Smart 200 Standard PLC

Ethernet-enabled PLC family for machine control, OEM automation, and system upgrades. Includes Standard models (SR/ST series) and Compact models (CR series).

Standard Models Compact Models Quick Select

Legend: SR = Relay output type, ST = Transistor output type (for high-speed switching).

Highlights

Built-in Ethernet (10/100 Mbps adaptive)
Multiple I/O sizes: 20 / 30 / 40 / 60 class
Optional analog I/O on XP / PRO models
Compact CPU options for space-limited cabinets

Quick Selection Guide

Basic Digital I/O

Choose SR20/ST20, SR30/ST30, SR40/ST40, SR60/ST60 for standard digital control.

Need Analog I/O

Choose XP for analog I/O, or PRO for higher analog I/O in the 20-class.

Limited Cabinet Space

Choose CR compact models (CR10XP / CR14XP / CR20 / CR30 / CR40 / CR60).

Relay vs Transistor

SR (relay) for general loads, ST (transistor) for high-speed outputs.

Standard Models (SR / ST Series)

All Standard models include 1 × 10/100 Mbps adaptive Ethernet port. Click model name to view product details.

Model	Digital I/O	Analog I/O	Ethernet	Data Memory	Dimensions (mm)
SR20 / ST20	12 DI / 8 DO (Relay / Transistor)	None	1 × 10/100 Mbps Adaptive	12 KB	90 × 100 × 81
SR20XP / ST20XP	12 DI / 8 DO (Relay / Transistor)	2 AI / 1 AO	1 × 10/100 Mbps Adaptive	12 KB	90 × 100 × 81
SR20PRO / ST20PRO	12 DI / 8 DO (Relay / Transistor)	4 AI / 2 AO	1 × 10/100 Mbps Adaptive	12 KB	110 × 100 × 81
SR30 / ST30	18 DI / 12 DO (Relay / Transistor)	None	1 × 10/100 Mbps Adaptive	16 KB	110 × 100 × 81
SR30XP / ST30XP	18 DI / 12 DO (Relay / Transistor)	4 AI / 2 AO	1 × 10/100 Mbps Adaptive	16 KB	125 × 100 × 81
SR40 / ST40	24 DI / 16 DO (Relay / Transistor)	None	1 × 10/100 Mbps Adaptive	20 KB	125 × 100 × 81
SR40XP / ST40XP	24 DI / 16 DO (Relay / Transistor)	6 AI / 2 AO	1 × 10/100 Mbps Adaptive	20 KB	175 × 100 × 81
SR60 / ST60	36 DI / 24 DO (Relay / Transistor)	None	1 × 10/100 Mbps Adaptive	24 KB	175 × 100 × 81

Compact Models (CR Series)

Compact models are space-saving CPU options. Some models have unique built-in I/O; other models follow the main specifications of their corresponding Standard model type.

Compact Model	Base Type	Built-in Features	Other Parameters
CR10XP	SR20 class	6 DI / 4 DO (Digital), 2 AI / 1 AO	Same as SR20
CR14XP	SR20 class	8 DI / 6 DO (Digital), 2 AI / 1 AO	Same as SR20
CR20	SR20	See base type	Same as SR20
CR20XP	SR20XP	See base type	Same as SR20XP
CR30	SR30	See base type	Same as SR30
CR30XP	SR30XP	See base type	Same as SR30XP
CR40	SR40	See base type	Same as SR40
CR60	SR60	See base type	Same as SR60

Note: CR20 / CR20XP / CR30 / CR30XP / CR40 / CR60 follow the key specifications of the corresponding SR base type. CR10XP and CR14XP list their specific built-in I/O above.

FAQ

Q: What is the difference between SR and ST?

SR uses relay outputs for general loads. ST uses transistor outputs for high-speed switching.

Q: Which models include analog I/O?

XP and PRO models include built-in analog I/O (see the Standard Models table).

Q: When should I choose Compact (CR) models?

Choose CR models when cabinet space is limited or you need a compact CPU format for small machines.

Need Help Choosing a Model?

Tell us your required DI/DO count, whether you need analog I/O (AI/AO), and output type (Relay or Transistor). We will recommend the best Smart 200 Standard PLC model for your project.