EVO Installation Guide 17
2.9 Earth Ground
Connect the ground connector to the enclosure and to a metal cold water pipe or grounding rod as per local
electrical codes.
2.10 AC Power
Use a 17Vac (50/60Hz) transformer with a minimum 20VA rating. For increased power use a 40VA rating.
AC/AC transformer:
For residential installations use transformer made by Universal Power Group model: UB1640W
For US: UL/ETL LSS standard Listed Class 2 wall/building 120VAC/60Hz power supply with restraining means.
For Canada: CSA/ULc/ETLc LSS standard Listed Class 2 Power Supply with NO restraining means
Note: Do not use any switch-controlled outlets to power the transformer. The system should be connected to
the building’s power source (receptacle) by an AC/AC transformer:
Do not connect the transformer or the backup battery until all wiring is completed. When powering up
the EVO control panel, the panel will begin a module scan.
Do not short the terminals of the transformer together. This causes the internal fuse to blow.
The transformer must be connected to a 110 VAC, 24-hour outlet not controlled by a switch other than an
approved over-current protection device.
For continued protection against risk of fire, replace fuses only with fuses of the same type and rating.
2.11 Backup Battery
Connect a 12Vdc 7Ah rechargeable acid/lead backup battery. Verify the polarity, as reversed connections will
blow the battery fuse. For details on how to set the Battery Charge Current to either 350mA or 850mA, see
see
section 14.6 on page 89. Battery capacity for emergency standby is at least 4 hours. Using the minimum
configuration of the system will provide 24 hours standby using the 7Ah battery.
2.11.1 Battery Test
1. The control panel conducts a dynamic battery test under load every 60 seconds. If the battery is
disconnected, if its capacity is too low or if the battery voltage drops to 10.5 volts or less when there is no
AC, the “Battery Trouble” message will appear in the Trouble Display. At 8.5 volts, the panel shuts down and
all outputs close. The panel will cease to process sensor trips if the voltage is under 8.5V.
2.12 Auxiliary Power Terminals
The auxiliary power supply can power accessories in thesecurity system. A fuseless circuit protects the auxiliary
output against overload and shuts it down if the current exceeds 1.1A. Auxiliary power will resume once the
overload condition has restored. Press and hold the AUX button for two seconds to turn AUX power on and off.
2.13 Bell/Siren Output
The bell output supplies 12Vdc upon alarm and can support one 30-watt or two 20-watt sirens. The bell output
will automatically shut down if the current exceeds 3A. If the load on the
BELL terminals returns to normal (≤3A),
the control panel will re-instate power to the
BELL terminals. Please verify correct polarity.
Note: Use Wheelock 46T-12 siren.
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