The 8811-IO-DC is a high-density DC input/output module, engineered to serve as the interface between field devices and control systems in industrial automation setups. It is part of a family of I/O modules designed to integrate seamlessly with programmable logic controllers (PLCs), distributed control systems (DCS), and industrial PCs (IPCs).
Model 8811-IO-DC
Brand Emerson
Type DC Input/Output Module
Power Supply
24V DC (isolated)
Operating Temperature -25°C to +70°C
Mounting DIN rail (35mm)
Dimensions 120mm x 80mm x 60mm (W x H x D)
Weight 450 grams
Input Channels 32 digital inputs (24V DC, sinking/sourcing)
Output Channels 32 digital outputs (24V DC, 0.5A per channel)
Communication Profibus DP, Modbus RTU
Certifications UL, CE, CSA, ATEX
Isolation Channel-to-channel isolation (2.5kV)
Environmental Rating IP20 (when mounted in enclosure)
The 8811-IO-DC is a high-density DC input/output module, engineered to serve as the interface between field devices and control systems in industrial automation setups. It is part of a family of I/O modules designed to integrate seamlessly with programmable logic controllers (PLCs), distributed control systems (DCS), and industrial PCs (IPCs).
8811-IO-DC
This module acts as a translator and traffic manager for DC signals, converting raw sensor data into a format the control system can process and relaying control commands from the system to actuators. What makes the 8811-IO-DC valuable for engineers and integrators is its ability to handle a high number of I/O points in a compact form factor, reducing the footprint in control cabinets. It fits into system architectures by expanding the I/O capacity of the main controller, allowing it to communicate with more field devices without compromising response time. Its compatibility with standard industrial communication protocols ensures it works smoothly with existing control infrastructure.
8811-IO-DC
Main features and advantages:
The 8811-IO-DC boasts several key strengths that make it a standout in industrial I/O modules. Its high channel density—with 32 digital input points and 32 digital output points—means it can replace multiple smaller modules, simplifying wiring and reducing potential points of failure. This density is paired with impressive response times: input signals are processed in under 1 millisecond, and output signals are transmitted with equally low latency, critical for time-sensitive applications like high-speed packaging lines where even a tiny delay can cause jams.
In terms of hardware design, the 8811-IO-DC is built to withstand the rigors of industrial life. Its rugged enclosure features a conformal coating that resists moisture, dust, and chemical splashes, making it suitable for use in washdown areas or humid environments like food processing plants. The module incorporates advanced surge protection, withstanding voltage spikes up to 6 kV on input lines—vital in facilities with heavy machinery that can generate electrical noise. It also offers built-in diagnostics, with LED indicators for each channel that show signal status, making it easy to troubleshoot wiring or device issues without specialized tools.
8811-IO-DC
Technical specifications:
Model 8811-IO-DC
Brand Emerson
Type DC Input/Output Module
Power Supply
24V DC (isolated)
Operating Temperature -25°C to +70°C
Mounting DIN rail (35mm)
Dimensions 120mm x 80mm x 60mm (W x H x D)
Weight 450 grams
Input Channels 32 digital inputs (24V DC, sinking/sourcing)
Output Channels 32 digital outputs (24V DC, 0.5A per channel)
Communication Profibus DP, Modbus RTU
Certifications UL, CE, CSA, ATEX
Isolation Channel-to-channel isolation (2.5kV)
Environmental Rating IP20 (when mounted in enclosure)
Contact Us Phone:+86 16626708626 WeChat/WhatsApp:+86 16626708626 Email: 3772179818@qq.com
Application areas:
In the intricate web of industrial automation, where every machine and process relies on seamless communication between sensors, controllers, and actuators, the 8811-IO-DC stands as a critical link. Consider a large automotive assembly plant, where robotic arms weld, paint, and assemble components with pinpoint precision. Here, hundreds of digital sensors monitor part positions, pressure levels, and motor statuses, while actuators adjust conveyor speeds and clamp pressures. The 8811-IO-DC is the unsung hero in this environment, translating the DC signals from these sensors into actionable data for the central controller and sending command signals back to the actuators—ensuring every step of the assembly process stays synchronized.
In water treatment facilities, where chemical dosing pumps, valve actuators, and flow meters operate in harsh, moisture-rich environments, the8811-IO-DC proves its reliability. It handles the DC input signals from level sensors in filtration tanks and sends DC output signals to control the opening and closing of valves, ensuring that water treatment processes stay within strict quality parameters. Used in industrial automation across manufacturing, water treatment, and packaging sectors, this module addresses the challenges of converting and transmitting low-voltage DC signals in environments where electrical noise and mechanical stress are constant threats.
Related products:
8811-IO-AC – Similar to the 8811-IO-DC, but designed for AC input/output signals, ideal for high-voltage field devices.
8812-IO-DC – A lower-channel variant of the 8811-IO-DC with 16 inputs and 16 outputs, suited for smaller systems.
8811-IO-DC-HD – A heavy-duty version of the 8811-IO-DC with higher output current (2A per channel) for powering larger actuators.
8701-PLC-BASE – A PLC base unit that integrates seamlessly with the 8811-IO-DC to expand I/O capacity.
8902-TB-32 – A terminal block accessory that simplifies wiring connections to the 8811-IO-DC’s 64 channels.
8501-PS-DC – A redundant 24V DC power supply optimized to power the 8811-IO-DC and connected field devices.
8403-CAB-IO – A shielded cable harness designed to reduce electrical noise in connections to the 8811-IO-DC.
Installation and maintenance:
Before installing the 8811-IO-DC, ensure the control cabinet provides a stable environment with ambient temperatures between -25°C and +70°C—avoid mounting near heat sources like motor drives. Verify that the 24V DC power supply can deliver at least 5A to accommodate the module and its connected devices, with proper overcurrent protection. Use twisted-pair, shielded cables for all I/O connections, and terminate the shield at both ends to minimize electrical noise that could corrupt signals. Allow 20mm of clearance above and below the module to facilitate airflow, as heat buildup can degrade performance over time.
For maintenance, perform visual inspections every six months to check for loose terminal screws or signs of corrosion, especially in high-humidity environments. Use the module’s diagnostic LEDs to quickly identify faulty channels—steady red indicators on input channels may signal a broken sensor wire, while flickering outputs could indicate an overloaded actuator. Calibrate the module annually using a signal generator to ensure input thresholds remain accurate, and update firmware during scheduled shutdowns to access performance improvements. Avoid hot-swapping the 8811-IO-DC while the system is running, as this can cause transient voltage spikes that damage the module or connected devices.
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Email: 3772179818@qq.com
Phone: +86 16626708626
