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During operation:
9. Keep this document available at the place of use.
10. Observe the safety information.
11. Operate the product in accordance with this document.
12. Operate the product in accordance with the specifica-
tions.
13. Maintain the product correctly.
14. Do not carry out any servicing work and repairs not de-
scribed in this document without consulting the manu-
facturer first.
In cases of uncertainty:
15. Consult the nearest GEMÜ sales office.
3 Product description
3.1 Construction
1
2
3
4
Item
Name
1
Cover
2
Base
3
Operating bush
4
Guide piece
3.2 Description
The GEMÜ 1205 electrical position indicator has electro-
mechanical microswitches in a flameproof enclosure. Two
valve positions, open and/or closed can be remotely indic-
ated.
3.3 Function
The GEMÜ 1205 is used to indicate and check the position of
valves operated with pneumatic linear actuators. The spindle
of the electrical position indicator is positively connected to
the spindle of the linear actuator and is moved with the linear
movement of the actuator. The cam attached to the spindle
activates the built-in microswitches, which are used for elec-
tronic signal transmission.
Depending on the version, the electrical position indicator is
equipped with 1 to 2 microswitches.
www.gemu-group.com
4 Correct use
Improper use of the product!
▶ Risk of severe injury or death.
▶ Manufacturer liability and guarantee will be void.
●
The GEMÜ 1205 electrical position indicator is designed for
use in potentially explosive atmospheres of zones 1 and 2
with gases, mists or vapours and zones 21 and 22 with flam-
mable dusts.
The product has the following explosion protection marking:
Gas:
Dust:
EC type examination
certificate
For special conditions and operation limits see EC type ex-
amination certificate.
The product can be used in the following ambient temperat-
ure ranges: T6/T80 °C: -30 °C...+60 °C
1. Use the product in accordance with the technical data.
Materials
Aluminium
4.1 Use in potentially explosive environments
diecasting
GEMÜ 1205 is certified in accordance with ATEX and has an
Aluminium
explosion protection approval according to 2014/34/EU (see
diecasting
"Technical data").
1.4104
The energy supply must be equipped with a switch or an
1.4305
overcurrent protective device in the system.
The product user is responsible for providing connections
that comply with standards as well as cable compatibility
and warning signs. Only Ex t or Ex e cable glands with prop-
erties corresponding to at least those of the housing must be
used (IP protection, ambient temperature, explosion protec-
tion class, thread type and size). The materials of the cable
glands must be compatible with the housing materials. The
cable glands must comply with at least IP65. The connection
is designed as M20. Installation, operation and servicing
must only be carried out by qualified trained personnel with a
strong knowledge of the type of ignition protection
"Flameproof enclosure" db, eb and tb. Do not repair the
device yourself if it is faulty. Instead, replace it with an equi-
valent new device. Repairs must only be carried out by the
manufacturer! The device must only be used if its materials
are resistant against mechanical and/or chemical influences
or corrosion under the respective operating conditions to
such a sufficient degree that the explosion protection is not
impaired or nullified.
5 / 20
DANGER
Danger of explosion
▶ Danger of death or severe injury.
Do not use the product as a step or
●
foothold.
Prior to commissioning, ensure that
●
the cover is fully closed and that the
housing and the O-ring are not dam-
aged.
WARNING
Only use the product in accordance with the operating
conditions specified in the contract documentation and
this document.
4 Correct use
II 2G Ex db eb IIC T6 Gb
II 2D Ex tb IIIC T80°C Db
IBExU18ATEX1008
GEMÜ 1205
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