Emerson EC20-2012BRA PLC Main Module 20DI/12RO

Emerson EC20-2012BRA PLC Main Module - Compact Control Solution for Industrial Automation

The Emerson EC20-2012BRA PLC Main Module delivers reliable programmable logic control for small to medium-scale industrial automation applications. Part of the DeltaV EC20 Series, this compact controller features 20 digital inputs and 12 relay outputs in a single module, providing comprehensive discrete I/O capabilities for machine control, process automation, and building management systems across manufacturing, oil & gas, water treatment, and HVAC industries.

Core Technical Specifications

• Model Number: EC20-2012BRA
• Series: DeltaV EC20 Programmable Logic Controller
• Digital Inputs: 20 channels, 24VDC, sink/source configurable
• Digital Outputs: 12 relay outputs, 250VAC/30VDC, 2A per channel
• Processor: 32-bit microprocessor for fast scan times
• Program Memory: 256 KB for ladder logic programs
• Data Memory: 128 KB for variables and data storage
• Communication: 1x RS232, 1x RS485 (Modbus RTU/ASCII)
• Power Supply: 24VDC, 0.5A (excluding I/O load), ~12W consumption
• Operating Temperature: -5°C to +55°C (23°F to 131°F)

Global Safety & EMC Certifications

Certified for deployment in industrial automation environments worldwide:

• CE Marking: European conformity for electrical safety and EMC compliance
• RoHS Compliant: Restriction of Hazardous Substances directive compliance
• Protection Rating: IP20 for control cabinet installation
• Environmental: ISA-S71.04-1985 Class G3 airborne contaminants protection

Industrial Automation Applications

Machine Control & Sequencing: Control packaging machines, conveyor systems, material handling equipment, and assembly lines with the EC20-2012BRA's 20 digital inputs monitoring limit switches, proximity sensors, and safety interlocks. The 12 relay outputs drive motor starters, solenoid valves, and indicator lights, executing complex sequencing logic programmed in ladder diagram format using ControlStar software.

Process Automation: Automate batch processes, mixing operations, and material transfer systems in chemical, pharmaceutical, and food & beverage manufacturing. The relay outputs' 2A per channel rating handles standard industrial contactors and valve solenoids, while the sink/source configurable inputs interface with both PNP and NPN sensors without requiring external signal conditioning.

Building Management Systems: Control HVAC equipment, lighting systems, access control, and fire alarm interfaces in commercial buildings and industrial facilities. Modbus RTU/ASCII communication over RS485 enables integration with building automation systems (BAS), energy management platforms, and SCADA supervisory control for centralized monitoring and optimization.

Water & Wastewater Treatment: Automate pump control, valve sequencing, chemical dosing, and level management in water treatment plants, lift stations, and distribution systems. The wide operating temperature range (-5°C to +55°C) accommodates outdoor installations in pump houses and remote equipment shelters without requiring environmental conditioning.

Oil & Gas Wellhead Control: Monitor and control wellhead equipment, separator operations, and tank farm automation in upstream oil & gas production. The compact DIN rail mounting (128mm x 90mm x 82mm) fits in space-constrained field enclosures, while the rugged design withstands vibration, humidity, and temperature extremes common in oilfield environments.

Digital Input Capabilities

Versatile input configuration for diverse sensor types:

• 20 Input Channels: Monitor switches, sensors, and discrete signals from field devices
• 24VDC Nominal: Standard industrial voltage level for proximity sensors and photoelectric switches
• Sink/Source Configurable: Compatible with both PNP (source) and NPN (sink) sensor outputs
• Fast Response: Typical input response time <10ms for high-speed counting and event detection
• Electrical Isolation: Opto-isolated inputs protect PLC from field wiring faults and ground loops

Relay Output Features

High-current switching for industrial loads:

• 12 Relay Channels: Electromechanical relays provide galvanic isolation between control and load circuits
• 250VAC/30VDC Rating: Switch AC or DC loads up to 2A per channel
• Universal Load Compatibility: Drive motor starters, solenoid valves, indicator lamps, and alarm horns
• Inductive Load Handling: Relay contacts rated for inductive loads (contactors, solenoids) with appropriate derating
• Replaceable Relays: Individual relay modules can be replaced in the field for maintenance

Communication & Networking

Flexible connectivity for system integration:

RS232 Port: Connect to programming terminals, HMI panels, or local operator interfaces for configuration, monitoring, and troubleshooting. The RS232 port supports ControlStar programming software for ladder logic development, online debugging, and program uploads/downloads.

RS485 Modbus: Integrate with SCADA systems, HMI/SCADA platforms, and other Modbus-compatible devices using industry-standard Modbus RTU or Modbus ASCII protocols. The RS485 multi-drop network supports up to 32 devices on a single bus, enabling distributed control architectures with multiple EC20 PLCs and I/O expansion modules.

Expansion Capability: Connect EC20 expansion modules (EC20-8AD analog input, EC20-4DA analog output, additional discrete I/O) to increase system I/O capacity beyond the base 20DI/12RO configuration. The expansion bus supports multiple modules for applications requiring 50+ I/O points.

Programming & Configuration

User-friendly development environment:

• ControlStar Software: Windows-based programming environment with ladder logic editor, function blocks, and structured text
• Ladder Logic Programming: IEC 61131-3 compliant ladder diagram programming familiar to PLC technicians
• 256 KB Program Memory: Sufficient capacity for complex control logic with thousands of rungs
• 128 KB Data Memory: Store process variables, setpoints, timers, counters, and historical data
• Online Debugging: Monitor and force I/O points, set breakpoints, and troubleshoot logic while PLC is running

Environmental Specifications

Why Choose Industrial Control Hub?

Your specialized source for genuine Emerson automation products:

• ✓ 100% authentic OEM products with full manufacturer traceability and warranty
• ✓ Expert PLC technical support from certified automation engineers
• ✓ Extensive inventory of current production and legacy EC20 series components
• ✓ Expedited global shipping to US, UK, EU, and Asia-Pacific markets
• ✓ Competitive pricing with volume discounts for project quantities
• ✓ Complete documentation, programming software, and commissioning assistance

Complementary EC20 Series Components

Installation & System Integration

• DIN Rail Mounting: Snap-on installation to standard T-type 35mm DIN rail
• Power Supply: 24VDC industrial power supply (0.5A minimum, excluding I/O load)
• Input Wiring: Screw terminals accept 14-22 AWG wire (0.5-2.5mm²)
• Output Wiring: Relay terminals rated for 14-22 AWG wire, torque to 0.5 Nm
• Grounding: Dedicated ground terminal for chassis grounding and noise immunity

Ordering Information & System Planning

• EC20-2012BRA: PLC Main Module with 20 Digital Inputs, 12 Relay Outputs (this product)
• Programming Software: ControlStar software (download from Emerson website or contact support)
• Power Supply: 24VDC industrial power supply rated for PLC + I/O load
• Expansion Modules: EC20-8AD, EC20-4DA, and additional discrete I/O modules available
• Communication Cables: RS232 and RS485 cables for programming and networking

Technical Documentation & Support

Complete user manuals, programming guides, Modbus protocol specifications, and wiring diagrams available upon request. Our application engineering team provides ladder logic programming assistance, Modbus configuration support, system architecture consultation, and troubleshooting guidance for complex EC20 PLC applications.

Maintenance & Service Life

• MTBF: >50,000 hours at 25°C ambient temperature
• Battery Backup: Internal lithium battery maintains program and data memory during power loss (replaceable)
• Relay Life: 100,000 mechanical operations, 50,000 electrical operations at rated load
• Preventive Maintenance: Verify I/O operation quarterly, test relay contacts annually, replace battery every 5 years
• Expected Service Life: 10-15 years in typical industrial control cabinet environments

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