PSW2000

Supported Applications

The Omega PSW2000 is a digital pressure switch with display and solid-state sensor designed to monitor system pressures. It provides up to two switching outputs and one analog output for process control applications. The device features menu operation via three front keys, allowing configuration of setpoints and parameters directly at the instrument.

According to documentation, the PSW2000 is intended for use in systems where the maximum pressure (Pmax) is not exceeded. It is explicitly noted that this device is not designed to be used as the sole safety element in pressurized systems according to PED 97/23/RC.

Operating Conditions & Performance

The PSW2000 series operates on a power supply of 15...32 V DC. The measurement range is documented as 0 ... 400, with the specific unit selectable via configuration (mbar, psi x 10, hPa, bar, psi, mPa). The device features an analog output scaling capability where the start value corresponds to the display initial value and the end value scales accordingly; a maximum turn-down of 4:1 is specified. At values below 25% of the measuring range, the analog output switches off.

Physical dimensions for the series are listed as an overall length of 118 mm (4.64 in) and a diameter of Ø 30 mm (1.18 in). The electrical connection utilizes a Plug 4-pin, M12 x 1 interface. Specific performance metrics such as accuracy class, repeatability, hysteresis, response time, operating temperature limits, and wetted materials are not provided in the available source documentation.

Configuration Options

The PSW2000 series is offered with configurable output configurations to meet specific monitoring needs. Available models include:

• Model with 1 switching output (SP1): Provides a single SP1 signal rated at 0,5 A max.
• Model with 2 switching outputs (DESINA®): Includes both SP1 and SP2 signals, each rated at 0,5 A max.
• Model with 1 switching output and 1 analog output: Combines an SP1 signal (0,5 A max.) with a configurable analog output.

The series supports various process connections including G1/4, 1/4" - 18 NPT, and 7/16 - 20 SAE. Configuration options allow for window technology or standard evaluation on switching outputs SP1 and SP2. Users can define switch-on (on) and switch-off (OF) points independently; if the ON value is smaller than the OFF value, the switching point evaluation becomes falling.

Additional configurable features include:

• Delays: Switch-on delay (dS1/dS2) and switch-off delay (dr1/dr2) adjustable from 0.0 s ... 9.9 s.
• Inversion: High-level-fail-save (HFS, normally open function) or low-level-fail-save (LFS, normally closed function).
• Analog Scaling: Start value (RO2) and end value (ROF) scaling for the analog output.
• Data Logging: Display of peak values "Max" with a maximum capacity of 125% f.s., including memory deletion options.

Key Product Differences

Variation within the PSW2000 series is primarily defined by the output configuration and process connection type. The electrical pinout varies based on the selected model:

• Pins 1 & 3: Consistently assigned to Power (Pin 1: 15...32 V DC) and Ground (Pin 3: 0 V).
• Pin 4: Assigned to SP1 (0,5 A max.) across all models.
• Pin 2: Varied by model; unused in the single-switching-output version, assigned to SP2 (0,5 A max.) in the dual-switching-output version, and assigned to analog output in the mixed-signal version.

The series includes error display capabilities for conditions such as exceeding positive/negative measuring range, sensor errors, switching output errors, data errors (EEProm), program errors, calibration errors, and analog out errors. Approvals listed include ISO 9001 Certified and ISO 9002 Certified.