TM221M16R Modicon M221 PLC – 16 I/O Relay Controller

TM221M16R – Modicon M221 16 I/O Relay Logic Controller

16 discrete I/O · 8 relay outputs · 24 V DC · compact PLC for machine control

Product Overview

TM221M16R belongs to the Modicon M221 series – a compact logic controller with 8 discrete inputs, 2 analogue inputs (0…10 V), and 8 relay outputs (5…250 V AC / 5…125 V DC).
Rated supply 24 V DC, power draw 22.5 W (with max expansion). 256 kB memory, real‑time clock, and PID regulation.
CE, cULus, DNV‑GL, ABS, LR certified. Ideal for small automation tasks, conveyor control, and packaging machinery.

Technical Data – Key Parameters

• Brand: Schneider Electric (Modicon)
• Model: TM221M16R – M221 CPU, relay outputs
• Discrete I/O: 16 total (8 inputs + 8 relay outputs)
• Analogue inputs: 2 channels, 0…10 V, 10‑bit resolution
• Supply voltage: 24 V DC (limits 20.4…28.8 V)
• Response time (fast input): 5 µs (turn‑on) / 35 µs (turn‑off)
• Output voltage range: 5…250 V AC / 5…125 V DC
• Output current: 2 A per output, 7 A common
• Memory: 256 kB RAM + 256 kB flash backup
• Max expansion: 7 local / 14 remote I/O modules
• Communication: USB, RS485, RS232 (Modbus RTU/ASCII)
• Operating temp: –10…55 °C (horizontal), IP20
• Vibration / shock: 3.5 mm (5…8.4 Hz) · 98 m/s² (11 ms)
• Certifications: CE, cULus, DNV‑GL, ABS, LR, EAC, UKCA

Diagnostics & Environmental Immunity

• Built‑in diagnostics: LED status for PWR, RUN, ERR, SD, BAT, SL1/SL2, and I/O channels.
• EMC immunity: 8 kV ESD (air), 10 V/m RF field, 2 kV fast transients, 2 kV surge (common mode).
• Environmental: 10…95 % RH non‑condensing, altitude 0…2000 m, pollution degree ≤2.
• Shock & vibration: Meets maritime standards (DNV, ABS, LR) – suitable for harsh conditions.
• Microbreak immunity: 10 ms power interruption tolerance.

Typical Applications – Where to Use

• Packaging lines: conveyor indexing, filling, capping.
• Material handling: sorting gates, small elevators, turntables.
• HVAC & building: fan control, damper actuators, pump sequencing.
• Special machinery: printing, textile, woodworking equipment.
• Compatible with Modicon M221 expansion modules (up to 7 local / 14 remote).

Installation, Setup & Maintenance

• Mounting: DIN rail (TH35‑15/7.5) or panel mount (kit included).
• Wiring: Removable screw terminals – fast connection.
• Programming: EcoStruxure Machine Expert – Basic (free) via USB mini‑B.
• Debugging: Online monitoring, real‑time PID tuning, and forced I/O.
• Maintenance: No routine calibration; battery (BR2032) backup for 1 year.

Oiltech Controls’s Insight – Expert Selection

• TM221M16R suits small‑to‑medium relay‑based logic. Ideal for retrofitting older relay panels.
• Relay outputs handle AC/DC loads – perfect for motor starters, solenoids, and indicator lamps.
• Fast inputs (5 µs) support high‑speed counting (up to 100 kHz) – use for encoders or flow meters.
• On‑board analogue inputs eliminate external signal conditioners for 0…10 V sensors.
• For remote I/O, the M221 supports up to 14 modules – scalable for growing systems.

Packing, Shipping & Warranty

• Package: 1 x TM221M16R controller, terminal blocks, quick‑start guide.
• Dimensions: 12.8 x 10.8 x 10.0 cm · Weight: 440 g.
• Shipping: FedEx, UPS, DHL – global express (24‑28 h dispatch).
• Warranty: 12‑month against manufacturing defects.

Professional FAQ – Selection & Experience

• Q: Can I replace a failed relay output with a solid‑state alternative?
  A: The M221 uses electromechanical relays. For high‑frequency switching, consider the M221 with transistor outputs (TM221M16T). Our team can advise on retrofit options.
• Q: What is the maximum cable length for analogue inputs?
  A: Keep unshielded cables < 1 m for 0…10 V signals to avoid noise. Use shielded twisted‑pair for longer runs (up to 10 m with proper grounding).
• Q: Can this controller run a small servo or stepper?
  A: Not directly – it has no built‑in motion. Use the fast inputs for encoder feedback and pair with an external drive (via relay outputs). For integrated motion, see Modicon M262.
• Q: How do I choose between M221 and M241?
  A: M221 is cost‑effective for simple relay logic and small I/O. M241 adds Ethernet, CANopen, and more motion capabilities. Choose M221 for standalone machines under 40 I/O.
• Q: Does the battery maintain the real‑time clock during power loss?
  A: Yes – BR2032 provides 1 year backup (at 25 °C). We recommend replacing the battery every 2 years during preventive maintenance.

Why Oiltech Controls – Your Automation Partner

• 15+ years in industrial spares – deep technical know‑how.
• Worldwide shipping – reliable, fast, and insured.
• Tested surplus / refurbished – fully functional, cost‑effective.
• 12‑month warranty with pre‑shipment verification.
• Obsolescence support – we help legacy systems stay alive.

Contact our engineers:
info@oiltechcontrols.com
·
+86 158 8020 0923 (WhatsApp)

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