AS-Interface (AS-i) Communication Modules Selection Guide: Technical Criteria & Application Standards
AS-Interface (AS-i) Communication Modules selection guide: technical parameters, mounting and compliance standards, and Siemens comparison.
AS-Interface (AS-i) communication modules are industrial fieldbus components that connect field sensors and actuators to a higher-level PLC system over a single two-wire line in machine and plant automation. They are used on conveyor lines, packaging machinery and process plants to gather distributed I/O points without complex point-to-point wiring. This category includes Siemens 3RK and 3RX AS-i digital and analog I/O modules, ASIsafe safety modules, S7-1200/ET200SP master cards, power supplies, repeaters, M12 splitters and yellow/black AS-i flat cables. Choose the module according to the number and type of field I/O points (DI/DO or AI/AO), ingress protection rating (in-cabinet IP20 or field-mount IP67) and the host PLC family. While the standard yellow AS-i flat cable carries both data and power, the black AS-i cable is run alongside where 24V DC auxiliary actuator power is required. AS-i modules are designed for the lower sensor-actuator level: they do not replace industrial ethernet switches on high-bandwidth plant backbones. The AS-Interface (AS-i) Communication Modules category on Welibaba includes 54 active models from leading manufacturers such as Siemens.
Key Technical Parameters for Selecting AS-Interface (AS-i) Communication Modules
To specify the right AS-Interface (AS-i) Communication Modules model for your panel or installation, verify the following parameters against your engineering schedule:
| Parameter | Typical Catalog Values | Verification Note |
|---|---|---|
| Model | 3RK1100-1CQ20-0AA3, 3RK1107-0BG00-2AA2, 3RK1107-1BQ40-0AA3, 3RK1107-2BQ40-0AA3 | Verify against project schedule and load calculation |
| Product Type | AS-Interface Haberleşme Donanımı | Verify against project schedule and load calculation |
| Product function and configuration | 1x4A tekli Data Decoupling Modülü, 2 Analog çıkış - Gerilim yada akım seçilebilir (1-5V, 0-10V, 0/4-20 mA) 2 Emniyetli giriş - ASIsafe 17.5F | Verify against project schedule and load calculation |
| IP Rating | IP20, IP67 | Verify against project schedule and load calculation |
Installation, Compatibility, and Commissioning Checklist
- Electrical & Mechanical Matching: Confirm that rated voltage, current capacity, and mounting dimensions align with the upstream and downstream components in Industrial Communication.
- Environmental & Enclosure Rating: Check IP protection class, housing material, and terminal capacity for dusty, humid, or high-vibration industrial environments.
- Related Product Groups: If your application calls for a different form factor or rating, compare sibling categories such as Industrial Ethernet Switches, Energy Monitoring Software and Services, Communication Antennas.
Frequently Asked Questions
What is the first parameter to check when selecting AS-Interface (AS-i) Communication Modules?
Start by confirming the circuit's rated electrical values and physical mounting dimensions, then use the technical attribute filters on the AS-Interface (AS-i) Communication Modules page to narrow down compatible series.
Which AS-Interface (AS-i) Communication Modules brands are available on Welibaba?
Welibaba currently stocks 54 active models in this category from manufacturers including Siemens, complete with verified specifications and unit pricing.
How can I compare AS-Interface (AS-i) Communication Modules models by manufacturer part number?
You can search directly by manufacturer SKU/order code or use the category filter panel to compare equivalent models across brands side by side.