Rockwell Automation Input Cards for Load Cell Signal Reception in the 1734 and CompactLogix Series

Many are overlooking the cost aspect of using Hardy 4050's on Ethernet. While Hardy instruments are known to be on the pricier side, costing around $2,000 or more, there are more affordable options available such as the OMEGA analog load cell device which can be purchased for a fraction of the cost. It is also important to consider that the system may already have Analog Inputs available, eliminating the need for an additional module.

• 01-01-2025
• robertmee

In his comment, robertmee pointed out the importance of considering the cost factor. I have personally used the Hardy 4050's on Ethernet, but it's worth noting that Hardy instruments can be pricey, usually costing around $2,000 or more. On the other hand, you can purchase an OMEGA analog load cell device for a much lower price. The cost considerations also assume that the system will likely already have Analog Inputs available, eliminating the need for an extra module. Ultimately, the decision comes down to assessing the value of your time and considering if the OP is setting up an in-line weigh scale. Investing in Hardy Instruments gear can save you numerous hours of work, allowing you to focus on utilizing the scaled results in your operations. While there may still be a slight learning curve when it comes to utilizing the scale module features, it is significantly less time-consuming compared to developing them yourself from scratch.

• 01-01-2025
• OkiePC

OkiePC mentioned that the decision to invest in Hardy Instruments gear depends on the value of your time and the specific application, such as building an in-line weigh scale. Hardy Instruments gear can save you countless hours of work, allowing you to focus on utilizing the scaled results in your operation. While there may be some time required to learn how to use the scale module features, it is significantly less than developing them from scratch. I agree with this perspective for a full-scale in-line weigh scale. However, I interpreted the suggestion to "add a load cell to a conveyor" as more of a check weigh application. For in-line weigh scales, I personally prefer techweigh or Thayer as they are reliable products in the industry.

• 02-01-2025
• robertmee

Load cells are employed on inline conveyors to accurately measure gross weights, tare weights, and piece counting in real-time. The Hardy 4050 stands out as a top choice for such applications. Mettler also offers a high-quality ethernet/IP weigh controller. With numerous options available, there are various approaches to achieving this goal. Providing more detailed information about the application will enable us to offer more targeted suggestions for optimal results.

• 02-01-2025
• TWS

If you are looking for a quick weight measurement, LS-Analog is a straightforward option. For precise accuracy, opting for an LS-Ethernet device would be more suitable.

• 02-01-2025
• JaxGTO

Robertmee pointed out that the cost argument is being overlooked. He mentioned that the Laumas TLM-8 unit, which comes with the ModbusTCP option, is priced at $665. Interestingly, this is actually less expensive compared to the cost of a compactLogix analog input card that he bought previously.

• 02-01-2025
• strantor

A baker in Virginia recently inquired about whether Rockwell Automation offers an Input Card compatible with Loadcells, specifically in the 1734 series or CompactLogix series. The individual is interested in installing a load cell on a small conveyor. While Rockwell Automation does offer suitable options, it may be more convenient to utilize a load cell amplifier/transmitter. This device can efficiently convert the load cell's mV input into standard PLC signals such as 0-10v or 4-20mA. This alternative could provide a simpler solution for your setup.

• 02-01-2025
• aamirawan91

Helm offers a PointIO unit with the part number HM-1734-WM specifically designed for two-channel load cell operations. This unit is ideal for precise loss-in-weight feeding of components. Additionally, the HM-1734-LCP load cell power module is necessary when utilizing both channels of the device. Both units are known for their reliable performance in industrial settings.

• 02-01-2025
• drforsythe

Another alternative is to directly connect the load cell's millivolt output to a Thermocouple/Millivolt card such as the 1756-IT6I, 1734-IT2I, or 1794-IT8. It is important to ensure the load cell is powered with the correct voltage. One advantage of utilizing a Loadcell Card or Loadcell Controller is that it typically includes the necessary supply voltage to properly operate the load cell. This option simplifies the setup process and ensures accurate readings.

• 02-01-2025
• kekrahulik

When it comes to choosing a platform for load cell applications, there are many reasons why we prefer the Beckhoff platform. The issue with using load cell "controllers" or amplifier modules to convert load cell signals to analog signals for PLCs is that it leads to accuracy loss, propagation delays, increased costs, and complexity. Additionally, the signal data from the load cell amplifier may not be well synchronized with the PLC. In the Beckhoff world, the roads are smoother and more efficient compared to other platforms. For instance, with the Beckhoff platform, you can use modules like the EL3356-0010, ELM3502-0030, EPP3504-0023, and EP3356-0022 for accurate and high-speed measurements. These modules offer features like over-sampling technology and high sampling frequencies, making them ideal for applications where precision and accuracy are essential. By integrating these modules with the TwinCAT software, load cell data can be synchronized with other process data within microseconds. Say goodbye to the rocky roads and embrace the smooth journey with Beckhoff's high-quality solutions.

• 02-01-2025
• busarider29