TM3AQ2 | Schneider Electric 2-Ch Analog Output Module

Product Overview: The TM3AQ2 in Context

Industrial automation has evolved from relay logic to distributed control, and analog signal integrity now determines process quality. The Schneider Electric TM3AQ2 analog output module, part of the Modicon TM3 series, addresses this evolution with two software-configurable channels. Consequently, engineers can command 0-10 V, ±10 V, 0-20 mA, or 4-20 mA loops directly from the controller backplane.

Each channel resolves to 12 bits, and accuracy is verified at ±0.1% of full scale at 25 °C. Over the operating temperature range, accuracy holds to ±1% of full scale. The module draws 24 Vdc via the TM3 bus, so no external supply wiring is required for logic power.

TM3AQ2 Key Features and Technical Specifications

• Channels: Two analog outputs, configurable per channel in software.
• Signal ranges: 0-10 Vdc, ±10 Vdc, 0-20 mA, and 4-20 mA.
• Resolution: 12 bits for precise setpoint control.
• Accuracy: ±0.1% of full scale at 25 °C; ±1% FS over temperature.
• Isolation: 1500 V AC between output and supply; 500 V AC between output and internal logic.
• Response time: 1 ms conversion plus 1 ms per channel plus one controller cycle; 1 ms stabilization.
• Wiring: Removable screw terminal block, 5.08 mm pitch.
• Diagnostics: Module status and bus status indicators.

Among these, the dual isolation barrier is distinctive. Because the output-to-supply isolation is 1500 V AC, field wiring faults cannot propagate into the controller backplane. This protects both the module and the PLC rack.

Installation and Setup

Mount the TM3AQ2 on the TM3 bus alongside a compatible Modicon controller. Next, wire the removable screw terminal block at 5.08 mm pitch, observing the channel assignments. Then, configure each channel's range in the controller software. The module operates from 0 to +55 °C, so verify panel ventilation before commissioning. Finally, confirm the module status and bus status LEDs before enabling outputs.

Compatibility and Integration

The TM3AQ2 integrates with Modicon M221, M241, M251, and M262 platforms. Because it communicates over the TM3 bus, it extends the controller's native I/O without additional network configuration. For fieldbus-based architectures, confirm gateway requirements with your supplier.

Reliability and Maintenance

With an IP20 protection rating, the module suits clean control cabinets. Inspect terminal screws periodically for tightness, and verify accuracy against a calibrated reference during scheduled maintenance. Since the module has no moving parts, wear is minimal. However, ambient temperature above +55 °C will degrade accuracy, so maintain cabinet cooling.