4
• The manufacturer assumes no liability or warranty for any consequences
caused by tampering with the product or incorrect use by the operator�
• Installation, electrical connection, set-up, operation and maintenance of the unit
must be carried out by qualified personnel authorised by the machine operator�
• Protect units and cables against damage�
For the scope of validity cULus:
The device shall be supplied from an isolating transformer having a secondary
Listed fuse rated either
a) max 5 amps for voltages 0~20 Vrms (0~28�3 Vp) or
b) 100/Vp for voltages of 20~30 Vrms (28�3~42�4 Vp)�
The Sensor shall be connected only by using any R/C (CYJV2) cord, having
suitable ratings�
3 Functions and features
The unit monitors the system pressure in pneumatic and compressed air networks
of machines and plants�
Applications
Compressed air (other media on request)
Type of pressure: relative pressure
Order no. Measuring range
Permissible
overpressure
Bursting pressure
bar PSI bar PSI bar PSI
PQ7809 -1���1 -14�6���14�5 20 290 30 435
PQ7834 -1���10 -15���145 20 290 30 435
MPa = bar ÷ 10 / kPa = bar × 100
Avoid static and dynamic overpressure exceeding the given overload
pressure by taking appropriate measures�
The indicated bursting pressure must not be exceeded�
Even if the bursting pressure is exceeded only for a short time, the unit
may be destroyed� NOTE: Risk of injury!
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