A&D Weighing FC-04i RS-232C/Comparator Relays

The A&D FC-04i is an optional interface designed for A&D FC-i and FC-Si Series counting scales. It adds an additional RS-232C communication port along with comparator relay outputs, allowing the scale to communicate with external equipment such as PLCs, stack lights, sorting systems, alarms, or automated production equipment. This accessory is ideal for improving efficiency in counting, packaging, and quality control applications.

Comparator relay outputs automatically signal whether a measured value is below, within, or above a preset target range. This enables external devices—such as buzzers, indicator lights, conveyors, or reject mechanisms—to respond instantly without manual intervention. The FC-04i is especially valuable for repetitive counting and check-weighing operations where speed and consistency are essential.

The FC-04i is specifically designed for the A&D FC-i and FC-Si Series counting scales. It installs as an optional interface inside compatible models to expand communication and automation capabilities. Before purchasing, verify that your scale belongs to one of these series to ensure proper compatibility.

No. The FC-04i and FC-03i cannot be used at the same time because they occupy the same internal option slot. If your application requires comparator relay outputs, the FC-04i is the appropriate choice. If you need dual RS-232C communication ports without relay outputs, the FC-03i is the better option.

The FC-04i is an excellent upgrade for businesses that want to integrate their counting scale into an automated workflow. By combining an additional RS-232C interface with relay-based comparator outputs, it simplifies communication with computers and industrial control equipment while enabling faster pass/fail decisions and reduced operator involvement. This makes it a practical solution for manufacturing, packaging, inventory control, and quality assurance environments.