100 Series Intercom Stations
Page 2
Document IM- ICM-100-2.2
back about 1/2 inch. Ensure that the shield is not exposed or it may short out exposed contacts on the intercom
PCB when it is installed.
The pin configuration of the station connector is:
MTA Pin
Signal
1
audio +
2
audio -
3
N/C
4
N/C
To insert the signal wires into the connector you remove the white cover from the connector, insert the connector
into the tool from the left side (it will travel through the tool in the direction indicated by the arrow), pull the
trigger once to load the connector. Then insert the signal wire for pin 2 (do not strip the wire) into the hole on the
top of the tool and pull the trigger to insert the wire into the connector. Then repeat to install the other signal
wire. Finally, remove the connector from the tool, replace the cover, and then slide the connector onto the pins on
the intercom station.
The intercom station can now be fastened to the back box.
4.
ICM-120 Horn Talkback Intercom Station
The ICM-120 intercom station is similar to those described above except that instead of using an internal
loudspeaker, it is connected to an external horn to provide its loudspeaking function. It still contains a call switch
and an internal microphone for audio input signals. The perforated area where the loudspeaker normally resides
is deleted.
Installation of the unit is similar to any other intercom station. The only difference is that pigtail leads are
provided for connection to the horn loudspeaker. Note that the horn loudspeaker requires a 25 volt line matching
transformer tapped for a maximum 1 watt power draw.
5.
ICM-125 Telephone Handset Intercom Station
The ICM-125 telephone handset station connects to the intercom system in the same manner as any standard
intercom station. However, instead of a loudspeaker and microphone, it communicates through a handset
mounted on a hookswitch. Instead of pressing a pushbutton to place a call request, lifting of the handset from the
hookswitch places the call request.
Note: It is advisable to install two pairs of cable for each handset location and reserve two station audio board
inputs to facilitate any future upgrade to a full duplex handset unit.
6.
ICB-100 Intercom Board (Talkback Kit)
ICB-100 Intercom Board talkback kits are installed on standard 8” loudspeakers to permit them to operate the
same as any intercom station. The units consist of a station board with a remote microphone and pigtail leads to
connect the loudspeaker and, if desired, remote call request buttons.
