TX2N-2AD is an 2 Point analog input extension block manufactured by HCFA. This extension block is designed to convert analog signals to digital signals, providing two input channels for voltage (010V DC, 05V DC) or current (4~20mA DC).

The TX2N-2AD block has a high accuracy with 12-bit resolution, allowing it to provide precise analog to digital conversion. The block is equipped with two input channels that can handle either voltage or current input, and the input channels have the same input characteristics.

The analog input range for the block is 010V DC, 05V DC for voltage input, and 4~20mA DC for current input. It is important to note that the block may be damaged by input voltage in excess of -0.5V to +15V DC for voltage input, and input voltage in excess of -2mA to +60mA for current input.

The digital resolution of the block is 12-bit binary, providing a resolution of 2.5mV for 10V input, 1.25mV for 5V input, and 4μA for (20-4)mA input. The integrated accuracy is ±1% for full-scale 10V and ±1% for full-scale (20-4)mA input.

The conversion time for each channel is 2.5ms, and the block is isolated using a photocoupler to separate the analog input area from the PLC. The block is also isolated using a DC/DC converter to separate the power supply from the analog input area. However, the two channels are not isolated from each other.

The TX2N-2AD block has two power supply options, DC5V/20mA or DC24V/50mA, both of which are internally supplied from the main unit. The block occupies eight input or output points, which can be either inputs or outputs.

The block is compatible with several HCFA PLCs, including the LX1N, HCA2, HCA8, HCA8C, and HCA2C series. Conversion blocks are needed for compatibility with some PLCs.

The weight of the block is 0.2kg, making it a lightweight and easy to handle option for analog to digital conversion.