|Modell||In- och utgångar|
|Alpha 614||8 to 16 input channels voltage, current and strain gauge module|
|Alpha 630||20 input channels digital input and counter module with quadrature support|
|Alpha 631||20 input channels digital input, relay output and counter module with quadrature support|
|Alpha 634A||20 channel digital input, quadrature encoder and analog input module|
|Alpha 636||20 channel digital input, relay output, counter and analog input module|
|Alpha 640||8 analog output channels, 7 relay drive and 4 relay contact output module|
|Alpha 910||20 input channels voltage, current and thermocouple modules|
|Alpha 911||20 input channels voltage and current modules|
|Alpha 912||10 input channels voltage, current, RTD and full bridge strain gauge module|
|Alpha 933||18 channel digital input and high speed counter module|
|Alpha 934S||10 channel digital input, 3 quadrature encoder and 4 analog input module|
Alpha 614 Strain Gauge ModuleThe 614 and 614A provide 16 three-pole channels, which can be used for voltage or current measurement at up to 19 bit resolution and 1uV integrity. Pairs of these channels can be combined to make strain gauge measurements with six poles. Full, half and quarter bridge strain measurements are supported. The measurement resolution of a 350 bridge with two active gauges can be as high as 0.1uE. Strain energisation is by constant voltage with full remote sensing to eliminate lead and connector resistance errors. The bridge supply is directly derived from the A-D reference so that the effect of drift in these circuits does not affect measurement accuracy. Initial bridge unbalance can be compensated for. High quality cage clamp two part screw terminals are used for all connections.
• Strain, Voltage and Current inputs in compact DIN rail module.
• Up to 16 Voltage or 8 Strain channels
• 13 to 19 bit resolution.
• 200 to 10 measurements per second
• Programmable Measurement Types
• Full, half and quarter strain bridge support
• 120R to 1000R Gauges
• Auxiliary I/O expansion (614A option)
• Scaling, alarm levels, filter functions
• Second local diagnostic serial interface
• High speed communications
What is the Alpha 640 Analogue Output Module?The 640 output module provides eight 12 bit analog outputs, four individually isolated digital status or counter inputs and seven relay driver channels. The analog outputs offer unipolar voltage, bipolar voltage and current output ranges. Each output can be set to any of three ranges 0 to +10V , -10V to +10V or 4 to 20mA. By software commands. The analog outputs are isolated as a group from all other connections eliminating ground loop and other problems.
The relay driver outputs are suitable for direct connection to low power relays for general supervisory use. The isolated digital inputs can be used to return status information about the equipment being controlled by the analog outputs and can also be used as general purpose inputs. Counting and low frequency measurements are also possible on these inputs up to 1KHz pulse rates. The module is intended to be used as a general purpose output facility to compliment the Alpha Metrology input measurement modules. The firmware is structured to allow specific application code to be easily added for stand alone functions to create special versions with customer specified functions. If used with an Alpha Metrology input module, then a
combination of analog and digital input and outputs could be combined as a compact assembly, operating independently from the supervisory software on the host computer. Additional processing could be applied to inputs to create new measurement functions, and to outputs to control behaviour under different conditions. However the standard 940 module is controlled from the host computer as with other modules in the range, using the RS485 high speed serial communications.
The outputs can be individually calibrated with software commands without requiring access to within the module. Similarly the firmware within the module can be updated using a serial interface should this be needed to load a custom application.
• Isolated Analog output channels
• Digital status/counter inputs
• Relay drivers
• Second local diagnostic serial interface
• High speed comms 230KB (460KB)