BA_X022
Operating instructions
EUROTEC Antriebszubehör GmbH | Bildstock 37 | DE-88085 Langenargen | [email protected] | www.eurotec.global | 29.10.2020 | Page 2 of 5
Thank you for choosing a EUROTEC product. In doing so, you have chosen a quality product. To ensure functionality and your own safety,
please read these operating instructions carefully before beginning with the installation. Nevertheless, should you have any further
questions, please contact:
EUROTEC Antriebszubehör GmbH | Tel. +49 (0) 7543 93463 - 0 | Fax. - 10 |
|
www.eurotec.global
1.
Device description
Limit switch boxes serve to provide feedback and control the position of industrial valves, which are activated using pneumatic actuators.
The shaft of the limit switch box has a positive connection with the shaft of the actuator and is rotated with the rotational movement of the
actuator. The actuating cams attached to the shaft, activate the installed sensors, which support the electronic signal transmission.
The flex Ex eb ia limit switch boxes are equipped with 1 to 4 Ex ia certified intrinsically safe proximity switches. That includes 1-4 inductive
proximity V3-sensors, 1-3 slot type sensors, 1-2 cylindrical sensors or 1 dual sensor.
2.
Intended use
The flex Ex e ia limit switch box from the EUROTEC Antriebszubehör GmbH is intended for use in the explosive area of zones 1 and 2 with
gases, mists or vapours and zone 21 and 22 with combustible dust.
ATEX / IECEx
EAC Ex (TR-CU-012)
II 2G Ex eb ia IIC/IIB T4-T6 Gb
1 Ex e ia IIC <<T6…T4>> Gb X
II 2D Ex tb IIIC T80°C-T135°C Db
Ex tb IIC T80°C/T95°C/T130°C Db X
EPS 16 ATEX 1012 X / IECEx EPS 16.0006 X
Its approved for use in the following ambient temperature ranges:
T6/T80°C:
-55°C/-25°C...+40°C
T5/T95°C:
-55°C/-25°C...+60°C
T4/T135°C: -55°C/-25°C...+75°C
The approved ambient temperature varies, depending on the sealing compound and the installed switch type. You can find the ambient
temperature in the corresponding data sheet and on the product label. For the use to a minimum ambient temperature of -25°C the limit
switch boxes type EFX can also be fitted with a viewing glass in the cover housing. A lower temperature range down to -55°C applies to limit
switch boxes, which are made of components, that are at least suitable for this temperature.
The electrical input ratings are determined by the separately certified intrinsically safe inductive sensors that are used. You will find the
values for Ui, Ii, Pi, Ci and Li on the product label of your limit switch box as well as in the instruction manual of the sensor.
3.
Labeling
The labeling on the housing is shown in Fig. 1 and varies depending on the installed switch type. You can find the number of the indicated
responsible office for the QM system and the serial number below the CE mark. It consists of the year of manufacture and the respective
order number.
Fig. 1: Labeling
The housings are not intended to be used as stepladders, to climb into the system. This can lead to damaging
them and having a negative effect on their function. If the housing is damaged, water as well as dirt and
combustible material can accumulate inside the housing. This can lead to a short circuit. Furthermore, the
device can heat up severely due to the accumulation and can cause an explosion.
