Bedienungsanleitung Satel Integra 64 Plus (Seite 12 von 35) (Englisch)

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10 Installer Manual SATEL

5.2 Estimation of the system current consumption

At the security system planning stage you should sum up the currents consumed by all

devices included in the system (control panel mainboard, keypads, additional modules,

detectors, sirens, etc.). The calculation should take into account the battery charging current.

If the sum of currents exceeds the maximum output current of the control panel power

supply, expander with power supply or an additional power supply unit should be used.

The sum of currents consumed by the devices connected to the power supply unit (expander

with power supply) must not exceed the power supply output current.

If you plan to connect devices to particular power outputs (of the control panel, expander with

power supply, etc.), remember that the sum of currents consumed by these devices must not

exceed the maximum current carrying capacity of those outputs.

5.3 Cabling

It is recommended that unscreened straight-through cable be used for making electric

connections between devices included in the system (using the twisted-pair type of cable,

e.g. UTP, STP, FTP, is not advisable).

If you use the twisted-pair type of cable, remember that the DTM and CKM / DT1 and

CK1 / DT2 and CK2 (data and clock) signals must not be sent through one twisted-pair

cable.

It is recommended that separate cables be used for keypad bus and expander bus.

Select cross-section of the power supply wires so that the supply voltage drop between the

power supply and the supplied device should not exceed 1 V as against the output voltage.

In order to guarantee correct functioning of the system components it is important that

resistance and capacitance of the signal wires be as low as possible. When the distances

between the devices are greater, several wires connected in parallel may have to be used for

each signal, in order to reduce conductor resistance. This, however, may lead in

consequence to an increase in conductor capacitance. Too high resistance or capacitance of

the cables connecting the control panel to keypads or expansion modules can prevent the

devices from working correctly (e.g. the control panel will be unable to identify devices,

absence of devices will be reported, etc.). When selecting the length of cables, follow

recommendations set out in sections on connection of particular types of devices.

When making the cabling, remember that there must be sufficient distance between the low-

voltage wires and the 230 V AC power supply wires. Avoid running the signal cables in

parallel to and in close proximity of the 230 V AC supply cables.

5.4 Installation of control panel mainboard

The control panel mainboard contains electronic components sensitive to

electric charges.

You must complete all wiring, connections and device installations before

connecting the battery or applying AC mains to the control panel.

The control panel should be installed indoors, in spaces with normal humidity of air. The

control panel must be protected against unauthorized access.

A 230 V AC power supply circuit with protective grounding must be available at the control

panel installation place.

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