1762-IF4 MicroLogix 4 Point Analog Input PLC Module

Product Introduce

1762-IF4 is a compact 4-channel differential bipolar analog input module that can collect ±10V DC voltage and 4-20mA current signals. It is suitable for 2-wire, 3-wire and 4-wire transmitters. It can convert analog signals from sensors, transmitters and other equipment into digital signals and transmit them to the controller. It also supports original/proportional and PID scaling data formats. The voltage input resolution is 16 bits and the current input is 16 bits. 15 bits; the comprehensive accuracy reaches ±0.32% full scale at the operating temperature of – 20℃ – 65℃, and the accuracy can be improved to ±0.24% full scale at 25℃ normal temperature; the common mode rejection ratio is greater than 55dB at 50/60Hz, which can effectively reduce electromagnetic interference.

FAQ:

1. The common mode rejection ratio of 1762-IF4 is >55dB. What measures need to be taken during actual wiring to further reduce electromagnetic interference and avoid analog signal distortion?

1. Use twisted-pair shielded cables, with a distance of ≥30cm and a 90° intersection with the power lines, and the shielding layer is grounded at one end (the control cabinet side is connected to a grounding bar).
2. Keep away from interference sources such as frequency converters and contactors. The voltage signal wiring is ≤300m and the current signal is ≤1000m. If it is too long, add a repeater.
3. The terminals are crimped tightly, the ANLG Com common terminal is reliably grounded (ground resistance ≤ 4Ω), and a signal isolator is installed in strong interference scenarios.
4. Enable module software filtering or install a passive filter, and install a surge protector in the control cabinet.

2.The 1762-IF4 voltage input resolution is 16 bits and the current input is 15 bits. How to set parameters in the MicroLogix controller to achieve precise scaling and range conversion of the signal?

1. Hardware configuration: add the module, set the channel signal type/range, check the “original/ratio” format (16-bit voltage corresponds to 0-32760, 15-bit current corresponds to 4mA→6241, 20mA→31206), and download the configuration.
2. SCP instruction programming: Add the SCP instruction, fill in the module channel address at the input end, fill in the original signal range at the input extreme value, fill in the physical quantity range at the scaling extreme value, and store the register at the output end.
3. Verify calibration: simulate signal testing, check output values, and fine-tune parameters to ensure accuracy.

3.The 1762-IF4 module is compatible with MicroLogix 1100/1200/1400 series PLC. Is it compatible with MicroLogix 1500?

The 1762-IF4 module is not compatible with MicroLogix 1500.