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OPERATION
A fault signal activates the timer on the card.
After the individually pre-set time has elapsed the indicator lamp
starts to flash, while at the same time the output relay for the
group involved is activated.
The signal is acknowledged by pressing the common red accept button,
which resets the output contacts and changes the lamp to a steady
light.
Finally, when the sensor contacts return to their normal state,
the indicator lamp goes out.
LB-10 can be supplied in a version without indicator lamps, for
use in a mimic diagram or similar types of display.
SECURITY
LB-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.
Normal function testing is carried out by pressing the black button,
which simulates a fault on each alarm channel. In addition, the
unique group alarm test gives a more sophisticated safety-assurance
test. It checks that each individual alarm point contributes to
its group output.
LB-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.
The cards fit into strong guide rails and can be locked into position.
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
LLB-10 is designed for panel mounting.
The unit is available in both master and slave versions and the
system can, therefore, be built up in stages with, or from the start
comprise, one master and up to 9 slave units.
The test and accept facilities are provided only on the master unit,
which carries out these function on behalf of the slave units.
The unit is connected through plug-in terminal cards. One of these
is for the external leads and the other for internal connections
between the master and slave units. This makes connection very simple,
whilst allowing for easy separation of the complete unit.
SPECIFICATIONS
| Supply voltage: |
24V or 48V DC ± 20% smoothed or unsmoothed |
| Supply current: |
Normal condition 0.2A, Alarm condition (max.) 0.7A |
| Time delay: |
0.5 - 20 sec. adjustable for each alarm card |
| Number of alarm groups: |
2 or 4 per system (A-B-C-D alarm) |
| HyDELETREe: |
max 80% not condensed |
| Output contacts: |
One change-over contact per alarm group. Contact rating 100V,
100VA, resistive load |
| Front: |
Dull black aluminium |
| Main dimensions: |
DIN 144x144x35 mm |
| Panel recess: |
125x125 mm |
| Legends: |
Space for legends 50x15 mm, or engraved on lamp screens |
| Indicators: |
Red lamps = faulty indication (Ba9s 24V 50mA or 48V 40mA) |
| Main dimensions: |
350x96x155 mm, panel mounting.
330x150x75 mm, terminal mounting |
| Panel recess: |
330x76 mm (for service handling, we recommend 20 mm between
each panel) |
| Max permissible external cable resistance: |
1000 ohm |
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