P/N IM-520/MH Rev. E
5
© 2017 Johnson Controls. All rights reserved. All specifications and other information
shown were current as of document revision date and are subject to change without notice.
Wiring between the sounders is accomplished by connecting between them using TB1
input and output. Install conduit into the knockout located at the bottom edge of the back
box. Use this conduit to run wires between units. Terminals 1+2 are sync output and 3+4
are sync input. Wiring must start at the master. Connect the sync output from the master to
the sync input of the first slave. Observe polarity of the connections. Terminal 1 on the
master should go to terminal 4 on the slave and terminal 2 on the master should go to
terminal 3 on the slave. To connect more than one slave, continue to wire from output to
input slave to slave until the last one is connected. Refer to figure 4 for the wiring diagram
of interconnected sounders.
Problems with wiring or improper jumper settings will cause an EOL/Config trouble at the
control panel. Check the wiring and jumper settings and correct any wiring/configuration
issues.
Note: The sounders will still activate as programmed even if an EOL/Config
error is present on the control panel but they may not be synchronized.
FIGURE 4
Pseudo Master Feature
If a slave loses its sync communication with its master it will automatically switch to pseudo
master mode. In this mode the pseudo master will assume master functions and generate
supervision and sync pulses to keep connection integrity monitored and any other down
