Description

Product Overview

The SCHNEIDER 140ACO02000 is a Modicon Quantum 4-channel analog output module delivering 4–20 mA bipolar current signals with 12-bit resolution for continuous process control. It plugs directly into the Quantum backplane and converts digital values from the PLC CPU into analog current signals to drive field devices such as control valves, variable drives and positioners. This hardware solves inconsistent analog control and signal inaccuracy issues in legacy process plants, delivering stable closed-loop regulation for pressure, flow and temperature loops. Automation engineers and maintenance teams rely on this module to sustain existing Schneider Quantum control racks, supporting precise actuator modulation while including open-circuit detection for fast fault diagnosis. Channel-to-channel isolation reduces cross-talk and electrical noise interference, protecting control signals in cabinets with high-power motor and switching hardware. Word count overview:174

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Technical Specifications

• Product Model: 140ACO02000
• Brand: Schneider
• Warranty: One Year
• Input Voltage: Powered via Quantum backplane; external loop power 12–30 V DC
• Operating Temperature: 0 °C to 60 °C
• Storage Temperature: -40 °C to 85 °C
• Response Time: 3 ms module update time
• Protection Class: IP20 (cabinet mounting)
• Accuracy Class: ±0.20 % full scale at 25 °C
• Output Frequency: Not applicable
• Rated Current Range: 4–20 mA bipolar analog output
• Communication Interface: Modicon Quantum internal backplane bus
• Supported Protocols: Quantum backplane parallel bus
• Overload Capacity: Channel overcurrent protection, open circuit detection
• Dimensions: Single slot for Modicon Quantum rack
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Application Scenarios

• Chemical Process Flow Control: This analog output module modulates control valve positioners to regulate liquid flow inside continuous process loops. The 4–20 mA signal carries setpoint commands from the Quantum CPU, and open-circuit alarms alert operators to broken wiring or failed valve actuators before process deviation occurs.
• Boiler Pressure Regulation: The 140ACO02000 outputs analog signals to fuel gas and air dampers for boiler combustion control. Isolated channels prevent noise from nearby fan starters from corrupting control signals, maintaining stable pressure setpoints across load changes.
• Water Treatment Dosing Control: Installed in water plant control racks, the module drives chemical metering pumps. Fine 12-bit resolution delivers precise adjustment of chemical feed rates, helping maintain water quality and reduce reagent waste during continuous treatment cycles.

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Key Product Notes

This single-slot analog output module is designed exclusively for Schneider Modicon Quantum PLC racks, supporting four independent 4–20 mA current outputs. It provides channel isolation and diagnostic feedback to the CPU, reporting open-loop faults for simplified troubleshooting. The unit is end-of-life, so spare inventory is used to maintain legacy automation systems. Proper loop wiring and external 12–30 V DC supply are required for each analog output channel to function within rated accuracy.