Installation
INSTALLATION
2.1
Location & Mounting
Remove the printed circuit board, mounting hardware and keypad from the packaging inside the panel box. The circuit board should not be mounted into the back of the cabinet, until all cables are pulled into the cabinet and prepared for connection. Before mounting the cabinet, push the five white nylon-mounting studs into the back of the cabinet. Select an installation site that is not easily accessible to intruders. Leave at least 2" around the panel box to permit adequate ventilation and heat dissipation. The installation site should be dry and close to an AC source, ground connection and telephone line connection.
2.2
Earth Ground
Connect the zone and dialer ground terminals from the control panel to the metallic enclosure and cold water pipe or grounding rod as per local electrical codes. For UL installations, the metallic enclosure must be grounded to the cold water pipe or grounding rod.
For maximum lightning protection use separate earth grounds for the zone and dialer grounds (see figure 1)!
2.3
Power
2.3.1 AC Power
Use a 16.5V
AC
(50-60Hz) transformer with a MINIMUM 40VA rating to provide sufficient AC power (
AUX outputs = 500mA each); RECOMMENDED 75VA rating to provide maximum power output (
AUX outputs = 1A each). Do not use any switchcontrolled outlets to power the transformer. UL listed systems require the K12 model T16V40 or T16V75 transformer.
Do not connect the transformer or the back-up battery until all wiring is completed!
2.3.2 Back-up Battery
We recommend connecting a back-up battery to power the control panel, in case of power loss. UL installations require the use of a backup battery. Use a 12V DC 4Ah / 7Ah rechargeable acid/lead or gel cell battery. Connect the back-up battery after applying the AC power.
When installing the battery, verify proper polarity, as reversed connections will blow the battery fuse. Connect the "red" battery lead to the positive battery terminal, and the "black" battery lead to the negative battery terminal of the control panel. Use the Battery Charge
Current Jumper on the PCB to determine the charging current of the backup battery. With the jumper ON, the charging current will be set at 350mA. With the jumper OFF, the charging current will be set at 700mA.
2.3.3 Auxiliary Power Terminals
The 748 has two auxiliary outputs each of which can provide a maximum of 1A 12V
DC with a 75VA transformer and 500mA with a 40VA transformer (250mA 12V DC for 24hr standby on
UL installations). You can use the auxiliary power supply to power the motion detectors,
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