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TM2ARI8HT
Schneider TM2ARI8HT available at EU Automation. Get in touch today for a quick price.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
Schneider Electric TM2ARI8HT is an 8‑channel analogue input expansion module designed for temperature measurement using PTC/NTC resistance probes in the 100 to 10,000 Ohm range. Intended for integration with Modicon M238 controller systems (and compatible with Advantys OTB and Twido architectures), it provides non‑differential inputs with 10‑bit resolution for reliable multi-point temperature acquisition.
The module uses an external 24 V DC supply (operating range 20.4 to 28.8 V) and connects via removable screw terminal blocks for both power and sensor wiring, supporting straightforward panel build and maintenance. With a typical acquisition period of 160 ms per channel (plus one controller cycle time) and low cross talk (≤ 1 LSB), it is well suited to applications such as machine temperature monitoring, process thermal feedback, and distributed sensing where multiple probes must be read in a compact footprint. Photocoupler isolation between the I/O and internal logic (dielectric strength 2500 V) and the use of shielded cable help support stable measurements in industrial environments. The housing measures 23.5 mm (W) × 70 mm (D) × 90 mm (H) and weighs 0.085 kg.
The module uses an external 24 V DC supply (operating range 20.4 to 28.8 V) and connects via removable screw terminal blocks for both power and sensor wiring, supporting straightforward panel build and maintenance. With a typical acquisition period of 160 ms per channel (plus one controller cycle time) and low cross talk (≤ 1 LSB), it is well suited to applications such as machine temperature monitoring, process thermal feedback, and distributed sensing where multiple probes must be read in a compact footprint. Photocoupler isolation between the I/O and internal logic (dielectric strength 2500 V) and the use of shielded cable help support stable measurements in industrial environments. The housing measures 23.5 mm (W) × 70 mm (D) × 90 mm (H) and weighs 0.085 kg.
| Specification | Description |
|---|---|
| Manufacturer | Schneider Electric |
| Part Number | TM2ARI8HT |
| Product Type | Analogue input expansion module (temperature) |
| Product Range | Modicon M238 logic controller |
| Compatible Systems | Advantys OTB; Twido |
| Part Description | Compact expansion module providing eight analogue temperature inputs for PTC/NTC probes, designed to add reliable multi-channel temperature measurement to compatible control systems. |
| Number of Analogue Inputs | 8 |
| Input Sensor Type | PTC/NTC temperature probe, 100…10000 Ω |
| Input Configuration | Non-differential |
| Analogue Input Resolution | 10-bit (NTC) |
| Cross Talk | ≤ 1 LSB |
| Input Impedance | ≥ 1 MΩ |
| Sampling Duration | ≤ 160 ms |
| Acquisition Period | 160 ms per channel + 1 controller cycle time |
| Measurement Error | ±0.2% of full scale at 25 °C |
| Temperature Coefficient | ±0.01 %FS/°C |
| Repeat Accuracy | ±0.4 %FS |
| Non-linearity | ±0.002 %FS |
| Total Error | ±1 %FS |
| Recommended Cable Type | Shielded cable |
| Isolation (Channel to Internal Logic) | Photocoupler |
| Dielectric Strength | 2500 V between the I/O and internal logic |
| Supply Type | External supply |
| Rated Supply Voltage (Us) | 24 V DC |
| Supply Voltage Limits | 20.4…28.8 V |
| Current Consumption (External) | 45 mA at 24 V DC |
| Current Consumption (Internal) | 60 mA at 5 V DC |
| Electrical Connections | Removable screw terminal block (power supply); removable screw terminal block (sensors) |
| Mounting | 35 mm DIN rail |
| Dimensions (W × D × H) | 23.5 mm × 70 mm × 90 mm |
| Net Weight | 0.085 kg |
What does this module do in an automation system?
It adds 8 temperature-focused analogue input channels to a compatible controller or remote I/O setup, allowing PTC/NTC probe resistance measurements to be acquired and used for monitoring and control.
Which sensor types can be connected to the analogue inputs?
The inputs are intended for PTC/NTC temperature probes with a resistance range of 100 to 10,000 ohms (non-differential).
How many input channels are available and are they isolated from each other?
There are 8 analogue input channels. Channels are not isolated from each other, but the I/O section is isolated from the internal logic via photocoupler isolation.
What resolution does the module provide for measurements?
The module provides 10-bit resolution (1024 points) for NTC measurement processing.
What is the sampling and acquisition behaviour per channel?
Sampling duration is 160 ms, and the acquisition period is 160 ms per channel plus one controller cycle time.
What measurement accuracy should I expect?
Typical figures include measurement error of ±0.2% of full scale at 25 °C, repeat accuracy of ±0.4% FS, non-linearity of ±0.002% FS, and total error up to ±1% FS.
What power supply does the module require?
It uses an external 24 V DC supply (Us). The allowable supply voltage range is 20.4 to 28.8 V DC.
How much current does the module draw?
Current consumption is 45 mA at 24 V DC (external supply) and 60 mA at 5 V DC (internal).
What wiring type is recommended for the sensor connections?
Shielded cable is recommended for sensor wiring to help reduce electrical noise and improve measurement stability.
What terminal connections are used for wiring?
It uses removable screw terminal blocks: one for the power supply and one for the sensor inputs.
How is the module mounted in a control panel?
It is designed for mounting on a 35 mm DIN rail, and can also be panel-mounted using a mounting hole layout.
What are the physical dimensions of the module?
The module measures 23.5 mm (W) x 70 mm (D) x 90 mm (H).
What level of electrical isolation is provided between I/O and internal logic?
Dielectric strength is specified at 2500 V between the I/O and the internal logic.
Which Schneider automation ranges is it compatible with?
It is specified as compatible with Modicon M238 logic controller systems and also listed for use with Advantys OTB and Twido compatibility contexts, depending on the overall architecture.
Can the input channels influence each other during measurement?
Crosstalk is specified as ≤ 1 LSB, indicating minimal interaction between channels under normal operating conditions.
What is the approximate weight of the module for panel layout planning?
The net product weight is approximately 0.085 kg (about 85 g). If you need to reference it internally, this is Schneider TM2ARI8HT.
- Expanding Modicon M238 control systems with additional temperature measurement points using PTC/NTC probes
- Multi-zone temperature monitoring in industrial ovens, furnaces and heat-treatment equipment
- Machine temperature feedback for plastics and rubber processing (barrel, mould, die and tool temperature sensing)
- Condition monitoring of motors, gearboxes and bearing housings where resistive temperature probes are fitted
- Temperature supervision in packaging, bottling and food processing lines to maintain stable process conditions
- Monitoring heating and cooling circuits on skids, test rigs and pilot plants with several sensor inputs required
- HVAC and building-services panels needing multiple sensor channels for air handling, plant rooms and ductwork
- Temperature measurement for environmental chambers, drying cabinets and curing systems with several zones
- Cold-room and chiller plant monitoring where multiple probe inputs are required for alarms and trending
- Adding analogue temperature inputs to compatible Twido and Advantys OTB installations during panel upgrades or expansions
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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