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PAX-2S Strain Gauge Amplifiers

Dual Line Strain Gage Input Panel Meter

About the PAX-2S Strain Gauge Amplifiers

The PAX-2S Strain Gage Panel Meter offers many features and performance capabilities to suit a wide range of industrial applications. The PAX-2S has a strain gage input to handle various types of bridge configurations including load cell, pressure and torque sensors. The optional plug-in output cards allow the opportunity to configure the meter for present applications, while providing easy upgrades for future needs.

Highlighting the PAX-2S is a dual line, display with a large 0.71", tri-color 6 digit top display line and a 0.35", 9 digit green bottom display line. The meter also offers programmable units display, providing capability to tag the display with units of measure. Display color change capability provides machine operators a visual display of changing conditions, even when the operator is not close enough to read the actual display value. In addition, a universal power supply provides the ultimate in flexibility for both AC and DC power.

The meter provides a MAX and MIN reading memory with programmable capture time. The capture time is used to prevent detection of false max or min readings which may occur during start-up or unusual process events. The signal totalizer (integrator) can be used to compute a time-input product. This can be used to provide a readout of totalized weight or calculate service intervals of motors, pumps, etc.

The meter has up to four setpoint outputs, implemented on plug-in option cards. The plug-in cards provide dual FORM-C relays, quad FORM-A, or either quad sinking or quad sourcing open collector logic outputs. The setpoint alarms can be configured to suit a variety of control and alarm requirements.

The PAX2 can be programmed to utilize Modbus protocol. With Modbus, the user has access to all configuration parameters. Readout values and setpoint alarm values can be controlled through the bus. Additionally, the meter has a feature that allows a remote computer to directly control the outputs of the meter. Communication and bus capabilities are also available as option cards. These include RS232, RS485, DeviceNet, and Profibus-DP.

The PAX2 includes a built-in USB programming port. With a Windows® based program, made available by Red Lion Controls, configuration data can be downloaded to the PAX2 without the need of any additional option cards.

A linear DC output signal is available as an optional plug-in card. The card provides either 20 mA or 10 V signals. The output can be scaled independent of the input range and can track either the input, totalizer, max or min readings, or any setpoint value. After the meter has been initially configured, the parameter programming may be locked out from further modification in its entirety, or allowing selected values accessible for quick entry.

The meter has been specifically designed for harsh industrial environments. With NEMA 4X/IP65 sealed bezel and extensive testing of noise effects with regard to CE requirements, the meter provides a tough reliable application solution.


Key features PAX-2S

  • Load cell, pressure and torque brigde inputs
  • Universal AC/DC power supply
  • Selectable 5 VDC or 10 VDC bridge excitation
  • Programmable auto-zero tracking
  • 6/9 digit dual line/tri-color display with 0.71" and 0.35" digits
  • Programmble units display
  • Variable contrast and intensity display
  • Up to 160 ssamples per second conversion rate
  • Buit-in USB programming port enabling unit configuration with crimson programming software
  • IP65 sealed front bezel


Supply Voltage
40-250 VAC 50/60 Hz; 21.6-250VDC
Enclosure for control panel mounting
Dimens. [mm]
97 x 50 x 105
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