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Installation
UltraVoice Remote Interface (UVRI-B)
Electrical Connections
Install the siren electrical system in compliance with local electrical codes and NEC
recommendations. Federal Signal recommends that all user-installed conduit connections
enter from the bottom of the UVRI-B cabinet using the supplied conduit knockouts.
Disconnect all power and read all warnings at the beginning of this manual and on the
batteries before making connections.
Grounding Requirements
Review the following grounding requirements:
• The UVRI-B cabinet must be properly connected to an earth ground. The cabinet
contains an internal ground stud for making this connection.
• If an outdoor antenna is used, install a separate antenna ground.
Externally installed antennas require a dedicated ground to either a ground rod or
building steel below grade in addition to the UVRI-B cabinet ground.
Verify the AC voltage requirement for the UVRI-B model being installed. The
control board requires proper switch selection for 120 or 240 Vac.
The UVRI-B control PCB provides a removable connector for making the AC power
connections. The connector accepts bare 12-14 AWG wire.
Wiring Guidelines for 120 Vac Electrical Service
Review the following wiring guidelines:
1. Install a dedicated 15 A breaker in an existing breaker panel or install a new breaker
panel if necessary for the UVRI-B.
2. Install conduit from the beaker panel to a conduit entrance in the bottom of the
UVRI-B.
3. Route user-supplied 12-14 AWG wires (1 black, 1 white, 1 green - optional) through
the conduit from the UVRI-B cabinet and the fused breaker panel.
4. Connect the white neutral wire from the breaker panel neutral to pin 2 of JP38,
L2/NUE, on the UVRI-B control board.
5. Connect the black line wire from the 15 A breaker to pin 3 of JP38, L1/HOT, on the
UVRI-B control board.
6. Connect a green ground wire from the breaker panel earth ground to the ground stud
in the UVRI-B cabinet and to pin 1 of JP38, GND, on the UVRI-B control board.
7. To avoid shorting the output of the charger, do not apply AC power to the UVRI-B
controller before making the battery connections described later in this section.
