Programmable pressure switch activates alarms
A
Keller UK product story
Edited by the Engineeringtalk editorial team
Jun 29, 2007
Keller's PA-22 PS pressure switch has an IP67 enclosure rating and affords 1.5 times calibrated range overpressure protection.
The PA-22 PS from Keller is a compact, programmable, electronic pressure switch.
The switch also has an analogue transducer output signal of 0.5-4.5V enabling continuous monitoring of the measured process as well as switch control.
The programmable switch functions can be used to activate alarms or control relays at the user's predetermined pressure levels.
Pressure ranges of 0-4bar to 0-400bar are available over an operating temperature of -40 to +125 C.
Wetted materials are 316L stainless steel making the switch suitable for operation with wet and aggressive pressure media.
The PA-22 PS has two independent switches for high/low control functions.
These are solid state and therefore not subject to wear.
Outputs are selectable PNP or NPN (factory set; to be specified upon order).
The optional dv-22 PP programmer (external supply) allows the user to change settings via two buttons and a simple menu system.
Alternatively, the programming unit is linked to a laptop or PC and can be used with Keller's Pressure Switch Console software.
The programmable functions for each switch are switching thresholds, hysteresis (window function), normally open / normally closed, and switching delay.
The PA-22 PS has an IP67 enclosure rating and affords 1.5 times calibrated range overpressure protection.
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