Schneider Electric Modicon TM221C24R Controller – 24V DC

Schneider Electric Modicon TM221C24R – Compact Controller with Integrated Analog I/O

Core Technical Specifications

• Manufacturer: Schneider Electric · Series: Modicon · Model: TM221C24R
• Power Supply: 24V DC — industrial standard voltage with wide availability
• Digital Inputs: 14 points — sink/source configurable for sensors and switches
• Digital Outputs: 10 relay type — 2A per contact, suitable for inductive loads
• Analog Inputs: 2 channels — 0-10V DC, 10-bit resolution
• Processor: 32-bit — high-speed logic execution at 22 ns per instruction
• Program Memory: 256 kB — ample space for complex automation routines
• Retention Memory: 64 kB — battery-free data preservation
• Real-Time Clock: Built-in — timestamping and scheduled task execution
• Expansion Capability: Supports Modicon TM3 I/O modules — scalable I/O count
• Physical Weight: 1.00 lbs (0.45 kg) — lightweight and panel-friendly

Environmental Ratings & Mechanical Dimensions

• Operating Temperature: -10°C to 55°C — reliable in unconditioned enclosures
• Storage Temperature: -40°C to 70°C — withstands transport extremes
• Humidity Tolerance: 10% to 95% non-condensing — stable in humid environments
• Electrical Immunity: Meets IEC 61000-4-2, -3, -4, -6 — robust against ESD and transients
• Mounting Type: DIN rail mount — 35 mm symmetrical rail compatible
• Dimensions: 130 mm length × 95 mm width × 70 mm depth — compact footprint
• Enclosure Rating: IP20 — protected against solid objects larger than 12 mm
• Package Contents: TM221C24R controller, detachable screw terminal blocks, quick start guide, mounting clip

I/O Characteristics & Expansion Flexibility

• Digital Input Type: Sink/source selectable — 24V DC, 5 ms typical filter time
• Relay Output Rating: 2 A per contact at 24V DC or 240V AC — resistive load
• Analog Input Range: 0-10V DC — 10-bit resolution, 8 ms conversion time per channel
• Expansion Bus: Right-side expansion port — accepts up to 7 TM3 I/O modules
• Communication Options: Built-in serial line — supports Modbus RTU master/slave
• High-Speed Counters: 4 built-in — 20 kHz maximum frequency
• Pulse Outputs: 2 channels — 1 kHz for stepper or simple motion control

Frequently Asked Questions – Modicon TM221C24R

• What software programs the Modicon TM221C24R?
  Schneider Electric's EcoStruxure Machine Expert - Basic software fully supports this controller. The interface uses ladder logic and FBD editors.
• Can this controller expand beyond the built-in I/O?
  Yes. The TM221C24R features an expansion port on the right side. It accepts up to 7 Modicon TM3 expansion modules for digital, analog, and temperature I/O.
• Does the TM221C24R support Ethernet communication?
  The base model does not include Ethernet. Use the TM221CE24R variant for built-in Ethernet. Alternatively, add a serial-to-Ethernet gateway.
• How long does retention memory hold data without power?
  Retention memory retains data for approximately 20 days at 25°C. The controller uses supercapacitor backup, not battery.
• What is the maximum current per common terminal?
  Each relay output common supports up to 8 A total across all outputs in that group. Distribute higher loads accordingly.
• Can the analog inputs accept 4-20 mA signals?
  Native support is 0-10V only. Use an external 250Ω precision resistor to convert 4-20 mA to 1-5V DC signal.
• Is this model suitable for HVAC applications?
  Yes. The operating temperature range and analog input capability make it ideal for building automation, pump control, and air handling units.

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