1756-IF16H  可编程逻辑控制器自动化 支持通过硬接线

【产品详情】

Allen-Bradley 1756-IF16H 是 1756 ControlLogix 可编程逻辑控制器自动化 （PAC） 的模拟输入模块。它支持通过硬接线和高速可寻址远程传感器 （HART） 通信协议集成 0-20 mA 或 4-20 mA 输入信号。该模块为每个通道提供十六 （16） 个差分电流信号和一 （1） 个 HART 调制解调器。

1756-IF16H 具有采用逐次逼近方法的集成模数转换器 （ADC）。模拟转换分辨率范围为 16-21 位，可显示更多测量点。转换后的信号以整数模式（左对齐，2 秒补码）保存在 IEEE 32 位浮点数中。

Allen-Bradley 建议在将信号端接到 1756-IF16H 时使用单线连接。线径为0.33...2.1 毫米2 （22...14 AWG） 实心或绞合屏蔽铜线，绝缘等级为 105 °C （221 °F） 或更高，最大绝缘厚度为 1.2 毫米（3/64 英寸）。与 1756-IF16H 配合使用的兼容可拆卸接线端子 （RTB） 是 1756-TBCH 和 1756-TBS6H。

1756-IF16H 的校准精度优于所有滤波器量程的 0.13%，而模块误差为量程的 0.3%。该模块的输入扫描时间为 11...328 ms，与滤波器相关，如果所有通道都启用了HART，则模块HART扫描时间估计为1秒。

1756-IF16H 允许您在三种数据格式中选择使用哪种格式：仅模拟、模拟和 HART PV 以及按通道的模拟和 HART。选择要使用的正确数据格式非常重要，因为它决定了模块的 Input 标记中包含哪些值以及应用程序可用的功能。“仅模拟”格式仅包含模拟信号值和模拟状态。当您希望标签的成员像非HART模拟输入模块一样排列时，建议使用模拟和HART PV。当您选择这种数据格式时，所有通道的模拟值都分组在标签末尾附近，从而可以轻松地一次查看所有 16 个模拟值。模块中的每个通道都有两个输入范围，分别为 0 至 20 毫安和 4 至 20 毫安，后者用于 HART 仪器。这些范围指定模块可以检测到的最小和最大信号。该模块还具有一个模块滤波器，用于衰减从指定频率开始的输入信号。这在模块范围内应用，影响所有通道。请注意，HART仪器不应使用1000赫兹模块滤波器。实时采样 （RTS） 也是该模块的另一个功能。在模块范围内应用，该参数指示模块扫描其输入通道的频率并获取所有可用数据。扫描后，模块将对数据进行多播。但在模块配置之前，您需要设置实时采样 （RTS） 周期和请求的数据包间隔 （RPI） 周期。它还具有低于范围和超出范围的检测功能，允许模块检测其工作是否超出输入范围的限制。这是一个状态指示，将告诉您输入信号的测量不准确，因为信号超出了模块的测量能力。该模块基于每个通道应用，具有一个数字滤波器，可平滑输入数据噪声瞬变。此外，该模块还具有断线检测功能，当信号线与其中一个通道断开连接时，或者如果配置为 4 至 20 毫安范围，则当从模块中移除 RTB 时，它会通知您。

1756-IF16H  可编程逻辑控制器自动化 支持通过硬接线

【英文介绍】

Allen-Bradley 1756-IF16H is an analog input module for the 1756 ControlLogix Programmable Logic Controller Automation (PAC). It supports integration of 0-20 mA or 4-20 mA input signals via hardwired and high-speed addressable Remote Sensor (HART) communication protocols. The module provides sixteen (16) differential current signals and one (1) HART modem for each channel.

The 1756-IF16H features an integrated analog-to-digital converter (ADC) using a successive approximation method. The analog conversion resolution ranges from 16 to 21 bits, allowing more measurement points to be displayed. The converted signal is saved in integer mode (left-justified, 2-second complement) in IEEE 32-bit floating-point numbers.

Allen-Bradley recommended using a single wire connection when connecting the signal end to 1756-IF16H. The wire diameter is 0.33... 2.1 mm 2 (22... 14 AWG) Solid or stranded shielded copper wire with an insulation class of 105 °C (221 °F) or higher and a maximum insulation thickness of 1.2 mm (3/64 in). Compatible detachable terminal blocks (RTB) for use with the 1756-IF16H are the 1756-TBCH and 1756-TBS6H.

The calibration accuracy of the 1756-IF16H is better than 0.13% of all filter ranges, while the module error is 0.3% of the range. The input scan time of this module is 11... 328 ms, filter dependent, the module HART scan time is estimated to be 1 second if all channels are HART enabled.

The 1756-IF16H allows you to choose which of three data formats to use: analog only, analog and HART PV, and analog and HART by channel. Choosing the correct data format to use is important because it determines which values are included in the module's Input tag and the functionality available to the application. The "analog only" format contains only analog signal values and analog states. Analog and HART PV are recommended when you want the members of the tag to be arranged like non-HART analog input modules. When you choose this data format, the analog values for all channels are grouped near the end of the label, making it easy to view all 16 analog values at once. Each channel in the module has two input ranges of 0 to 20 mA and 4 to 20 mA, the latter for HART instruments. These ranges specify the minimum and maximum signals that the module can detect. The module also has a module filter for attenuating input signals starting at a specified frequency. This applies within the scope of the module and affects all channels. Note that HART instruments should not use 1000 Hz module filters. Real-time sampling (RTS) is another feature of this module. Applied within the scope of the module, this parameter indicates how often the module scans its input channel and obtains all available data. After scanning, the module will multicast the data. But before the module is configured, you need to set the real-time sampling (RTS) period and the requested Packet Interval (RPI) period. It also has below range and out of range detection, allowing the module to detect if its work is outside the limits of the input range. This is a status indication that will tell you that the measurement of the input signal is not accurate because the signal exceeds the module's measurement capability. The module is based on a per-channel application with a digital filter that smooths noise transients in the input data. In addition, the module has a break detection function, which notifies you when the signal line is disconnected from one of the channels, or if configured in the 4 to 20 mah range, when the RTB is removed from the module.

1756-IF16H  可编程逻辑控制器自动化 支持通过硬接线

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