Chapter 3: Gain Selection

The FBDA has several different gain settings to provide the largest possible voltage range for an A/D converter. The gain of the FBDA is selected using a jumper, 6 jumper pins (labeled 1-6), and a potentiometer (labeled P1). The FBDA is calibrated at the factory to have a gain of 80 ± 2. To change the gain of the FBDA the following steps should be followed:

1.Remove the cover from the FBDA using a small slotted screwdriver.

2.There are six jumper pins labeled 1-6. Place the jumper on the two pins selected from Table 3.1 below. Placing the jumper on the two selected pins will set a gain near the values listed in Table 3.1.

3.Make all of the required connections (power supply, A/D converter, sensor, and excitation voltage), and turn on the power.

4.Set up your sensor to provide a known input signal for the FBDA. If you are using a load cell, place a known weight on the load cell. This will produce a known input signal.

5.The output voltage from the FBDA can be read from DB-25 pin 8 (A/D 0 on B&B Electronics’ SDAXX data acquisition modules).

6.Adjust P1 to trim the gain to an exact value. The gain equation is shown below. ((SIG+) - (SIG-)) is the input signal.

Table 3.1: Jumper Selection to Choose Gain

Gain

Jumper Selection

25

Jumper pin 5 to pin 6

40

Jumper pin 4 to pin 5

80

Jumper pin 2 to pin 3

220-1000

Jumper pin 1 to pin 2

1.The potentiometer (P1) becomes more critical as the gain is increased.

2.The gain range of 220 to 1000 is entirely decided by P1. When P1 is turned completely in counter-clock-wise, the Gain will be close to 220. When P1 is turned completely clock-wise, the Gain will be greater than 1000.

Documentation Number FBDA0797 Manual

7

B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350

PH (815) 433-5100 -- FAX (815) 433-5105

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B&B Electronics FBDA manual Gain Selection, Gain Jumper Selection
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FBDA specifications

B&B Electronics’ FBDA series stands as a testament to innovation in the realm of data communication and networking solutions. These robust devices are designed to facilitate seamless data transmission, making them an essential component for various industrial applications. Thanks to their advanced features and technologies, the FBDA devices are suitable for demanding environments where reliability and performance are critical.

One of the standout characteristics of the FBDA series is its support for multiple communication protocols. This versatility ensures that users can integrate the devices into diverse systems without facing compatibility issues. The FBDA supports protocols such as RS-232, RS-422, and RS-485, making it an ideal choice for various applications, from serial communications in a factory setting to remote data acquisition in agricultural or environmental monitoring systems.

The FBDA incorporates advanced signal processing technologies that enhance data integrity over long distances. With features like advanced error-checking mechanisms and robust anti-jamming capabilities, the FBDA ensures that data remains accurate and reliable, even in electrically noisy environments. This capability is particularly valuable in industrial settings where electromagnetic interference can often disrupt signals.

Another distinguishing feature of the FBDA series is its compact and sturdy design, which allows for easy integration into existing systems without requiring extensive modifications. The rugged build quality ensures durability, making the devices suitable for harsh conditions, including extreme temperatures and vibrations commonly found in industrial installations.

Moreover, the FBDA series is equipped with user-friendly interfaces that facilitate easy configuration and monitoring. Many models come with features like LED indicators to provide real-time feedback on the operational status, allowing for quick troubleshooting and maintenance. Additionally, the devices often have intuitive software options that make setup and adjustment straightforward, enabling users to maximize functionality with minimal effort.

Power efficiency is another key characteristic of the FBDA series. Designed to operate at low power consumption levels, these devices help minimize energy costs while maintaining high performance. This feature is particularly beneficial for applications in remote locations where power availability may be limited.

In conclusion, B&B Electronics’ FBDA devices exemplify cutting-edge technology in data communication, combining multiple protocol support, robust signal processing, durable design, user-friendly interfaces, and energy efficiency. Their versatility and reliability make them an invaluable asset for any industrial or commercial application needing efficient data communication solutions.
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