Description; Function; Correct Use - GEM 4242 Operating Instructions Manual

3.3 Description

The GEMÜ 4242 combi switchbox is suitable for mounting to pneumatically operated linear actuators. Secure connection to
valve spindle means reliable feedback signal. Integrated pilot valves enable direct activation of the process valve connected to
them. Intelligent microprocessor controlled functions make commissioning and support during operation easier. The current
position of the valve is displayed via high visibility LEDs and fed back via electrical signals. The GEMÜ 4242 has been specially
designed for valves with a stroke of to mm.

3.4 Function

The GEMÜ 4242 combi switchbox shows the current position of the valve. When the valve is opened, the spindle in the combi
switchbox moves upwards and indicates that the valve is OPEN using the high visibility LEDs and communication interface.
When the valve is closed, the spring in the mounting kit pushes the spindle in the combi switchbox downwards and indicates
that the valve is CLOSED using the high visibility LEDs and communication interface.

4 Correct use

Danger of explosion!
▶ Risk of severe injury or death.
Only versions that have been approved according to their technical data may be used in potentially explos-
●
ive environments.
Improper use of the product!
▶ Risk of severe injury or death.
▶ Manufacturer liability and guarantee will be void.
Only use the product in accordance with the operating conditions specified in the contract documentation and this docu-
●
ment.
The GEMÜ 4242 with integrated pilot valve is designed for linear actuators. The product has a microprocessor controlled intel-
ligent position sensor as well as an analogue travel sensor system (potentiometer) which is positively connected with the ac-
tuator spindle by means of a mounting kit (spring, operating bush). The valve end positions and the integrated travel sensor
can be controlled via the electrical connections. The pneumatic valve actuator is directly activated by an integrated 3/2-way
pilot valve.
4.1 Product without special function X or Y
The product is not intended for use in potentially explosive areas.
4.2 Product with special function Y
The product with special function Y is UL/CSA certified and protected against explosion in accordance with ISA 12.12.01 (see
"Technical data").
The product with special function Y can be connected to switches, power supplies, PLC outputs and PLC inputs.
The energy supply must be equipped with a switch or an overcurrent protective device in the system. The switch or overcur-
rent protective device must be placed in a suitable and accessible position and also labelled as an isolating device for the
product with special function Y.
The product user is responsible for providing connections that comply with standards, a locking mechanism, cable compatibil-
ity and warning signs.
Suitable locking clips must be used to secure the circular connectors against becoming unintentionally loose or being
loosened without the use of tools
Installation, operation and servicing must only be carried out by qualified trained personnel.
Do not repair the device yourself if it is faulty. Instead, replace it with an equivalent 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.
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DANGER
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4 Correct use
GEMÜ 4242
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