Technical Data - Aventics ATEX SN6 Série Notice D'instruction

AVENTICS | SN6 | R499050077-BAL–001–AI | English
4 About This Product
The SN6 sensor is a magnetic field switch with electrical connector.
The SN6 sensor is a proximity sensor and is generally used to query the position of
the piston in pneumatic cylinders that are operated in explosive atmospheres.
Switch operation is indicated by an illuminated diode in the SN6 sensor.
Product identification
Observe the product information on the product and packaging.
5 Transport and Storage
There are no special transport instructions for this product. Nevertheless, observe
the information in section 2 „Notes on Safety".
6 Montage
Danger of injury if assembled under pressure or voltage!
Assembling when under pressure or voltage can lead to injuries.
O Make sure that all relevant system parts are not under pressure or voltage
before assembly.
Observe the following safety information during assembly:
O Observe the Ex guidelines EN 60079-14.
O The installation of electrical devices must be carried out in accordance with
applicable national regulations and performed or supervised by an electrical
specialist (in compliance with TRBS 1203 or equivalent).
O First compare the information on the device with the information in the operating
instructions before installation.
O Take special care that no dirt or other foreign particles come into contact with the
electrical connector components or the sensor seal.
O Install the sensor protected against mechanical impact and UV light (depending
on the requirements/operating conditions).
O Install cables with protection or provide for strain relief. To avoid short circuits
and interruptions, prevent sharp bending in the connection cables and strands.
Installing the switch unit
1. Loosen the center screw in the electrical connector.
2. Loosen the electrical connector from the sensor.
3. Place the sensor on the appropriate clamp mounting
4. Fasten the sensor to the clamp mounting with the mounting screw.
Tightening torque for mounting screw: 1.5 Nm
5. Ground the switch unit if you install electroconductive clamp mountings.
Connecting the cable
1. Disassemble the electrical connector.
2. Carefully remove the cable sealing ring and center screw.
The electrical connector is equipped with connection terminals that may be
used as sleeve or flat terminals (screw head terminals). Preferably use wire
end sleeves for the sleeve terminals and cable lugs for the flat terminals.
Assign the terminals as shown in the wiring diagram
3. When feeding the cables through, make sure you comply with the component
3
order and their orientation
4. Connect the cables (see Technical Data).
5. Carefully insert the center screw. Make sure that the seal seat under the screw
head is not damaged.
Tightening torque for the plastic screw: 2.5 – 3.75 Nm.
6. Place the electrical connector on the sensor. Make sure that the sealing surfaces
on the sensor and electrical connector are not dirty and that the seal is in the
correct position.
Tightening torque for the center screw: 0.6 + 0.1 Nm
Setting the switch unit
1. Slide the clamp mounting on the pneumatic cylinder tie rod to set the appropriate
switch position (piston position).
2. Fasten the clamp mounting to the tie rod with two hexagonal socket-head
screws.
3. Check that the switch unit sits close to the cylinder.
High inrush current loads, such as those occurring with purely capacitive
loads such as in capacitors, cables with a length greater than 20 m, or
incandescent lamps, can be compensated for to a certain extent through the
use of a series resistor. Here, the series resistors limit the maximum value
of the switching current for the switch unit. Purely inductive loads should be
protected by a recovery diode on the load. We recommend using protective
circuits for capacitive and inductive loads, such as those from long cables
and relays/contactors according to safety information R412013397.
CAUTION
3
.
2
.
.
7 Commissioning
Before commissioning, make sure that the device and entire machine or system
comply with the EMC directive.
8 Operation
The given values for switching current and voltage (see Technical Data)
must not be exceeded.
9 Disassembly and Exchange
When ordering spare parts, include the ID number located on the devices (label,
rating plate).
If, by loosening the center screw, the electrical connector has been
separated from the sensor five times, the electrical connector and the flat
seal must be exchanged for original spare parts.
10 Service and Maintenance
The described sensors are maintenance-free.
11 Disposal
Scrap the device in accordance with local regulations.
12 Extension and Conversion
Do not change or modify the device.
13 Troubleshooting
O In the case of malfunctions, check the line connections and the operating voltage.
If the malfunction continues, proceed as follows:
1. Ensure that the device is not under pressure.
2. Disconnect the device from the power supply and hand the defective unit over to
a qualified person (see Personnel qualifications).

14 Technical Data

Voltage
Max. switching current
Switching position
Ambient temperature
Protection class
Display (diode)
Cable diameter
Cable cross-section
ATEX Zone 2
Zone 22
Further technical data can be found in our online catalog at www.aventics.com.
24 V DC ±10% / 230 V AC ±10%
100 mA
± 0.1 mm
–10°C to +50°C
IP65
Color: yellow
4.0 – 6.7 mm
2
0.5 – 1.5 mm
II 3G Ex nC nA IIC T4 Gc
II 3D Ex tc IIIB/IIIC T125°C Dc
-10 °C ≤ Ta ≤ 50 °C
4