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Diamond Systems PR-Z32-E-ST Analog Input Ranges and Resolution, Overview, Input Range Selection

Models: PR-Z32-E-ST PR-Z32-EA-ST

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13.ANALOG INPUT RANGES AND RESOLUTION

13.1 Overview

Prometheus uses a 16-bit A/D converter. The full range of numerical values for a 16-bit number is 0 - 65535. However the A/D converter uses twos complement notation, so the A/D value is interpreted as a signed integer ranging from –32768 to +32767.

The smallest change in input voltage that can be detected is 1/(216), or 1/65536, of the full-scale input range. This smallest change results in an increase or decrease of 1 in the A/D code, and so this change is referred to as 1 LSB, or 1 Least Significant Bit.

The analog inputs on Prometheus have three configuration options:

♦Single-ended or differential mode

♦Unipolar or bipolar mode

♦Input range (gain)

The single-ended / differential and unipolar / bipolar configuration is done with a jumper on jumper block J13 (see page 45), and the input range selection is done in software.

13.2 Input Range Selection

Prometheus can be configured to measure both unipolar (positive only) and bipolar (positive and negative) analog voltages. This configuration is done with a jumper and applies to all inputs. In addition you can select a gain setting for the inputs, which causes them to be amplified before they reach the A/D converter. The gain setting is controlled in software, so it can be changed on a channel-by-channel basis. In general you should select the highest gain (smallest input range) that will allow the A/D converter to read the full range of voltages over which your input signals will vary. However, if you pick too high a gain, then the A/D converter will clip at either the high end or low end, and you will not be able to read the full range of voltages on your input signals.

13.3 Input Range Table

The table below indicates the analog input range for each possible configuration. The polarity is set with a jumper on jumper block J13, and the gain is set with the G1 and G0 bits in the register at Base + 3. The Gain value in the table is provided for clarity. Note that the single-ended vs. differential setting has no impact on the input range or the resolution.

Polarity

G1

G0

Input Range

Resolution (1 LSB)

Bipolar

0

0

±10V

305∝V

 

Bipolar

0

1

±5V

153∝V

Bipolar

1

0

±2.5V

76∝V

Bipolar

1

1

±1.25V

38∝V

Unipolar

0

0

Invalid

 

 

Unipolar

0

1

0 – 10V

153∝V

Unipolar

1

0

0 – 5V

76∝V

Unipolar

1

1

0 – 2.5V

38∝V

Prometheus CPU User Manual V1.44

Page 47

Page 46 Page 48
Page 47
Image 47
Diamond Systems PR-Z32-E-ST Analog Input Ranges and Resolution, Overview, Input Range Selection, Input Range Table
Page 46 Page 48

PR-Z32-E-ST, PR-Z32-EA-ST specifications

The Diamond Systems PR-Z32-EA-ST and PR-Z32-E-ST are pioneering solutions in the realm of embedded computing systems, designed to meet the challenging demands of various industrial applications. These boards harness advanced technologies and a comprehensive feature set to ensure exceptional performance, flexibility, and reliability.

At the heart of the PR-Z32 series is a robust processor architecture that combines efficiency with processing power. The systems are built around the Zynq-7000 SoC (System on Chip), which integrates a dual-core ARM Cortex-A9 processor with Xilinx FPGA technology. This hybrid architecture provides the ability to run complex algorithms and custom logic concurrently, making the boards ideal for applications requiring intense computational tasks such as image processing, data acquisition, and real-time control.

One of the main features of the PR-Z32-EA-ST and PR-Z32-E-ST is their versatility. Both variants support a wide range of I/O options, including USB, Ethernet, CAN, and serial interfaces. This range of connectivity allows for integrations with various sensors, actuators, and other peripheral devices, making it suitable for industrial automation, robotics, and IoT projects. The inclusion of multiple GPIO pins also enhances the capability of the boards to interface with additional hardware.

In terms of performance, the PR-Z32 series supports substantial amounts of on-board memory, which can be essential for applications requiring the storage and processing of large datasets. The configurations are often customizable, allowing users to select the appropriate amount of RAM and on-board flash memory for their specific applications.

Reliability is a critical characteristic of the Diamond Systems PR-Z32 series. The boards are built to withstand adverse environmental conditions, making them suitable for deployment in industrial environments. They are often designed to operate over a wide temperature range, ensuring functionality in both hot and cold climates. Additionally, the boards are compliant with various industry standards, assuring users of their robustness and durability.

Moreover, the PR-Z32-EA-ST and PR-Z32-E-ST support real-time operating systems (RTOS) and conventional operating systems such as Linux. This support provides developers with the flexibility to choose the best environment for their applications, whether they require real-time performance or full-fledged operating system features.

In conclusion, the Diamond Systems PR-Z32-EA-ST and PR-Z32-E-ST are formidable options for those seeking powerful, versatile, and reliable embedded computing solutions. With their advanced SoC architecture, flexible I/O options, extensive memory configurations, and environmental resilience, these boards are well-equipped to tackle the challenges of modern industrial applications.