2
Operating instructions
Magnetic reed switches
BN 325-R(G)
EN
For safety reasons, invasive work on the device as well as arbitrary
repairs, conversions and modifications to the device are strictly
forbidden; the manufacturer shall accept no liability for damages
resulting from such invasive work, arbitrary repairs, conversions and/or
modifications to the device.
2. Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
BN 325-R
➀
-
➁
No.
Option
Description
➀
without LED
G
with LED
➁
Blade terminal 4,8 mm and 1 shielding plate
1239
Blade terminal 4,8 mm and 2 shielding plates
1389
Blade terminal 6,3 mm and 2 shielding plates
1279
Cable outlet left and 2 shielding plates
1279-2
Cable outlet right and 2 shielding plates
LST-1279
Cable with connector, -1279 like above
Only if the information described in this operating instructions
manual are realised correctly, the compliance with the Low
Voltage Directive is maintained.
2.2 Special versions
For special versions, which are not listed in the order code below 2.1,
these specifications apply accordingly, provided that they correspond to
the standard version.
2.3 Purpose
Magnetic switches are preferably used wherever mechanically operated
limit switches do not feature a satisfactory operation due to the
unfavourable operating conditions. In the elevator industry, magnetic
switches are preferably used for positioning and control purposes.
For actuating the magnetic swtches, the actuating magnets listed
by Schmersal (refer to Automation technology catalogue) can be
used. Depending on the chosen combination of magnetic switch and
actuating magnet, the switching distances and travels may vary.
2.4 Technical data
Standards:
−
Enclosure and cover:
glass-fibre reinforced thermoplastic
Protection class:
- Ordering suffix -1239 and -1389:
IP00
- Ordering suffix -1279 and -1297-2:
IP67
Termination:
- Ordering suffix -1239:
Blade terminal 4.8 mm
- Ordering suffix -1389:
Blade terminal 6.3 mm
- Ordering suffix -1279 and -1279-2:
Cable outlet
- Ordering suffix -LST-1279:
Cable with connector
Operating principle:
magnetic
Switching voltage:
max. 250 VAC
Switching current:
max. 3 A
Switching capacity:
max. 120 VA
Sparkover voltage:
> 600 VAC (50 Hz)
Switching speed:
max. 18 m/s
Switching frequency:
max. 300 /s
Switching time “Close“:
max. 1.5 ms
Switching time “Open”:
max. 0.5 ms
Bounce duration:
0.3 ... 0.6 ms
Ambient temperature:
– 25 °C … + 75 ºC
Mechanical life:
1 billion operations
Electrical life:
1 million - 1 billion operations,
depending on load
Resistance to shock:
50 g / 11 ms
Resistance to vibration:
30 g on sine wave oscillation
Resistance to vibration:
10 ... 55 Hz, amplitude 1 mm
Switching point accuracy:
± 0.25 mm, T = constant
3. Mounting
3.1 General mounting instructions
The installation may only be carried out by authorised
personnel.
• Any mounting position.
• Do not install the magnetic switch and the actuating magnet in strong
magnetic fields
• Keep away from metal chips
• Do not expose the magnetic switch and the actuating magnet to
strong vibrations and heavy shocks
• Do not use the magnetic switch and the actuating magnet as end stop
• The mounting distance between two sensors should always be at
least 30 mm.
When using more than one magnet switch, consider figures
next page.
3.2 Dimensions
All measurements in mm.
Blade terminal
8
26
10
8
(9)
24
10
85
30
9
M 4
a
b
b
PIN 2
PIN 1
Cable outlet
9,8
9
9
ø 9
M 4
a
a
c
c
d
d
LED
13
LED
Key
a Shielding plate
b Blade terminal
c Cable outlet left (Index -1279)
d Cable outlet right (Index -1279-2)
