Common alarm indicator LSE

		Description Function diagram Schematic Programming Dimensions Technical data Downloads Link to the successor model
Common alarm indicator LSE

Important information regarding the LSE common alarm indicator

This version is no longer produced, the current version can be found here

Description

General

The LSE Common Alarm Indicator is designed to signalise technical faults. The units are front mounted in a standard cut-out. All electrical connections are realised by plug-in screw terminals on the back of the unit. Therewith, unit changes and mensurations are easily to realise. To build larger systems with a higher amount of inputs than a single device offers, it is possible to connect up to twelve units. The front is equipped with 8 or 16 red alarm LED's and one green LED to indicate the normal condition. In addition to this, buttons for the lamp test, horn acknowledgement and a buzzer are built in. The acknowledgement and lamp test can also be realised by external buttons. The unit provides one potential free contact (NO) for the audible device / horn and two contacts (NO) for group and common alarm with the same potential. The supply- and signal voltage is available in many different varieties. As an option the units are available with output relays. It is also possible to produce the Common Alarm Indicator without buttons and buzzer or with a time delay for all inputs.

Function

Common alarm
The common alarm relay is active as long as a signal input is active. If the unit works in a network the relay is activated by every signal input in the whole system. The relay switches off when all signal inputs are off.

Group alarm
The group alarm relay is active as long as a signal input of the own device is active. The relay switches off when all signal inputs of the unit are off.

Lamp test
The lamp test button activates all LED's for about 4 seconds. If several units are connected together the lamp test is overlapping.

Audible device / horn
The internal buzzer and the horn relay are activated by the signal inputs. The way in which the relay and the buzzer switches off is programmable as followed:

DIP switch 2 off
The relay stays active until acknowledgement, even when the signal inputs went off meanwhile. Acknowledgement is possible with the HQ button or an external switch.

DIP switch 2 on
The relay stays active as long as a signal input is active or until acknowledgement. Acknowledgement is possible with the HQ button or an external switch.

Signal inputs
The signal inputs can be changed in two groups from NO normally open to NC normally closed with the DIP switch No. 3 and 4. Units with 8 signal inputs have two groups of 4 inputs, units with 16 signal inputs have two groups of 8 inputs which can be programmed.

Output relays (optional)
The output relays are connected to the signal input carrying the same number. The relays are working as an image of their inputs.

Function diagram

Schematic

Please click on the image for a larger view or go to the download of the wiring diagram sheet

Common Alarm Indicator with 8 inputs / LED's / external signal voltage

Common Alarm Indicator with 16 inputs / LED's / external signal voltage

Common Alarm Indicator with 8 inputs / LED's / internal signal voltage

Common Alarm Indicator with 16 inputs / LED's / internal signal voltage

Parallel connection

To build larger systems, it is possible to connect up to twelve units. The horn acknowledgement, the lamp test, the common alarm relay and the horn are activated overlapping. The connectors are used as follows:

Connector 26: Not used
Connector 27: Horn acknowledgement (external and overlapping)
Connector 28: Lamp test (external and overlapping)
Connector 29: Not used
Connector 30: Not used
Connector 31: Common alarm relay activation
Connector 32: Horn activation
Connector 33: Ground

Programming

The programming of the LSE Common Alarm Indicator is effected by a DIP-switch as followed:

LSE

Please note that the supply voltage must be switched off and on to activate the programme!

Dimensions

H	B	H1	B1	ET	T1	T2
144 mm	72 mm	136 mm	65 mm	164 mm	154 mm	8.5 mm

Technical data

Amount of signal inputs	8 / 16
Type of signal inputs	Changeable between NO/NC in two groups
Supply voltage nom.	24VDC	24VAC	60VDC	110VDC	230VAC
Supply voltage range	20-30VDC	22.5-30VAC	51-78VDC	93-127VDC	207-253VAC
Power consumption	6.3W	6.3VA	13W	11W	11 /VA
Frequency (AC units)	40-60Hz
Signal voltage nominal	24VDC	24VAC	60VDC	110VDC	230VAC
Signal voltage tolerance	18-30VDC	18-30VAC	51-78VDC	93-127VDC	170-250VAC
LED colours	Red / special colours on request
Blink frequency	2Hz
Switching capacity relays H/Gr/Sa	AC:1000VA / DC:300W
Switching capacity relays M1-M16	AC:250VA / DC:125W
Ambient temperature	-20 - +65°C
Mounting position	Any
Protection class	Housing: IP40 / Connectors: IP20
Connectors	Plug-in screw terminals 4mm² (2x1.5mm²)
Weight	800g to 1400g
Dimensions WxHxD	144x72x164mm
Front panel cut-out	138x68mm