The Schneider TM2ALM3LT is an analog I/O module for the Modicon M238 logic controller, now obsolete. It gives you two analog inputs and one analog output on a slim 23.5 mm wide package — fits into the M238 rack without crowding adjacent modules. Inputs accept 3-wire Pt100 probes, thermocouples J/K/T, 0-10 V, or 4-20 mA. The single output can be configured as 4-20 mA or 0-10 V. That covers most analog signals a small machine cell throws at it. Conversion time runs 20 ms plus one controller cycle for most inputs, 60 ms for thermocouples. Total error across all ranges is ±1% of full scale; repeat accuracy holds ±0.5% FS. Tight enough for temperature monitoring or basic process control.
TM2ALM3LT Analog I/O Module, 2AI/1AO, Obsolete
MPNTM2ALM3LT
Obsolete
Schneider Modicon M238 analog I/O module, TM2ALM3LT, 2 analog inputs, 1 analog output, 24 VDC, obsolete.
$436.00 – $942.07Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Load type | Resistive |
| Type of cable | Shielded cable |
| Range of product | Modicon M238 logic controller |
| Analogue input type | 3-wire Pt probe temperature probe - 100...500 °C differential thermocouple 0...1200 °C thermocouple J differential thermocouple 0...1300 °C thermocouple K differential thermocouple 0...400 °C thermocouple T differential |
| Analogue output type | Current 4...20 mA Voltage 0...10 V |
| Product or component type | Input/output analog module |
| Supply voltage limits | 19.2...30 V |
| Supply voltage | 24 V DC |
| Current consumption | 50 mA 24 V DC external 50 mA 5 V DC internal |
| Electrical connection | 1 removable screw terminal block |
| Depth | 2.8 in (70 mm) |
| Width | 0.9 in (23.5 mm) |
All specifications
| Parameter | Value |
|---|---|
| Height | 3.5 in (90 mm) |
| Supply | External supply |
| Category | US1PC1222531 |
| Cross talk | = 1 MOhm |
| Input level | Low level |
| Total error | +/-1 %FS current current +/-1 %FS temperature probe +/-1 %FS thermocouple +/-1 %FS voltage voltage |
| Output error | +/- 1 %FS |
| Non-linearity | +/- 0.2 %FS current current +/- 0.2 %FS temperature probe +/- 0.2 %FS thermocouple +/- 0.2 %FS voltage voltage |
| Output ripple | <= 1 LSB |
| Conversion time | 20 ms + 1 controller cycle time |
| Repeat accuracy | +/-0.5 %FS input/output |
| Measurement error | +/- 0.2 % of full scale - 100...500 °C 3-wire Pt probe 25 °C +/- 0.2 % of full scale 0...10 V 0...10 V 25 °C +/- 0.2 % of full scale 4...20 mA 4...20 mA 25 °C 0.2 % of full scale +/- 4 °C 0...1200 °C thermocouple J 25 °C 0.2 % of full scale +/- 4 °C 0...1300 °C thermocouple K 25 °C 0.2 % of full scale +/- 4 °C 0...400 °C thermocouple T 25 °C |
| Sampling duration | 20 ms temperature probe 60 ms thermocouple |
| Acquisition period | 60 ms per channel + 1 controller cycle time thermocouple 80 ms per channel + 1 controller cycle time |
| Stabilisation time | 20 ms |
| Dielectric strength | 500 V between I/O channel 500 V between the I/O and the external supply circuit 500 V between the I/O and internal logic |
| Load impedance ohmic | >= 2000 Ohm voltage <= 300 Ohm current |
| Analogue input number | 2 |
| Analogue output number | 1 |
| Temperature coefficient | +/-0.006 %FS/°C - 100...500 °C 3-wire Pt probe +/-0.006 %FS/°C 0...1200 °C thermocouple J +/-0.006 %FS/°C 0...1300 °C thermocouple K +/-0.006 %FS/°C 0...400 °C thermocouple T +/-0.015 %FS/°C 0...10 V 0...10 V +/-0.015 %FS/°C 4...20 mA 4...20 mA |
| Insulation between channel and internal logic | Photocoupler |
Product details
MPN
TM2ALM3LT