SATEL
INTEGRA 128-WRL
11
be disturbed as a result of writing data to FLASH memory or after launching the
STARTER program be connected to the mainboard outputs.
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.
If you use the twisted-pair type of cable, remember that the DTM and CKM / DT and
CK (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.
It is recommended that the control panel be mounted high above the floor. This will allow you
to get a better range of radio communication and avoid the risk of the control panel being
accidentally covered by people moving around the premises.
