The LX2N-4AD-TC is an analog input module designed for use with thermocouples, which are temperature sensors used to measure temperature in various industrial applications. This module has four independent inputs, each capable of detecting signals from (4 channel) thermocouples of types J and K.

Each input can be configured independently to work with the appropriate thermocouple type. The electrical signal received at each input is converted into a digital numerical value with a sign. This converted value is then stored in a buffer memory in the module.

The PLC (programmable logic controller) is responsible for reading the stored data and converting it further as required. The module also allows for calculating a mean value from a predetermined number of measurements to obtain stable digital results.

To utilize this feature, the number of measurements required must be transferred by the PLC program to a buffer memory of the special function module. Once the value has been determined, it is available in another memory address for use by the PLC or other devices.

Here are the general specifications for the LX2N-4AD-TC analog input module:

- Conforms to LX1N/LX2N/LX2NC base units
- Power supply: 5 V DC / 30 mA (from base unit), 24 V DC / 50mA
- Analog inputs: 4 (J or KJ type)
- Compensated temperature range: -100 – +600°C (J type) / -100 – +1200°C (K type)
- Digital output: -1000 – +6000 (J type) / -1000 – +12000 (K type)
- Resolution: 0.3°C (J type) / 0.4°C (K type)
- Overall accuracy: ±0.5%
- Conversion speed: 240 ms per channel (±2%)
- Related I/O points: 8
- Weight: 0.3 kg
- Dimensions (WxHxD): 55 x 90 x 87 mm

Note: that this module requires a base unit, such as the LX1N or LX2N, to function properly. Also, the compensated temperature range and resolution may vary depending on the specific thermocouple being used.

Editor notes: "Dear friends, this module and its supported PLC models have now been replaced by newer models. If you are starting an automation project from scratch, we recommend that you choose our newer models instead. Thank you for your understanding!"

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