beads and explains how to install them on the

power, Wiegand, RS-422, and Ethernet cables that you connect to the MorphoAccess™

220. To meet FCC requirements for Class B computing devices, a ferrite bead must be

installed on all cables connected to the MorphoAccess.

What is a Ferrite Bead?

Ferrite beads are radio frequency (RF) absorbers. To see an example of a ferrite bead, look

at a monitor video cable or a laptop computer power cable that is connected to your

computer. The walnut-sized protrusion that is molded near one end of the cable is a ferrite

bead. The size and shape of the ferrite bead determines the amount of RF that is absorbed.

The amount of RF that a device emits determines the type of ferrite bead that is required to

provide the proper absorption.

The ferrite beads supplied with your MorphoAccess 220 terminal have been properly sized

to absorb the correct amount of RF to comply with FCC requirements.

Installing a Ferrite Bead

After all the cables have been routed through the wall, place a single ferrite bead around all

of them before you install the MorphoAccess 220 terminal. See instructions below. The

foam strip will be compressed in the ferrite bead to prevent the ferrite bead from slipping

down the cable.

1. Open a ferrite bead by releasing the clasp on the side.

2. Determine where the ferrite bead will be positioned on the cables. It should be

positioned as close as possible (but not inside) to the MorphoAccess terminal.

Ensure that sufficient cable slack will be available to route the cables inside the

MorphoAccess and to attach the wires to the terminal block.