Schneider Electric TM3AI8 Analog Input Module
The TM3AI8 adds 8 analog inputs to Modicon TM3 and M2xx PLC systems. Each channel is software configurable for voltage or current. It fits machine builders who need fast, repeatable analog sampling. Conversion starts at 1 ms plus 1 ms per channel. Wiring uses a removable screw terminal block with 3.81 mm pitch. The module suits compact cabinets and distributed control. Oiltech Controls supplies tested units with a 12-month warranty.
Technical Data
- Brand: Schneider Electric
- Model: TM3AI8
- Series: Modicon TM3
- Module type: Analog input, configurable per channel
- Channels: 8
- Signal type: 0-10 Vdc, ±10 Vdc, 0-20 mA, 4-20 mA
- Resolution: 12 bits (11 bits + sign for bipolar)
- Accuracy: ±0.1% FS at 25 °C; ±1% FS over temperature
- Isolation: 1500 V AC input to supply; 500 V AC input to logic
- Response time: 1 ms conversion + 1 ms per channel + 1 controller cycle; 1 ms sampling per channel
- Wiring: Removable screw terminal block, 3.81 mm pitch
- Supply voltage: 24 Vdc via TM3 bus
- Bus current: 50 mA at 5 Vdc (full load); 40 mA at 24 Vdc
- Operating temperature: 0 to +55 °C
- Storage temperature: -25 to +70 °C
- Protection rating: IP20
- Dimensions (H×W×D): 90 × 23.6 × 70 mm
- Weight: 0.115 kg
- Compatibility: Modicon M221, M241, M251, M262
- Lifecycle: Active (Last verified: 2026-09)
Oiltech Controls Review
- Tested before shipment for channel accuracy and bus response.
- Good choice for retrofits and spare part stock.
- Supports legacy M2xx platforms still in service.
- Clear labeling helps fast panel wiring.
- Compact 23.6 mm width saves DIN rail space.
Oiltech Controls Insight: Suitable Equipment
- Modicon M221, M241, M251, and M262 PLC systems.
- Machines needing 8 analog inputs in one slice.
- Process skids with 4-20 mA transmitters.
- Packaging, assembly, and material handling lines.
- Control cabinets with limited depth and width.
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spare parts.
- Global shipment support.
- Tested industrial surplus and refurbished options.
- 12-month warranty on every module.
- Technical verification before shipment.
- Support for obsolete control systems.
Warranty, Shipping, and Contact
- 12-month warranty from Oiltech Controls Limited.
- Dispatch in 24 to 28 hours after order confirmation.
- Shipping by FedEx, UPS, and DHL.
- Email: info@oiltechcontrols.com
- WhatsApp: +86 158 8020 0923
FAQ
Q: Can I mix voltage and current inputs on the same TM3AI8?
A: Yes. Each channel is software configurable. You can set 0-10 V, ±10 V, 0-20 mA, or 4-20 mA per channel.
Q: How do I know if the TM3AI8 fits my PLC?
A: Check your controller model. It works with Modicon M221, M241, M251, and M262. Also confirm your TM3 bus power budget.
Q: What should I check before buying a used TM3AI8?
A: Ask for channel test results. Confirm the terminal block is included. Verify firmware and bus compatibility. Oiltech Controls tests each unit before shipment.
Q: Why does accuracy change with temperature?
A: The module holds ±0.1% FS at 25 °C. Over the full temperature range, drift can reach ±1% FS. Use stable cabinet cooling for best results.
Q: Is the TM3AI8 still available?
A: Yes. The lifecycle is active as of 2026-09. Oiltech Controls also supports obsolete Modicon systems.
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