ICA100 Rev171109
12
ICA400/500 SERIES INSTALLATION
Note: In a three-way system (ICA500) master station A has transmit priority 
over master station B and the remote station.
Note: Mounting hardware is not included, number 10 hardware is recommended.
Pre-Installation
1.  Measure and mark station box locations for panel opening and four screw 
holes. Refer to Figure 7 for layout and dimensions.
2.  Drill four mounting holes at each station box location for mounting hardware.
3.  Cut out panel opening at each station location.
Note: Pre-installed apparatus wiring can be used. The intercom connections 
are one-to-one. The yellow wire is shield.
4.  Install the cable (with 3-pin connector) between remote and master station box 
locations. Refer to Figure 8 or 9 for wiring details.
5.  For three-way system (ICA500) install the cable (with 5-pin connector)  between 
master stations A and B box locations. Refer to Figure 9 for wiring details.
Install Remote Station
1.  Place station box in position and secure with four screws.
2.  Connect station box 3-pin Molex connector to cable connector. 
Install Master Station(s) 
1.  Place station box(es) in position and secure with four screws.
2.  Connect station box 3-pin Molex connector to cable connector.
3.  For three-way system (ICA500) connect station box 5-pin Molex connector 
to cable connector.
4.  Connect black wire to ground.
5.  Connect red fused wire to +12 VDC.
6.  For three-way system repeat steps 3 through 5 at master station B.