ABB 1VCF750170826 Analog Input

ABB 1VCF750170826 is an analog input module from ABB. Here is its related information:

Channel configuration: It usually has 4 independently configurable voltage or current input channels. The channels are grouped into 1 group, that is, 4 channels in one group.

Input signal type and range: It supports a variety of input signal types and ranges, such as voltage signals from 0V to + 5V, 0V to + 10V, -2.5V to + 2.5V, -5V to + 5V, etc.; current signals from 0mA to 20mA, 4mA to 20mA.

Resolution: For the above voltage and current signals, the resolution is generally 12 bits. However, for bipolar voltage signals of -2.5V to +2.5V, -5V to +5V, starting from version e0 or higher, the resolution is 13 bits (including the sign bit).

Signal connection: The negative pole of the input signal (I0- to I3-) is connected to terminals 3, 6, 9, and 12, and the positive pole (I0+ to I3+) is connected to terminals 2, 5, 8, and 11.

Input type: It is a differential input, which can effectively suppress common-mode interference and improve the anti-interference ability of the signal.

Isolation characteristics: There is no electrical isolation between the input and the I/O bus. When using it, you need to pay attention to the electrical safety design of the system.

Common-mode input range: The signal voltage plus the common-mode voltage must be within ±12V to ensure the accuracy of the input signal and the normal operation of the module.

Channel input resistance: When the voltage is input, the input resistance is greater than 1MΩ; when the current is input, the input resistance is about 250Ω.

Conversion error: At +25℃, the analog value conversion error caused by nonlinearity, factory adjustment error and resolution is typically ±0.5% of full scale for voltage signals, ±0.5% of full scale for current signals from 0mA to 20mA, and ±0.7% of full scale for current signals from 4mA to 20mA. The maximum error is ±2% of full scale at 0℃ to +60℃ or in the presence of electromagnetic interference.

Input filter time constant: The filter time constant for voltage and current inputs is 300μs, which can filter the input signal to a certain extent and reduce the impact of high-frequency noise.

Analog to digital conversion time: The typical value is 500μs per channel, with a fast conversion speed, which can meet the real-time requirements of most industrial control scenarios.

Overvoltage protection: For voltage input, it has overvoltage protection function and can withstand overvoltage up to 30V DC, which enhances the reliability and stability of the module.

Maximum cable length: For shielded cables, the maximum length is 100m; for unshielded cables, it needs to be determined according to specific requirements. Generally speaking, in order to ensure signal quality, it is recommended to shorten the length of unshielded cables as much as possible.