IEB-400 Intercom Board
Document
IM-IEB-400-1.1
2015 Harding Instruments - Printed in Canada
1.
Intent & Scope
This document describes the installation procedure for the IEB-400 intercom board. The intercom board is used to
interface with 8 ohm intercom stations to obtain full MicroComm DXL quality and performance. The board can
also be used to transform 8 ohm ceiling loudspeakers and an external call switch into an intercom station.
2. Description
The IEB-400 intercom boards are connected to a DXI system via a SAB-400 or SAB-401 station audio board, or to a
DXL system via a SCC-400 or SCC-401 station control card. Each IEB-400 intercom station is connected to the
system via a 4-pin header and a single shielded twisted pair cable that carries all the microphone, loudspeaker,
switch, and LED indicator signals.
An 8-pin header is used to connect the IEB-400 intercom board to an 8 ohm loudspeaker, up to two switches and
an LED.
PCB06741-06
MicroComm
ICE-400 Station
CN2
CN8
CN4
Line
+
+
-
-
F
ace
p
lat
e
SPK
SPK
SWB+
SWB-
SWA+
SWA-
LED+
LED-
SPK
SW
SW
SPK
SPK
SW
SW
SPK
AB
S
E
CONDARY
PCB06741-06
MicroComm
ICE-400
Intercom Station
1.95"
2.13"
2.75"
CN2
CN8
Component Side
Back Side
Pin 1
Pin 1
Figure 1 IEB-400 showing Dimensions and Header Positions
3. Installation
A simplified diagram of an IEB-400 is shown in Figure 1. The 4-pin header CN8 connect the audio lines to the
DXL or DXI and the 8-pin header connects the loudspeaker, switch(es) and LED to the IEB-400 itself.
