ABB ci521-modtcp-xc:s500, bus-module 4ai/2ao/8di/8do

Why Choose the ABB CI521-MODTCP-XC Modbus TCP Communication Interface Module?

The ABB CI521-MODTCP-XC, part number 1SAP422100R0001, is a Modbus TCP communication interface module designed for decentralised I/O applications in ABB AC500-XC automation systems. It combines 4 analogue inputs, 2 analogue outputs, 8 digital inputs and 8 digital outputs in one compact interface module.

The CI521-MODTCP-XC operates as a Modbus TCP server and provides flexible analogue signal handling for voltage, current and RTD inputs, together with voltage and current analogue outputs. The digital channels provide 24 V DC inputs and 24 V DC transistor outputs rated up to 0.5 A, making the module suitable for a broad range of machine and process automation applications.

As an XC version, the CI521-MODTCP-XC is intended for applications with enhanced environmental requirements, including extended ambient temperature and humidity ranges. It supports expansion with up to 10 S500 I/O modules and provides galvanic isolation between the I/O module and Ethernet network for robust integration into industrial communication architectures.

Key Advantages

• Modbus TCP server for decentralised industrial I/O communication.
• Combines 4 analogue inputs, 2 analogue outputs, 8 digital inputs and 8 digital outputs.
• Supports voltage, current and RTD measurement signals.
• 24 V DC digital inputs and transistor outputs rated up to 0.5 A.
• XC design for enhanced environmental conditions.
• Expandable with up to 10 additional S500 I/O modules.
• Ethernet interface galvanically isolated from the I/O section.
• Software-configurable analogue channels for flexible system integration.

Key Features

• ABB AC500-XC / S500-XC Modbus TCP communication interface module.
• Modbus TCP server functionality.
• 4 analogue inputs supporting voltage, current and RTD signals.
• 2 analogue outputs supporting voltage and current signals.
• 8 digital inputs rated at 24 V DC.
• 8 digital outputs rated at 24 V DC and up to 0.5 A.
• Analogue inputs and outputs with 12-bit resolution including sign.
• Analogue input ranges include 0–10 V, −10 to +10 V, 0–20 mA, 4–20 mA and supported RTD ranges.
• Analogue outputs configurable for −10 to +10 V, 0–20 mA or 4–20 mA.
• Fast counter functionality.
• Module-wise galvanic isolation.
• Ethernet communication via the compatible terminal unit.
• Two Ethernet interfaces available through the terminal unit for network connection.
• Rotary switches for setting the final byte of the IP address.
• Expandable by up to 10 S500 I/O modules.

Reliable Modbus TCP Communication for Industrial Automation

The ABB CI521-MODTCP-XC provides a compact decentralised I/O solution for Modbus TCP networks. Its combination of analogue and digital channels allows controllers to monitor sensors, temperature devices and process signals while controlling connected actuators and digital equipment through a single communication interface.

The module is particularly suitable for AC500-XC architectures where field I/O needs to be distributed throughout a machine or process installation. With support for additional S500 I/O modules, galvanic isolation from the Ethernet network and XC environmental capabilities, the CI521-MODTCP-XC offers flexible expansion for demanding industrial automation systems.

Typical Applications

• Decentralised Modbus TCP I/O systems.
• AC500-XC PLC automation architectures.
• Machine and production-line automation.
• Industrial process monitoring and control.
• Temperature measurement using RTD sensors.
• Voltage and current signal acquisition.
• Analogue actuator and control signal generation.
• Digital sensor and actuator interfacing.
• Distributed S500-XC I/O installations.
• Industrial applications requiring enhanced environmental performance.