3M DFS 700 - External Warning Light System 07 07.doc Page 1 / 3

DFS 700 External Warning Light This is not an installation guide. It just should document what we have done to show the functionality. If we will be asked to sell such a solution many times, we have to discus a proper solution as an additional assorie for or costumers.

The integrated switch gear of the DFS 700 is an ON/OFF switch, which allows activating external devices. The socket of this switch is located under the upper service panel on the rear side of the DFS 700.

The ON/OFF switch can handle as a maximum 24 V AC/DC and max. 150 mA., what is not enough to switch the usual warning lights systems. An additional circuit is necessary to handle higher current.

Below is given an example for an LED Warning Light System. Also the way how to place the lights is just an example:

� Twofold Warning Light System The Multi-Light-LED with 150 mm diameter fulfills the European CEN-Norm EN 12352

• For 12/24 V rechargeable battery operation • For mounting on vehicles and equipment • Standardly set for synchronous operation • With automatic day/night adjustment, switchable to solar switch • The unit comprises a main and a secondary lamp

TECHNICAL DATA

Intensity day approx. 800 cd Average current consumption day 0,5 A/night 0,1 A (12V) Light colour amber Flash rate 60 fl./min Operating time with rechargeable battery 12 V, 88 Ah approx. 130 hrs

� Circuit to handle the current

6 Lamp 5 +12V 4 Switsch 3 Lamp + 2 Switch 1 GND

� Connection The picture shows the additional circuit shown as a red box powered by the DFS 700 battery. Two warning lights are connected to the red box and at least the ON/OFF switch of the DFS 700.

Due to the capacity of the battery it is recommend using the installation with the DFS 700 power supply.

J1

F1 2A

R1 2k

R2

1

00

k

D1 IRF530N/TO

1

2

3

6

5

4

3

2

1

3M DFS 700 - External Warning Light System 07 07.doc Page 2 / 3

Documentation pictures of the additional system

Possible solution to add the lights to the DFS 700

The circuit box in which we put the electronic circuit. Three cabels come out, one to the lights and the other two to the battery and to the ON/OFF switch. The box is inside the DFS 700 mounting box.

3M DFS 700 - External Warning Light System 07 07.doc Page 3 / 3

View inside the ciruit box with the electronic units.

Battery as power supply for the warning lights and the DFS 700