Product Description; Construction; Description; Function - GEM 4242 Operating Instructions Manual

- Failure of important functions.
- Hazard to the environment due to the leakage of dangerous
substances.
The safety information does not take into account:
- Unexpected incidents and events, which may occur during
installation, operation and maintenance.
- Local safety regulations which must be adhered to by the
operator and by any additional installation personnel.
Prior to commissioning:
1. Transport and store the product correctly.
2. Do not paint the bolts and plastic parts of the product.
3. Carry out installation and commissioning using trained
personnel.
4. Provide adequate training for installation and operating
personnel.
5. Ensure that the contents of the document have been fully
understood by the responsible personnel.
6. Define the areas of responsibility.
7. Observe the safety data sheets.
8. Observe the safety regulations for the media used.
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 specifications.
13. Maintain the product correctly.
14. Do not carry out any maintenance work and repairs not de-
scribed in this document without consulting the manufac-
turer first.
In cases of uncertainty:
15. Consult the nearest GEMÜ sales office.
www.gemu-group.com

3 Product description

3.1 Construction

Size 1, 30 mm
1
2
3
4
5
Ite Name
m
1 Housing cover –
standard version:
2 Housing base
3 Electrical connec-
tion
4 Adapter piece
5 Mounting kit,
valve-specific
Seals

3.2 Description

The GEMÜ 4242 combi switchbox is suitable for installation
on pneumatically operated linear actuators. The position of
the valve spindle is reliably electronically detected and evalu-
ated using play-free and non-positive mounting. Integrated pi-
lot valves enable direct activation of the process valve con-
nected to them. Intelligent microprocessor-controlled func-
tions facilitate commissioning and support during operation.
The current position of the valve is displayed via high-visibility
LEDs and fed back via electrical signals.

3.3 Function

The GEMÜ 4242 combi switchbox controls the pneumatic ac-
tuator via integrated pilot valves and simultaneously indicates
the current position of the valve. Should the valve be opened,
the internally installed pilot valves control the pneumatic actu-
ator accordingly. The spindle in the combi switchbox con-
sequently moves upwards and indicates that the valve is
OPEN using the high visibility LEDs and communication inter-
face. Should the valve be closed, the internally installed pilot
valves control the pneumatic actuator accordingly. The spring
in the mounting kit simultaneously pushes the spindle in the
5 / 51
3 Product description
Size 2, 75 mm
Size 2, 30 mm
1
3
4
3
2
4
5
Materials
Size 1, 30 Size 2, 75
mm mm
PC PC
Anodized Stainless
aluminium steel
or stainless
steel
Threaded Threaded
piece: piece:
Stainless Stainless
steel steel
(1.4305) (1.4305)
Insert: PA Insert: PA
Stainless Stainless
steel steel
(1.4305) (1.4305)
Valve-spe- Valve-spe-
cific cific
materials materials
EPDM and NBR, EPDM
NBR and VMQ
1
2
5
Size 2, 30
mm
PC
Stainless
steel
Threaded
piece:
Stainless
steel
(1.4305)
Insert: PA
Stainless
steel
(1.4305)
Valve-spe-
cific
materials
NBR, EPDM
and VMQ
GEMÜ 4242