51D
Pneumatic electronic pressure switch
info@nortrade.ro | +40 31 425 17 06/07
info@nortrade.ro | +40 31 425 17 06/07
Electronic pressure switches and sensors deliver digital precision where electromechanical units only give a binary signal: a calibrated pressure reading on a multi-colour TFT display, IO-Link parameter configuration, configurable 2 × digital outputs (PNP/NPN), and optional 4-20 mA analogue. Norgren's range covers the full industrial spectrum: pneumatic-only 51D, 54D and the electro-mechanical 20D for compressed-air systems; multi-fluid 34D, 60D, 60S up to 600 bar with hydraulic / aggressive-media compatibility; and the Excelon Plus Q84G IEPS as a stand-alone modular pressure sensor that drops directly into the FRL stack. All units are UL listed with high overpressure resistance and wide temperature range.
Pneumatic electronic pressure switch
Pneumatic electronic pressure sensor
Electro-mechanical pneumatic pressure switch, -1…25 bar
Pneumatic / hydraulic / all-fluid electronic pressure sensor
Pressure switch with IO-Link
Pressure sensor (analogue)
Stand-alone Excelon Plus electronic pressure sensor module
IO-Link is a digital point-to-point communication protocol that lets the PLC read and write sensor parameters directly: set-point, hysteresis, units, output state, even calibration data. With 4-20 mA analogue you only get the pressure reading — you set everything else by hand on the display. With IO-Link you re-configure the sensor remotely from the PLC, log all event data, and a swapped-out replacement sensor auto-configures from the master's stored parameters in under a second.
Match the maximum operating pressure of your system to the mid-to-upper third of the sensor's range — that gives the best resolution and overpressure margin. For pneumatic compressed-air systems (typically 6-10 bar working pressure), the 51D / 54D range (and the electro-mechanical 20D, -1 to 25 bar) is correct. For hydraulic systems (50-300 bar typical) or process control with high-pressure liquids, use the 34D (up to 600 bar) or 60D / 60S (up to 400 bar).
The Q84G is designed for the Excelon Plus Modular System — it physically interlocks with adjacent FRL modules. For stand-alone use outside an FRL stack, choose the 51D or 54D for compressed air (or the electro-mechanical 20D, -1 to 25 bar), or the 60D / 60S / 34D for multi-fluid applications. The Q84G's value is in its drop-in, no-extra-port integration with Excelon Plus.
Typical full-scale accuracy is ±0.5% to ±2% FS depending on series and configuration — see the individual datasheet for the specific part number. Temperature coefficient is around 2% FS per 25°C swing for the 51D, and tighter for the multi-fluid 34D / 60D / 60S. The ±2,5 ms response time is fast enough for most cycle-control applications but check the datasheet if you're doing high-speed pneumatic actuation.
A pressure switch outputs a digital binary signal — "above set point" or "below set point." A pressure transducer (or sensor) outputs an analogue or digital reading of the actual pressure value. Modern electronic units like the 34D, 60D and Q84G can be configured to do either via IO-Link — same hardware, different firmware mode. The 60S is sensor-only; the 51D / 54D / 18D / 8D are switch-mode focused.
