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| Alarm
Display Unit LH 10 110DC |
OPERATION
The alarms can be graded into two groups, according
to the degree of urgency.
Each group is provided with a group alarm output and adjustable
time-delay.
The sensor contacts close (or open) and the corresponding lamp flashes.
The memory and the output contacts are activated when the pre-set
time for the group has expired.
The alarm signal is acknowledged by pressing the red accept button;
the flashing lamp becomes steady and the group output contacts return
to their normal state. When the fault has been corrected and the
sensor has returned to its normal state, then the indicator lamp
goes out.
Legends can be fitted to the indicator lamps or the screens can
be engraved. With LH-10 it is possible to connect a remote accept
facility and the unit can, also, be equipped for use in unmanned
power installations.
INSTALLATION
LH-10 is designed for panel mounting into a power
cabinet. LH-10, for use in power installations, is made only in
the master version.
The unit is connected through an easily accessible screw terminal
block, each fitted with an additional terminal strip (plug and socket).
Connection is simple and the terminal arrangement allows the unit
to be separated quickly, without disturbing the cable connections.
A selector switch, which can be easily changed on the circuit board
of the unit, is used to connect the alarm points to the desired
group alarm output (A or B alarms). In the case of normally closed
sensor contacts, a wire link in the actual channel circuitry has
to be cut off.
SECURITY
LH-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.
Testing for normal function is carried out by pressing the black
test button, which simulates faults on the alarm channels of the
system. 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.
SPECIFICATIONS
| Supply voltage: |
110V DC ± 20% |
| Supply current: |
Normal condition 0.02A, Alarm condition
0.25A |
| Time delay: |
0,5 - 20 sec. adjustable common
line for each alarm group |
| Number of alarm groups: |
Max 2 per panel (A and B alarms). Selection
device on each alarm channel. |
| Output contacts: |
Each alarm group has 1 set of closing
contacts. Contact rating 100V, 100VA, resistive load. |
| Front: |
Natural colour anodised aluminium |
| Legends: |
Film legend 24x32 mm or engraved on lamp
screen |
| Lamps: |
Ba9s 130V 20mA |
| Main dimensions: |
88x482x140 mm |
| Panel recess: |
64x445 mm |
| Max permissible external
cable resistance: |
500 ohm |
| Ordering Instructions: |
12032 LH 10 |
| Extra accessories: |
1022
Relay circuit board for an interface to computer or 10 remote
alarms |
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PRODUCTS