Deutsch 
English The pressure limiters ÜB...A4 and NB...A4 are adjustable pressure monitors in accordance with EN 1854 for combustion systems. They are suitable for switching a circuit on, off or over when the actual pressure value changes in relation to the set setpoint. The setpoint (switching point) is set on a dial with scale. Measuring socket integrated in the metal housing as standard.
Function:
The switching mechanism responds to overpressure. Locking takes place when the pressure exceeds (OD) or falls below (LD) the set target value. The “Locked” switching status is indicated by a glow lamp. Restarting is only possible by pressing the reset button in the setting wheel on the pressure limiter once the operating pressure has been reached.
Technical data:
Max. Operating pressure: 500 mbar
Measuring connection: measuring socket integrated in the metal housing, ø 9 mm
Ambient temperature/mean temperature: -15 °C to +70 °C
Protection class: IP 54 according to IEC 529 (EN 60529)
Special version: Plug connection for cable sockets in accordance with DIN EN 175 301-308, 3-pole with earthing contact
Function:
The switching mechanism responds to overpressure. Locking takes place when the pressure exceeds (OD) or falls below (LD) the set target value. The “Locked” switching status is indicated by a glow lamp. Restarting is only possible by pressing the reset button in the setting wheel on the pressure limiter once the operating pressure has been reached.
Technical data:
Max. Operating pressure: 500 mbar
Measuring connection: measuring socket integrated in the metal housing, ø 9 mm
Ambient temperature/mean temperature: -15 °C to +70 °C
Protection class: IP 54 according to IEC 529 (EN 60529)
Special version: Plug connection for cable sockets in accordance with DIN EN 175 301-308, 3-pole with earthing contact