s123_e.pdf

MAGNETIC CONTACTS

S-1, S-2, S-3

s123_e 10/06

The magnetic contacts consist of two

elements: magnetic sensor (reed

relay) and magnet. The reed relay,

which is situated near the magnet,

makes the electric circuit. Each of the

magnetic contact elements is placed

in an identical watertight enclosure,

the part with reed relay having

electric lead-outs (Fig. 1,2,3). Two

leads are connected to the reed

relay, and the other two (twisted)

represent a tamper loop.

Individual magnetic contacts differ in

the housing style and the way of

mounting. The S-1 is designed for

surface mounting and the S-2 & S-3

for flush mounting.

The magnetic contacts can be used

wherever required for controlling the

status of doors, windows and/or other

movable elements, e.g. for protection

or monitoring of access to particular

sites, spaces, facilities; in automatic

control systems, etc.

magnetic sensor

7,3mm

10,5mm

13,5mm

Ø 2mm

25mm

33,5mm

tamper loop

7,3mm

Fig. 1 Reed relay of S-1 magnetic contact in plastic housing

magnetic sensor

8mm

25mm

8,8mm

tamper loop

Fig. 2 Reed relay of S-2 magnetic contact in plastic housing

magnetic sensor

9mm

tamper loop

11mm

36mm

Fig. 3 Reed relay of S-3 magnetic contact in metal housing

INSTALLATION – Fig. 4

The magnetic contact element containing the magnet should be mounted on the movable part, while the

reed relay - on the stationary part of protected doors, windows, etc. Elements of the S-1 magnetic

contact should be attached to the surface by means of screws, suitable glue, or a two-side self-adhesive

tape. The S-2 & S-3 sunk magnetic contacts are designed for face mounting in such materials as wood

or plastic (Fig. 4). The walls, the magnetic contact is to be fitted in, should be at least 10 mm thick, so

as to ensure adequate stability for the elements mounted. To make holes for the S-2 magnetic contact,

use ø8mm drill, and for the S-3 magnetic contact - ø9mm drill. The S-2 is to be pressed in, while the S-

3, which has a thread, needs to be screwed in. The mounted magnetic contact elements can be

reinforced with a suitable glue.

In order to ensure correct functioning of the magnetic contact, the distance between magnet and reed

relay should not exceed 12-15mm for S-1 & S-2, and 15-18mm for S-3. Misalignment of the axes of

magnet and reed relay in cylindrical magnetic contacts should not be greater than 10mm for S-2 and

12mm for S-3.

Notes:

• You are in no case allowed to shorten (cut short) the element containing the magnet.

• Special care must be taken when installing reed contact part of the detector. It should not be

hammered into the slot, because the fragile component inside the detector might be damaged then.

• When screwing the S-3 reed relay in, the wire will get twisted; to prevent it from damage, make sure

that it has a sufficient spare length, or twist it in the opposite direction before installation so that it

can straighten out when mounted.

distance

max 15-18 mm

max

misalignment

12 mm

reed relay axis

magnet axis

magnet

wall thickness

min 10 mm

reed relay

Fig. 4 Example of face mounting of S-3 magnetic contact

HOOKUP – Fig. 5

Figure 5 shows two examples of connecting the magnetic contacts to the alarm control panel. The

recommended connection ensures better performance of the security system in case of tampering

attempts.

reed relay

Zone Z n

24h tamper line

Parametric

resistor

COM

Recommended way of magnetic

contact connection

Commonly used way of magnetic contact

connection

Fig. 5 Examples of connecting the S-3 magnetic contacts to alarm control panel

TECHNICAL DATA

Magnetic contact type .......................................................................................................................... NC

Maximum switchable voltage of reed relay......................................................................................... 200V

Maximum switchable current .......................................................................................................... 500mA

Maximum continuous (non-switchable) current .................................................................................. 1,5 A

Transient resistance ....................................................................................................................... 150mΩ

Rated power .....................................................................................................................................10 VA

Minimum number of switchings under load 1V, 10mA ............................................................1000x10 6

10V, 10mA ............................................................500x10 6

50V, 100mA ..............................................................2x10 6

100V, 100mA ............................................................2x10 6

Contact material.................................................................................................................. Ru (ruthenium)

SATEL sp. z o.o.

ul. Schuberta 79

80-172 Gdańsk

POLAND

Latest EC declaration of conformity

and product approval certificates

can be downloaded from Web site

www.satel.pl

tel. +48 58 320 94 00

info@satel.pl

www.satel.pl

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