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Technical Description
1.1
Purpose and Capabilities
The “Nord GSM” device is intended for operation as the head unit of the security and fire complex - the receiving
and monitoring security and fire alarm device (PKKOP), installed in the premises at the protected sites.
Various wired and wireless security, fire and process detectors and devices can be connected to the device. An
optional CN-WRL wireless expander is used to connect wireless devices.
The device can generate and transmit to the control panel messages about events occurring during its operation
and related to:
∙
the device arming or disarming;
∙
changes in the state of its security zones;
∙
changes in the state of its power sources (main and backup);
∙
disruptions in the operation of communication channels used by the product and other malfunctions;
∙
activation and restoration of the state of the housing tamper switch.
The device transmits notifications to the receiver using the built-in GSM/GPRS-communicator via voice channel,
SMS or GPRS. It is possible to transmit messages over the Ethernet network using the optional Ethernet Adapter
module installed in the product, as well as via the radio channel using the midrange, VHF or UHF radio transmitter
installed in the product.
The device is equipped with uninterrupted power supply and automatically maintains its backup power source
installed in its case during its entire operating life. The product is capable of providing power supply to the
connected communication modules (communicators) and devices for expanding its functionality within the limits
of permissible consumed capacities.
1.2
Power Supply
The main power source of the product is a single-phase network AC 220 V 50 Hz with a high voltage of (127
÷
264)V.
The following can be used as a backup power source:
∙
sealed lead-acid battery (battery), corresponding to the standard IEC 1056-1, with a rated voltage of
(12.6
±
0.6) V. The battery is installed inside the product body;
∙
external uninterruptible power supply (UPS), with a rated nominal output voltage of 12 V and permissible
current load of at least 1.5 A with the installed battery of the required chemical system. The external UPS
shall be connected to the product
instead
of the battery.
The permissible voltage range of the backup source when the product is started in the absence of the main source
is from 10.0 V to 14.4 V.
The recommended capacity of the battery installed inside the product plastic case is 1.2 or 2.2 (Ah), for example,
DELTA DTM 12022.
The product provides automatic maintenance of the installed battery, which includes the following:
∙
stage of a “sparing” charge of a deeply discharged battery with a current of (100
±
20) mA before reaching the
voltage of (11.5
±
0.2) V;
∙
subsequent charge of the battery at the second stage with a current of (230
±
25) mA;
∙
final voltage on the battery at the end of its charging cycle at (14.0
±
0.2) V and then keeping it in the range
of (13.6
÷
14.0) V to compensate the current of its self-discharge;
∙
ability to automatically turn off the discharged battery in the absence of the main power supply when the
voltage on it reaches (9.0
±
0.3) V;
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