Analog I/O Modules Selection Guide: Technical Criteria & Application Standards
Analog I/O Modules selection guide: technical parameters, mounting and compliance standards, and Schneider Electric, Delta Electronics, GMT comparison.
An analog I/O module is an expansion module that adds to the PLC input channels reading continuously varying current and voltage signals together with output channels producing reference signals. It is used in applications that measure pressure, level or temperature and give a reference to a proportional valve or inverter, to save space on the rail by combining input and output in a single module. This category mainly contains Schneider Electric Modicon TM3 modules and cartridge modules for the M221, M241 and M200; input-only, output-only and combined models are listed together, and Delta Electronics and GMT models are also available. Select the module according to your PLC series, the number of input and output channels required, the signal type such as current, voltage or temperature sensor, and whether it will be an expansion module or a cartridge. For models with temperature inputs, verify the supported sensor type on the product page. A cartridge is not a substitute for an expansion module: it plugs into the slot on the front of the CPU and offers few channels, whereas TM3 modules are added beside the CPU to increase the channel count. The Analog I/O Modules category on Welibaba includes 24 active models from leading manufacturers such as Schneider Electric, Delta Electronics, GMT.
Key Technical Parameters for Selecting Analog I/O Modules
To specify the right Analog I/O Modules model for your panel or installation, verify the following parameters against your engineering schedule:
| Parameter | Typical Catalog Values | Verification Note |
|---|---|---|
| Product Weight | 0.012 kg, 0.015 kg, 0.024 kg, 0.055 kg | Verify against project schedule and load calculation |
| Series | EASY MODICON M200, Modicon Edge I/O NTS, Modicon M200, Modicon M221 | Verify against project schedule and load calculation |
| Depth | 114 mm, 15 mm, 21 mm, 70 mm | Verify against project schedule and load calculation |
| Width | 15 mm, 23.6 mm, 25 mm, 34 mm | 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 PLC Input and Output Modules.
- 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 Analog Input Modules, Analog Output Modules, Connection Modules.
Frequently Asked Questions
What is the first parameter to check when selecting Analog I/O Modules?
Start by confirming the circuit's rated electrical values and physical mounting dimensions, then use the technical attribute filters on the Analog I/O Modules page to narrow down compatible series.
Which Analog I/O Modules brands are available on Welibaba?
Welibaba currently stocks 24 active models in this category from manufacturers including Schneider Electric, Delta Electronics, GMT, complete with verified specifications and unit pricing.
How can I compare Analog I/O 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.