200 Series Economical PLC

Cost-effective PLC controller designed for basic automation and machine control. Ideal for OEM projects, small machines, and replacement of legacy controllers where stable performance and low cost are required.

  • Compact design for space-limited control cabinets
  • Digital I/O integrated on CPU
  • RS485 communication for HMI and field devices
  • Excellent price–performance ratio
Recommended For
  • OEM standard machines
  • Basic motion & sequence control
  • Cost-sensitive automation projects
  • Educational & training systems

Key Features

Economical Design
Optimized hardware for essential control tasks with competitive pricing.
Compact Size
Saves cabinet space and simplifies wiring in small control panels.
Integrated I/O
Digital inputs and outputs integrated on CPU, no extra modules required.
Industrial Reliability
Stable operation for long-term industrial environments.

Communication & Functions

  • RS485 interface for Modbus RTU or free protocol communication
  • Supports connection with basic HMI panels
  • Built-in timers, counters, and basic logic instructions
  • Non-volatile memory to retain program after power loss

Model Selection (200 Series Economical PLC)

Compare I/O, analog capability, RS485 ports and Ethernet options. All models use 24VDC power supply. Click model name to view product details.

Model DI DO AI AO RS485 Ethernet Power
GPU221-R-ETH / GPU221-T-ETH
With Ethernet
 6 4 relay / transistor 2 1 1 1 port 24VDC
MPU222-R / MPU222-T 8 6 relay / transistor 2 1 1 None 24VDC
GPU223-R 10 10 relay 2 2 (current only) 2 None 24VDC
GPU224XP-R / GPU224XP-T 14 10 relay / transistor 2 1 2 None 24VDC
GPU224XP-R-ETH / GPU224XP-T-ETH
With Ethernet
 14 10 relay / transistor 2 1 2 1 port 24VDC
GPU226-R / GPU226-T 24 16 relay / transistor None None 2 None 24VDC
GPU226-R-ETH / GPU226-T-ETH
With Ethernet
 24 16 relay / transistor None None 2 1 port 24VDC
GPU228-R / GPU228-T 16 14 relay / transistor 4 2 3 None 24VDC
Legend: DI = Digital Inputs, DO = Digital Outputs, AI = Analog Inputs, AO = Analog Outputs. “-R” = Relay output, “-T” = Transistor output, “-ETH” = Built-in Ethernet.
Note: GPU223-R analog outputs are current only.

Quick Selection Guide

Need Ethernet?

Choose models with built-in Ethernet for HMI/SCADA or Modbus TCP.

GPU221-ETH, GPU224XP-ETH, GPU226-ETH

Need Analog I/O?

Built-in AI/AO for sensors and basic analog control.

GPU221, MPU222, GPU223, GPU224XP, GPU228

More Digital I/O?

Higher DI/DO count for machines with many sensors and actuators.

GPU226 (24DI / 16DO), GPU228 (16DI / 14DO)

Lowest Cost Entry

Compact and economical for basic automation.

GPU221, MPU222

Typical Applications

Economical vs Standard PLC

Item 200 Series Economical S7-200 Series Standard
Target MarketCost-sensitive OEMGeneral industrial automation
Integrated Analog I/OLimited / model dependentMore options
Expansion CapabilityBasicUp to multiple modules
EthernetSelected modelsOptional / broader support
Typical UseSmall machinesMedium automation systems

Need more expansion or advanced communication? View S7-200 Series Standard PLC →

Need More Functions?

If your project requires analog I/O, temperature measurement, or advanced communication, we recommend upgrading to the S7-200 Series Standard PLC.

View Standard Series

FAQ

Q: Do all economical PLCs support Ethernet?

No. Only models with “-ETH” suffix (such as GPU221-ETH, GPU224XP-ETH, GPU226-ETH) have built-in Ethernet.

Q: Can I connect an HMI?

Yes. All models support RS485. Ethernet models support network-based HMI and Modbus TCP.

Q: Which model should I choose for analog control?

For basic analog control, choose GPU224XP or GPU228. For current-output-only applications, GPU223-R is suitable.

Q: Power supply requirement?

All 200 Series Economical PLCs use 24VDC power supply.

Technical Support & OEM Service

We provide model selection, wiring guidance, and OEM customization for economical PLC projects.

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