Pressure Switches

These pressure switches measure the pressure in hydraulic systems and convert it into electrical signals. All devices are provided with 2 outputs. While output 1 is a freely programmable switching output, output 2 can be selected as analogue output or switching output. The switching and reset points, the output logic and time delays can be programmed with the operating keys. Display and analogue output are equipped with adjustable damping for dynamic measurements

Versions

There are two different versions, which differ in the type of adjustment option.

Pressure switch with classic parametrisation
Part no. 9740 079
The desired switching and reset points are entered using a classic three-button control
panel. This version can be parameterised conventionally for all applications, independent of the pressurisation of the pressure switch.

Pressure switch with teach-in function
Part no. 9740 080
With the Teach-In procedure, a present pressure is stored in the pressure switch by pressing a button (Enter/Set button). This pressure value corresponds to the operating pressure. The pressure switch automatically calculates the optimum switching and reset points for output 1 (e.g. pump control / sequence control) and output 2 (e.g. machine control / release).
It is useful to adjust the operating pressure with the pressure relief valve. Detailed instructions can be found in the operating manual BA F9735. The factory setting is 10 % hysteresis (output 1)
and 20 % hysteresis (output 2). Automatic parameterisation at the touch of a button (Teach-In) allows the pressure switch to be adapted very quickly to changing pressures. Furthermore, setting errors are avoided.

Advantages

• IO-Link interface
• Two transistor switching outputs
• Analogue output with adjustable start and end point
• 4 x 7 segment LED display
• Continuous ACTUAL pressure display
• Accuracy < ± 0.1 % of the final value
• Teach-in function as an option
• Any mounting position
• Operating and display panel can be rotated by 345°
• Display in bar, psi or MPa
• Non-resetting cycle counter
• ‘Loc’ to prevent unwanted adjustment
• Self-monitoring function: Overload, cable break and sensor function
• Fast pressure peak detection > 600 measurements per second
• CE/UL/UKCA certification