Siemens 6DR5 Serie Kompaktbetriebsanleitung Seite 12

3.5.2 Friction clutch
Procedure
NOTICE
The following is applicable for the "flameproof enclosure" version:
● Move only the outer friction clutch. The inner friction clutch is fixed when using a flameproof enclosure.
● Do not open the flameproof enclosure of the positioner in explosion-prone atmospheres. An additional friction clutch is
therefore provided on the outside of the positioner axis. Move only the outer friction clutch.
After installing the positioner and commissioning it completely, set the torque of the friction clutch as follows:
1. Insert a commercially available, approximately 4 mm wide screwdriver in the slit of the yellow wheel on the module cover.
2. Move the yellow wheel anticlockwise using the screwdriver until it noticeably engages. This intensifies the torque of the
friction clutch.
3. A fixed friction clutch is characterized by an approximately 1 mm wide gap between the yellow and the black wheels.
4. For zero balancing, for example, after changing the actuator, first reduce the torque by rotating clockwise up to the end
stop of the yellow wheel. After zero balancing, fix the friction clutch again as described above.
3.5.3 Transmission ratio selector
Procedure
Lock the transmission ratio selector starting from the neutral position (condition at delivery) as follows:
1. Move the yellow wheel below the terminals using a commercially available, approximately 4 mm wide screwdriver
anticlockwise or clockwise depending on the 33° or 90° position that you have selected until it noticeably engages.
2. Note that the transmission ratio selector can now be moved only after unlatching the anchorage. You must therefore
bring the yellow ring back to the neutral position if you wish to move the transmission ratio selector, e.g. after changing
the actuator.
3.6 External position detection
WARNING
External position detection system
Versions with flameproof enclosures may not be operated with an external position detection system.
The aforementioned measures are not adequate in some applications. For example, continuous and strong vibrations, high
or too low ambient temperatures and nuclear radiation.
The position detection system and the control unit are mounted separately for these applications. A universal component is
available for this purpose. It is suitable for part-turn and linear actuators. You will require the following:
● An external position detection system with the order number C73451-A430-D78 comprising a positioner enclosure with
an integrated friction clutch, potentiometer as well as different blanking plugs and seals.
● Or a contactless explosion-proof non contacting system (e.g.6DR4004-6N).
● A positioner
● A three-pole cable to connect components.
● An EMC filter module with the order number C73451-A430–D23 is provided in a set along with cable clamps and M20
cable glands.
The EMC filter module is always used for the control unit whenever an external position detection system is used instead of
the internal position sensor. An external position detection system is, for example, a potentiometer with a 10 kΩ resistance
or a non contacting system.
12
SIPART PS2 (6DR5...)
A5E03436620-02, 01/2013