3
BN 325-R(G)
Operating instructions
Magnetic reed switches
EN
3.3 Mounting set-up and actuating distances
Positioning of the switches when using more than one magnet switch
(actuating distance for all BN 325 with 2 shielding plates
at −20 °C ... +50 °C)
Fe
Magnet BP 15/2
30
30
Achievable switching distance, even by offset of the actuating magnet
max. 5
max. 5
Fe
Magnet BP 15/2
30
30
3-15
Maximum side-ways offset of two actuating magnets,
whereby the middle switch will not be affected.
3-15
5
5
Fe
Magnet BP 15/2
30
30
The specified switching distances are applicable for the
actuation of individually mounted components without ferro-
magnetic influence. A change of the distance, positive either
negative, is possible due to ferromagnetic influences. The
mutual interference between multiple actuating magnets must
be observed. (For specal versions: diverging values possible)
Magnetic switches with bistable contacts will only function correctly,
when a magnetic north (green) or south (red) pole goes past the active
surface. The NC or NO function depends on the actuating direction and
the polarity of the actuating magnet.
Further information on the switching distances can be found
in the Automation technology catalogue in appendix.
4. Rear side Electrical connection
4.1 General information for electrical connection
The electrical connection may only be carried out by authorised
personnel in a de-energised condition.
BN 325-R
BN 325-R-1239
BN 325-R-1389
BN 325-R-LST-1279
PIN 2
PIN 1
PIN 3
PIN 1
BN 325-R-1279
BN 325-R-1279-2
BN 325-RG-LST-1279
BU
BN
PIN 3
PIN 4
PIN 1
BN 325-RG-1279
BN 325-RG-1279-2
BK
BU
BN
BN
BU
BK
3
2
1
4
Inductive loads (e.g. contactors, relays, etc.) are to be
provided with suitable interference suppression circuitry.
4.2 Adjustment
In order to actuate the BN 325-R/-RG magnetic switch, a north or south
pole magnet should be used. The markings found on the actuating side
of the cover are used for adjusting the magnet to the switch. The coloured
symbols including arrows, show the proper magnet arrangements and
the actuating direction. The magnets have the corresponding coloured
markings. The markings found on the actuating side of the cover are used
for adjusting the magnet to the switch. The coloured symbols including
arrows, show the proper magnet arrangements and the actuating direction.
The magnets have the corresponding coloured markings. The magnets
have the corresponding coloured markings.
5. Set-up and maintenance
5.1 Functional testing
The function of the component must be tested. The following conditions
must be previously checked and met:
1. Check the correct fixing of the magnetic switch and the actuating magnet
2. Integrity of the magnetic switch and the actuating magnet
3. Check the switch enclosure for damage
4. Check the functionality of the switch
5.2 Maintenance
A regular visual inspection and functional test, including the following
steps, is recommended:
1. Check the functionality of the switch
2. Remove particles of dust and soiling
Damaged or defective components must be replaced.
6. Disassembly and disposal
6.1 Disassembly
The switch must be disassembled in a de-energised condition only.
6.2 Disposal
The switch must be disposed of in an appropriate manner in
accordance with the national prescriptions and legislations.
