High-performance I/O expansion for Siemens S7‑200 SMART, perfect for cost-effective automation with up to 16 modules.
Product Overview
The Smart 200 economical expansion module series (models GM DE08/16, GM DR08/QR16, GM DR16/32, GM AE04/08, GM AQ04/08, GM AM06/12/16, GM AR04, GM AN04/08, GM AT04) seamlessly extends the I/O capabilities of the Smart 200 economy main units. It supports up to 16 modules in a flexible configuration, maintains a sleek form factor, and delivers analog, digital, temperature, and relay I/O with excellent cost-to-performance. These modules are not compatible with standard Smart main unit slots but pair perfectly with the dedicated economy series, making them ideal for tailored, budget-conscious automation setups.
How to Use
- Select appropriate modules (e.g., digital input/output DE08/16, analog AE/AQ, temperature AR/AN/AT).
- Mount modules on DIN rail next to the Smart 200 economy CPU using consistent EM bus spacing.
- Power and ground per CPU and apply 5 V/24 V as required.
- Use Siemens STEP 7‑Micro/WIN SMART to add modules in hardware configuration—Wizard simplifies setup.
- Download program via microSD or Ethernet.
- Verify I/O via software diagnostics LED for status and signal integrity.
Tips: do not exceed 16 modules; mind the 5 V bus loading and available 5 V/24 V sensor power on each CPU model; configure signal board if you need extra serial communication. Avoid mixing with standard Smart units.
Frequently Asked Questions (FAQ)
Q: What CPUs are compatible?
A: Only the Smart economy series (SR/ST20/30/40/60) CPUs designed for the Smart 200 economy line. Not compatible with standard Smart main units.
Q: How many modules can be attached?
A: Up to 16 in total per the product spec. Overloading can cause bus voltage drop.
Q: What I/O types are supported?
A: Digital (DE/DR), analog (AE/AQ), temperature (RTD/TC via AR/AN/AT), and relay modules in various configurations.
Q: What bus power is needed?
A: Modules derive 5 V from the CPU I/O bus; power budget differs by CPU (e.g., SR20 = 740 mA, ST40 = 1110 mA).
Q: How do I configure modules in software?
A: Use STEP 7‑Micro/WIN SMART hardware config wizard—detects modules automatically.
Q: Can I use microSD for module backup?
A: Yes—SD can backup/restore configurations and firmware.
Q: Are modules hot-swappable?
A: No—power down before adding/removing.
Q: What is the input accuracy on analog modules?
A: 12-bit resolution, ±0.5% accuracy.
Q: What expansion options exist for serial communications?
A: Signal board CM01 adds RS232/RS485; supported in economy series.
Q: Are temperature inputs for thermocouples supported?
A: Yes – AR, AN, AT modules support PT100, NTC, and thermocouple types.
User Review Summary
Across industrial automation forums and platform reviews:
• Pros: Great value, broad I/O options, seamless integration with S7‑200 SMART.
• Cons: Users note attention needed to bus power and compatibility with CPU models.
Comparison with Competing Products
Siemens EM AI04 (6ES7288‑3AE04‑0AA0) – Official Siemens analog input module, $188.
Siemens EM DI/DO16 (6ES7288‑2DR16‑0AA0) – Siemens-certified digital I/O, $116.61.
Compared to generic economy modules, Siemens originals carry higher cost but full OEM support, extensive datasheets, and global warranties. Economy models offer competitive pricing, same specs, sufficient for non-critical installations.
Technical Specifications
• I/O Types: Digital input/output, analog input/output, RTD/TC temp, relay
• Resolution: 12-bit analog, ±0.5% accuracy
• Module count: Up to 16
• Power bus load: Varies by CPU (up to 1110 mA @ 5 V)
• Mounting: DIN rail, standard EM bus spacing
• Environmental: Industrial grade (assumed similar to S7‑200 SMART standards)
• Configuration: STEP7‑Micro/WIN SMART wizard support
Brand/Manufacturer Info
Gongbei supply OEM modules compatible with Siemens S7‑200 Smart economy line. Siemens S7‑200 SMART brand—established for micro-PLC market, known for reliability and scalability . Gongbei modules replicate OEM specs, aiming for cost-performance.
Purchase Recommendations
GongBei：https://www.gongbei.store/smart-200-economical-expansion-module/#