PLCs, Power Supplies & Others

The Schneider 140ACO02000 provides precision analog current output for Modicon Quantum automation systems. This analog output module delivers four isolated 4-20mA channels with 12-bit resolution for industrial process control applications.

Key Technical Specifications

Precision Current Output Architecture

The Schneider 140ACO02000 features four independent analog output channels, each generating a 4-20 mA current signal. This module requires an external 12-30 VDC loop power supply for each output circuit, allowing flexible integration with various field devices.

Each channel delivers 12-bit resolution, providing 4096 discrete steps across the full current range. This resolution ensures smooth valve positioning, precise speed control, and accurate setpoint transmission.

Channel Isolation and Noise Immunity

This analog output module provides 500 VAC isolation between individual channels and the backplane. This isolation prevents ground loops from affecting multiple control loops simultaneously, a common issue in large distributed installations.

Engineers can confidently connect the 140ACO02000 to field devices sharing different power sources. The isolation barrier protects the Quantum backplane from voltage transients originating in field wiring.

Mechanical Design and Form Factor

Weighing approximately 0.35 kg, this analog output module occupies a single slot in Modicon Quantum racks. Its compact dimensions of 130 mm x 40 mm x 100 mm enable high-density I/O configurations within control cabinets.

The module faceplate includes four green LED indicators, one per output channel. Each LED illuminates when its corresponding channel actively drives current, providing immediate operational status at a glance.

System Integration with Modicon Quantum

Schneider designed the 140ACO02000 exclusively for the Modicon Quantum automation platform. The module connects directly to the Quantum backplane through the standard 96-pin connector, requiring no special cabling or adapters.

The module communicates with Quantum CPUs including 140CPU31110, 140CPU43412, and 140CPU65150 models. Unity Pro and Concept software provide complete configuration access for output ranging and failure mode presets.

Output Characteristics and Load Driving

Each of the four 4-20 mA outputs drives loads up to 600 Ω maximum with a 24 VDC loop supply. This capability accommodates most analog instruments, valve positioners, and variable frequency drive speed reference inputs.

The module automatically indicates open-loop conditions through system diagnostics. Users can configure fail-safe states for each channel independently during software configuration.

External Loop Power Requirements

The 140ACO02000 requires an external 12-30 VDC power source for each output channel. Unlike self-powered modules, this design allows individual loop power selection based on specific field device requirements.

Typical installations use a common 24 VDC supply for all four channels. However, engineers can power each channel from separate supplies when interfacing with devices having different voltage requirements.

Application Versatility

Process industries deploy the Schneider 140ACO02000 across numerous continuous control applications. Common implementations include proportional valve positioning, variable frequency drive speed command, chart recorder driving, and remote setpoint transmission.

The 4-20 mA current loop standard ensures compatibility with thousands of industrial instruments. Field devices accept this signal for pressure control, flow regulation, temperature maintenance, and level management.

LED Status Indication

Four front-panel LED indicators provide immediate channel status feedback. A steady green light confirms active analog output, while an unlit LED signals configuration absence or hardware fault.

This visual indication proves invaluable during commissioning and troubleshooting. Technicians can verify output operation without connecting diagnostic tools or accessing software.

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