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INSTALLATION INSTRUCTIONS
LC372 SOUND REINFORCEMENT MODULE
Pin
Function
Cat5 Color Code
1
Audio +
Orange /W
2
Audio -
Orange
3
Switch out *
Green /W
4
Switch out *
Blue
5
Switch out *
Blue/W
6
Switch out *
Green
7
+48 VDC
Brown /W
8
Ground
Brown
* Signal pin is determined by jumper setting on
call switch plates
.
Table 1 -
Call Switch and Remote Microphone RJ45 Connector Wiring
3. Aux Input Port
This port is used to connect to an LC372AI Audio Input Plate. This plate provides three (3) additional inputs to the
system. Each plate contains the following inputs:
•
One balanced XLR mic/line switchable input
•
One unbalanced stereo input through a mono summing 3.5mm TRS jack
•
One unbalanced stereo mono summed input through two (2) RCA jacks
Pin
Function
Cat5 Color Code
1
RCA Audio +
Orange /W
2
RCA Audio –
Orange
3
1/8” Jack Audio +
Green /W
4
XLR Mic/Line Audio + Blue
5
XLR Mic/Line Audio –
Blue/W
6
1/8” Jack Audio –
Green
7
+48 VDC
Brown /W
8
Ground
Brown
Table 2 -
RJ45 Connector Wiring
4. Handset RJ45 Port
This port is used to connect an LC21HS Intercom Handset. When the LC21HS is lifted off its cradle switch, the
intercom call switches into a private mode and disconnects the room microphone(s) and speaker and uses the
microphone and speaker in the handset for a private intercom conversation. Once the handset is returned to the
cradle switch, the room microphone(s) and speaker are restored.
Pin
Function
Cat5 Color Code
1
Handset Mic
Orange /W
2
Handset Mic Output –
Orange
3
Hookswitch Out
Green /W
4
Handset Earphone Input + Blue
5
Handset Earphone Input – Blue/W
6
Hookswitch Out
Green
7
+48 VDC
Brown /W
8
Ground
Brown
Table 3 -
Handset RJ45 Connector Wiring
5. IR Receiver Inputs
Up to three individual IR receivers can be connected to these ports to interface with the Atlas Learn IR micro-
phones. These connectors can utilize the supplied cable or UL Listed RG59 coaxial cable with F-type fittings. The
maximum cable length is 10m (32.8’).
6. Power and Network RJ45 Port
This port is used to connect the LC372SR to the system network. It connects to the network through either an
LC41PI or LC48MPI Power Injector that provides 48VDC power to the device. Note that power is provided only
using the LC41PI or LC48MPI. This device is not compliant with PoE switches.
Pin
Function
CAT5 Color Code
1
Data Rx +
Orange /W
2
Data RX –
Orange
3
Data TX +
Green /W
4
+48V DC
Blue
