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18
6.WIRING RULES
6.1. POWER SUPPLY
6.1.1. The main system hardwired devices:

Control Panel Astra-8945 Pro

Wireless Extender WE 2.4 GHz or WE 433 MHz

Hardwired Keypad HKP Astra-814 Pro

Indication Panel Astra-863 ver.A/B
are powered from DC power supply of 10-27 V . These devices have an additional
input for connecting backup power supply.
IP Astra-863 ver.A/B contain a DC-DC converter in its electronic circuit for supplying
Astra-863 ver. AE/BE extenders ("+SLV" and "-SLV" terminals).
Astra-8945 Pro, Astra-814 Pro and Astra-863 ver. A/B have a special Zone input
with current control terminated by a resistor of 3.9 kOhm to connect a relay output of a
power supply unit for the purpose of its operability supervision. The resistance of the
input of 3.9 kOhm
provides “Normal” status; short circuit or circuit cut provide “Failure”
status of the Zone input.
In case the Zone input is not used, it must be terminated with the resistor of 3.9 kOhm
and de-activated.
Astra-Z WE, Astra-863 ver.AE/BE and Astra-823 have no Zone input.
Attention!
System wiring must be carried out with the power switched off!