OPERATION

LDC-10 can be fed from an AC supply.

The unit has flashing indicator lights and a memory. Alarms can be graded into three groups according to urgency. The channel memory and the actual output contact has expired. The alarm signal is acknowledged with the red reset button and the corresponding lamp changes from a flashing to a steady light, while at the same time the output contact for the alarm group is reset.

The unit is also fitted with special plug-in connector (s), which supply extra information, such as alarm point status, to external units, for example, through an interface board (731) to a computer.

SECURITY

LDC-10 is designed for severe mechanical and electrical environmental conditions.
It is provided with protection against polarity reversal and accidental connection of voltage.
The unit is designed to indicate voltage failures; each group relay is normally activated. In the alarm state the relay is deactivated and a signal can be given with, for example, a horn. The same thing happens when the supply voltage is interrupted.

All alarm channels are checked by the function test, including channels in alarm condition. When the black function test button is pressed, faults are simulated on all channels and all timers are started. Simulation of the correction of existing alarms occurs during the time the button is held pressed in. The button is released after 30 seconds, when all the timers have run out. The existing alarms are then activated and the corresponding timers start. After a further 30 seconds, all alarm channels have, therefore, been tested.
None are left unchecked - a facility that is unique in alarm systems of this size.

LDC-10 is fitted with a running light indicator to confirm that
the power is connected. Lamps are checked manually by pressing the black function test button and the red accept button, simultaneously. At the same time as the function test takes place, a group alarm test is automatically made. This checks that all alarm channels are contributing to their group alarm output.

The unit is in accordance with CE-standards: EN 50 082-2; IEC 801-2:1991; ENV 50 140; ENV 50 141; IEC 801-4.

INSTALLATION

LDC-10 LD is designed for panel, cabinet or wall mounting.

It is made only in the master version.

Systems with more than 10 alarm channels require additional panels.

Connection is made to the unit by an easily accessible screw terminal block, which can be fitted with a corresponding terminal strip. The use of this system means that cable connections need not be disturbed once the installation is complete, and that the unit can be disconnected very quickly.

SPECIFICATIONS

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info@imsab.se • Guldringen 1, SE-426 52, V.Frölunda, Sweden