8 VERSA
SATEL
included in the alarm system: control panel, keypads, detectors, sirens, expansion modules
etc. The control panel and other alarm system components should be installed within the
protected area.
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 an unshielded non-twisted cable be used for making electric
connections between devices included in the system.
If you use the twisted-pair type of cable, remember that CLK (clock) and DTA (data)
signals must not be sent through one pair of twisted conductors.
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.
Avoid running the cables in parallel to or in close vicinity of the 230 V AC wires, as this may
result in malfunctioning of the system.
5.4 Installation of control panel mainboard
The control panel mainboard contains electronic components sensitive to
electric charges.
Before connecting the mainboard to power supply source (battery, alternating
voltage from transformer), you must first complete all the installation work with
hardwired devices (connection of keypads, expansion modules, detectors etc.).
The control panel should be installed indoors, in spaces with normal humidity of air. The
control panel must be protected against unauthorized access. The installer should provide
protection for the users and service personnel by using a suitable device enclosure.
A 230 V AC power supply circuit with protective grounding must be available at the control
panel installation place.
Summary of Contents for Versa 10
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