1769-IF8  是一款紧凑型 I/O 模拟量输入模块

1769-IF8  是一款紧凑型 I/O 模拟量输入模块

Allen-Bradley 的 1769-IF8 紧凑型 I/O 模拟量输入模块是一款模拟量输入模块，具有八 （8） 个差分输入，电压范围为 +/-10 伏直流电、0 至 10 伏直流电、0 至 5 伏直流电和 1 至 5 伏直流电，电流范围为 0 至 20 mA 和 4 至 0 mA。

1769-IF8 在 120 V DC 时的背板消耗电流为 5 mA，在 70 V DC 时为 24 mA，运行时可散发 3.64 W 的热量。它使用 Delta -Sigma 模数转换器，其分辨率为 16 位单极性或 15 位加号。它具有与滤波器/配置相关的通道响应速度。它在 120 V DC 时的最大总线消耗电流为 5 mA，在 70 V DC 时为 24 mA，电压端的输入阻抗为 220 kg，电流端的输入阻抗为 250 Ω。

1769-IF8 的公共失调电压范围为每通道 +/-10 伏直流电，在 60 至 50 赫兹时的共模抑制比大于 60 dB。该模拟输入模块对电压信号和电流信号的总体精度分别为 +/-0.2% 和 0.35%，而电压和电流信号的总漂移精度分别为 +/-0.003%和每摄氏度 +/-0.0045%。它还具有 +/-0.03% 的输入非线性和 +/-0.03% 的可重复性。1769-IF8 有一个指示灯，显示模块的故障状态。1769-IF8 通过位报告对超量程或欠量程进行自动自诊断，还可以处理报警。它在 30.0 mA 电压端连续具有 +/-1 V DC 的最大输入端过载，在 +/-32.7 V DC 处具有 +/-6 mA 的过载。其工作温度范围在 0 至 60 摄氏度（32 至 140 华氏度）之间，相对湿度限制为 95%，有冷凝。它重约 450 克（0.99 磅），尺寸约为 118 x 87 x 52.5 毫米。

1769-IF8 是由 Allen-Bradley 制造的紧凑型 I/O 模块，与 1769 CompactLogix 控制器和 MicroLogix 1500 控制器兼容。该控制器具有嵌入式八 （8） 个输入通道，支持差分和单端接线。

可配置信号为 0-20 mA 和 4-20mA 以及 +/10VDC、1-5VDC、0-5VDC、0-10VDC。

输入通道接收的模拟信号使用Delta-Sigma转换方法单独转换。转换后的信号存储在处理器的内存中，单极性为 16 位，双极性为 15 位。寄存器内有表示输入信号值的二进制位数组。为了正确显示等效的测量值或工程值，使用比例指令对数据进行调节。处理的数据可以配置为工程单位，根据 PID、百分比范围和原始数据进行缩放。

1769-IF8 的电源距离额定值为 8 个模块。这是指物理模块位置，这意味着它不能安装在距离 8 CompactLogix 电源 1769 个模块的地方。此电源距离额定值可确保模块将获得适当的背板电源。

1769-IF8  是一款紧凑型 I/O 模拟量输入模块

Allen-Bradley's 1769-IF8 compact I/O Analog input module is an analog input module with eight (8) differential inputs in the voltage range +/-10 volts DC, 0 to 10 volts DC, 0 to 5 volts DC, and 1 to 5 volts DC. Current ranges are 0 to 20 mA and 4 to 0 mA.

The backplane of the 1769-IF8 consumes 5 mA at 120 V DC, 24 mA at 70 V DC, and emits 3.64 W of heat when operating. It uses a Delta-Sigma analog-to-digital converter with a resolution of 16-bit unipolar or 15-bit plus sign. It has a filter/configuration-dependent channel response speed. It has a maximum bus current consumption of 5 mA at 120 V DC, 24 mA at 70 V DC, and an input impedance of 220 kg at the voltage end and 250 Ω at the current end.

The 1769-IF8 has a common offset voltage range of +/-10 volts DC per channel and a common-mode rejection ratio greater than 60 dB at 60 to 50 Hz. The overall accuracy of the analog input module for voltage and current signals is +/-0.2% and 0.35%, respectively, while the total drift accuracy of the voltage and current signals is +/-0.003% and +/-0.0045% per degree Celsius, respectively. It also has +/-0.03% input nonlinearity and +/-0.03% repeatability. The 1769-IF8 has an indicator that shows the fault status of the module. The 1769-IF8 provides automatic self-diagnosis of overrange or underrange with bit reports and can also handle alarms. It has a continuous maximum input overload of +/-1 V DC at the 30.0 mA voltage end and +/-6 mA at +/ -32.7V DC. It operates in a temperature range of 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit), with a relative humidity limit of 95% and condensation. It weighs about 450 grams (0.99 lb) and measures about 118 x 87 x 52.5 mm.

The 1769-IF8 is a compact I/O module manufactured by Allen-Bradley that is compatible with the 1769 CompactLogix controller and the MicroLogix 1500 controller. The controller has an embedded eight (8) input channels and supports differential and single-ended wiring.

Configurable signals are 0-20 mA and 4-20mA as well as +/10VDC, 1-5VDC, 0-5VDC, and 0-10VDC.

The analog signal received by the input channel is converted separately using the Delta-Sigma conversion method. The converted signal is stored in the processor's memory and is 16-bit unipolar and 15-bit bipolar. The register contains an array of binary bits representing the value of the input signal. In order to correctly display equivalent measured or engineered values, the data is adjusted using proportional commands. The data processed can be configured as engineering units, scaled according to PID, percentage range, and raw data.

The 1769-IF8 has a power distance rating of 8 modules. This refers to the physical module location, which means it cannot be installed 1769 modules away from the 8 CompactLogix power supply. This power distance rating ensures that the module will receive the appropriate backplane power supply.