<23 halstrup wa cher Data sheet PUC 28 / PUC 28 K - Date: 07 / 2018 - Subject to technical changes without notice Features • Process panel (Aluminium, anodised) for displaying air-conditioning data • Integrated, high precision measurement of differential pressure • % rH /° C transmitters switchable (independent of manufacturer) • Anodised, aluminium housing with easy-to-clean front surface • PUC 28 K model: 2 pressure ports at the front panel for readjustment of the pos. / neg. final value • 3 analog outputs, optional digital interface • Acoustic alarm when the threshold value is exceeded, acknowledgement via key • Optical alarm signal if critical values are exceeded (cyclically inversed / normal) • Bilingual menu (English / German) (others on request) • 2 contact points (6 A/ 230 VAC) • 2 adjustable limit switches permit the connection of signalling devices and save additional wiring Measurement ranges Supply voltage 24 V DC, ± 10 % smoothed Output 0 .. 10 V(R, > 2 kO) 0 / 4 .. 20 mA (R , < 500 O) adjustable 2 contact points, 6 A, 230 V AC, may be configured as desired within this pressure range 11 "K": with externally accessible pressure calibration ports (no disassembly) (see photo) enter key scroll to the right scroll to the left Data interface none PROFiBUS DP (optional) 2) RS 232 (optional) Bus connection none 9-pin Sub-D flush type connector 31 sub-D plug with 150 mm cable round pin connector M 12 with 150 mm cable 31 not suitable for wall thicknesses greater than 5 mm Can be pre-set on request: Time constant, relay parameter, analogue output, deactivation of the cyclic zeroing (only for PROFIBUS DP) 15

Measurement of differential pressure is useful in a broad range of applications. It is used in ventilation and air-conditioning technology but also in many areas of air handling process technology. The next pages show a number of these. You can find more information about our pressure sensor technology on p. 6. halstrup-walcher offers a wide range of products for stationary measurement of differential pressure: Process monitoring for clean-rooms (Pa, ° C, % rH), with stainless steel front Process monitoring panel aluminium, anodised (optional: with calibration port) (Pa, ° C, % rH) High precision,...