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FM801

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The Hollysys FM801 Main Controller Module is the core of MACS system field control stations, enabling I/O data acquisition, processing, and secure Ethernet-based communication with servers.
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Technical specifications for FM801

  • Manufacturer:
    Hollysys
  • Part Number:
    FM801
  • Product Family:
    Hollysys
  • Power Supply:
    24 V DC (±10%)
  • I/O Channels:
    Configurable (e.g., 16 inputs + 16 outputs or higher)
  • Communication Interfaces:
    RS‑485, Modbus RTU, Ethernet (typical industrial protocols)
  • Operating Temperature:
    −20 °C to +60 °C
  • Storage Temperature:
    −40 °C to +85 °C
  • Enclosure Protection:
    IP20 (standard industrial grade)
  • Estimated shipping dimensions:
    15x10x3.5cm
  • Tariff Code:
    8537101190
  • Country of origin:
    China
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.
Description
The Hollysys FM801 is a high-performance main controller module designed for the MACS automation system, forming the central unit of field control stations. It works in conjunction with dedicated cages, such as the FM300, to collect and process data from I/O modules and execute configuration commands received from the MACS system server.

Through its redundant Ethernet interfaces, the FM801 ensures that all field control station data is reliably uploaded to the MACS server, while operator and engineer station instructions are delivered seamlessly via Ethernet. This enables real-time control, monitoring, and efficient data exchange within complex automation systems.

The module is engineered for industrial environments, with a 24 V DC (±10%) power supply, configurable I/O channels (e.g., 16 inputs + 16 outputs or higher), and support for RS‑485, Modbus RTU, and Ethernet communications. It operates reliably in temperatures from −20 °C to +60 °C, can be stored between −40 °C and +85 °C, and features an IP20 enclosure for standard industrial protection.

Designed for seamless integration into MACS-controlled sites, the Hollysys FM801 Main Controller Module provides robust, high-speed data handling, real-time control, and secure network communication, making it a reliable choice for industrial automation applications.
Alternative Names
FMB01 FM8O1 FM80I FM802 FM803 FM801A
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What is the power supply for the FM801?
24 V DC (±10%).
What communication interfaces are available?
RS‑485, Modbus RTU, and Ethernet.
Where is the Hollysys FM801 manufactured?
It is designed and produced in China.
What is the role of FM801 in the MACS system?
It serves as the core controller of field control stations, collecting I/O module data, performing computations, and exchanging data with the MACS server.