The most convenient way to use solid state relays and a PCI-DIO96 board is to use a Solid State Relay Rack. An SSR Rack is a circuit board with input buffer amplifiers that are powerful enough to switch the SSRs. The buffer amplifiers and SSRs are socketed.

The standard buffer amplifiers are inverting types, meaning that a low input from a DIO 82C55 outputs a high to the SSR which turns it on (“closes” the SSR output). If desired, non-inverting amplifiers can be specified.

7.3 VOLTAGE DIVIDERS

If you wish to measure a signal that varies over a range greater than the input range of a digital input, use a voltage divider to drop the voltage of the input signal to the level the digital input can measure.

Ohm's law states:

Voltage = Current * Resistance

Thus, any variation in the voltage drop for the circuit as a whole will have a proportional variation in all the voltage drops in the circuit.

In a voltage divider, the voltage across one of the resistors in a circuit is proportional to the voltage across the total resistance in the circuit (Figure 7-2).

When designing a voltage divider, choose two resistors with the proper proportions relative to the

Signal

High

R1

Signal

Volts Vin

R2

Signal

Low

V1

Board

Input

V2

Vout

Ground

full scale of the digital input and the maximum signal voltage.

The formula for voltage attenuation is:

SIMPLE VOLTAGE DIVIDER - Vin = R1+R2

Vout R2

Figure 7-2. Voltage Divider

 

The variable Attenuation is the

Attenuation = R1+R2

proportional difference between the

R2

signal voltage max and the full scale of

 

the analog input.

 

For example, if the signal varies

2 = 10K+10K

between 0 and 10 volts, and you wish to

10K

measure that with a PCI-DIO96 board

22

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Omega Engineering PCI-DIO96 user manual Voltage Dividers
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PCI-DIO96 specifications

The Omega Engineering PCI-DIO96 is a versatile and high-performance digital input/output board designed for a wide range of industrial automation and data acquisition applications. With its robust features and advanced technologies, the PCI-DIO96 stands out in the field of digital I/O expansion cards.

At the core of the PCI-DIO96 is its capability to handle 96 digital I/O channels, making it suitable for applications that require extensive control and monitoring. The board is equipped with 96 lines that can be individually configured as input or output, providing flexibility to manage various digital devices such as sensors, valves, and relays. This configuration is particularly beneficial in complex systems where a mix of digital signals is needed.

One of the most notable characteristics of the PCI-DIO96 is its high-speed operation. The board supports data transfer rates that can accommodate demanding applications, enabling rapid response times crucial in industrial environments. This high-speed capability ensures that it can keep up with the fast-paced demands of modern automation processes.

The PCI-DIO96 also includes additional features such as programmable timers and counters, allowing for precise control and measurement of time-sensitive processes. This performance enhancement is especially useful in applications requiring synchronization of multiple digital signals or sequential operations.

Another significant advantage of the PCI-DIO96 is its compatibility with various operating systems and widely-used programming environments. It can be seamlessly integrated with popular data acquisition and control software, providing users with a familiar setup process. This ease of integration diminishes the time required for installation and setup, allowing for quicker deployment in projects.

The hardware design of the PCI-DIO96 also emphasizes reliability and ease of use. The board is built with durable components to withstand the rigors of industrial settings, ensuring longevity and reliability in various conditions. Additionally, its straightforward installation process translates into minimal downtime during setup.

In conclusion, the Omega Engineering PCI-DIO96 is a powerful digital I/O board that combines extensive channel capacity, high-speed performance, and robust features. Its versatility makes it an ideal choice for diverse applications in industrial automation, offering reliability and ease of integration that professionals in the field seek for their projects. Whether for monitoring, control, or data acquisition, the PCI-DIO96 remains a trusted solution for engineers and technicians alike.
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