ASZ 3420 r
8Pages

ELECTRNONIC PRESSURE SWITCH WITH SPDT RELAYS DESCRIPTION ASZ 3420 r is an electronic pressure switch with traditional SPDT relay outputs. High quality silicon piezoresistive sensor and a microcontroller based electronic board provide a highly flexible and configurable solution for local equipment control. User is able to choose from a wide variety of relay triggering algorithms and adjust setpoints and hysteresis values (*). Additionally, an industry standard 4-20 mA analog output is provided, thus ASZ 3420 r is a pressure switch and a transmitter at the same time, making this model stand out in comparision to conventional mechanical switches. SPECIFICATIONS Pressure ranges: 40 mbar up to 600 bar Setpoints, hysteresis: adjustable (*) Basic accuracy: ±0.25% Relay outputs: SPDT, 2 pcs Analog output: 4...20 mA (3-wire); Sensor: silicon piezoresistive Pressure port: M20x1.5; G1/2”; G1/4”; 1/4” NPT etc. Media temperatures: -40...+125 °C APPLICATIONS Industrial equipment protection Tank liquid level maintaining Pressure monitoring and control Pumps, fans local control (*) set points can be set either by factory or by user via PCON 200 adapter (sold separately) Appearance, mounting kit contents and/or specifications are subject to change without prior notice. We are constantly working on further improvement of our products. Delivery is subject to standard terms of delivery. © 2020 Piezus Page 1. Version: 11.0 Date: 20.05.2020

Accuracy, % of span* Temperature effect, (% of span / 10 °C) Compensated range Power supply effect (rated supply voltage - 24 V ± 10%) Load resistance effect ≤ ±0.05% of span / kOhm Long term stability ≤ ±0.1% of span / year Startup time (after power up) less than 0.2 s Responce time (10...90 %) ≤ 60 ms * Accuracy includes non-linearity, hysteresis and non-repeatability. OPERATING CONDITIONS Medium temperature (depends on seals) Ambient temperature Storage temperature Vibration resistance Shock resistance Pressure sensor service life Switch contacts service life (electric), load dependent:...

MECHANICAL SPECIFICATIONS Pressure port material Housing material Seal Diaphragm Wetted parts Pressure port Electrical connection Cable diameter Wire cross section Ingress protection Dimensions, mm, max Weight, max ELECTRICAL SPECIFICATIONS Power supply (US), V Power consumption, max Analog output: Number of analog measuring channels Output signal Emergency output mode Load resistance (RL), Ohm (±20 %) Galvanic isolation resistance, MOhm, min. Relay outputs (SPDT): Number of relay outputs Relay contact type (version chosen when ordering) Max switching voltage Max switching current (contact...

ELECTRICAL CONNECTIONS / PIN ASSIGNMENT M12x1 (4 pins): Relay 1 Relay 2 M12x1 (5 pins): Power + Power Communication interface Analogue output ELECTRICAL CONNECTIONS, DIMENSIONS (mm) Housing of transmitter with welded sensor is 8 mm longer Page. 4. Version: 11.0 Date: 20.05.2020

PRESSURE PORTS, DIMENSIONS (mm) M20x1.5; G1/2” EN 837 Page. 5. Version: 11.0 Date: 20.05.2020

ORDERING CODE MEASUREMENT TYPE Gauge Absolute Vacuum, LRL = -1 bar NUMBER OF SWITCH OUTPUTS / CONFIGURATION 0.25% (P > 0.4 bar) (standard) 0.50% (P ≤ 0.4 bar) (standard) Other (specify when ordering) ELECTRICAL CONNECTION OUTPUT SIGNAL bar kg/cm2 mWC kPa MPa Other (specify when ordering) Page. 6. Ordering code. Version: 11.0 Date: 20.05.2020 1 relay output (NO) 1 relay output (NC) 2 relay outputs (NO/NO) 2 relay outputs (NO/NC) 2 relay outputs (NC/NC) M12x1, straight connector Other (specify when ordering)

ORDERING CODE (CONTINUED) PRESSURE PORT M20x1.5 DIN 3852 (standard) M20x1.5 EN 837 (standard) G1/2” DIN 3852 (standard) G1/2” EN 837 (standard) G1/4” DIN 3852 (standard) G1/4” EN 837 G3/4” DIN 3852 flush diaphragm G1/2” DIN 3852 open port 1/4” NPT 1/2” NPT Other (specify when ordering) FKM (-25...+125 °C) (standard) NBR (-25...+100 °C) EPDM (-40...+125 °C) Welded sensor (no seals -40...+125 °C) Other (specify when ordering) Standard Other (specify when ordering) PZ 1024 Power supply unit PCON 200 Programming adapter Page. 7. Ordering code. Version: 11.0 Date: 20.05.

PRESSURE SWITCH ORDER FORM ORDERING CODE CONFIGURABLE FEATURES AND FUNCTIONS Relay outputs operation logic (Sout) depending on input pressure (P). Window mode Hysteresis mode Pulse mode Note: The default mode is A. Sout at „0“ means that the relay output state corresponds to that specified when ordering (NO or NC). Sout at „1“ means the switching output state changed. Relay outputs operating mode parameters (one mode selected): Mode A: Hysteresis Mode C: Pulse Mode Customer Order number: Company: Phone / fax / e-mail: Contact person Parameter Level ON Level OFF Delay ON Delay OFF Upper...