1756-IF8H  具有HART功能的模拟输入模块

【产品详情】

Allen-Bradley 1756-TBCH 是来自 ControlLogix 控制器平台的模拟输入模块，该模块主要具有八 （8） 个差分输入通道，与电压和电流信号兼容。它还增加了与高速可寻址远程传感器（HART）协议的兼容性，每个模块只有一个HART调制解调器。1756-IF8H 的可配置电流信号包括行业标准的 0-20 mA 和 4-20 mA。对于电压输入信号，支持的电压为 +/-10VDC、0-5 VDC、1-5 VDC 和 0-10 VDC。该模块的分辨率范围为 16-21 位，背板电流要求为 300 mA @ 5.1 VDC 和 135 mA @ 24 VDC。它的总背板功耗为 4.77 瓦，而散热因配置的信号而异。对于电压信号处理，热耗散为11/0 BTU / hr，而对于电流，热耗散为13.7 BTU / hr。它具有 5 秒的开路检测时间和 30 VDC 和 8 VDC 的过压保护，用于电压和电流信号配置。此模块是单宽模块，因此占用 1756 机箱的单个插槽。它可以是本地 I/O 或分布式 I/O 系统的一部分。1756-IF8H的HART扫描时间为18...488毫秒，如果启用HART则为1秒，而激活所有通道HART，估计扫描时间为10秒。模块直通配置以及与HART通信和设备的通信可能会显著增加扫描时间。1756-IF8H使用逐次逼近作为输入转换方法，而输出转换方法是通过R梯形DAC，单调性，无失码。

Allen-Bradley 1756-IF8H是属于ControlLogix系统的HART模拟模块。它需要一个 36 位弹簧夹 RTB 或可拆卸的接线端子外壳，它可以是 1756-TBCH 或 1756-TBS6H，并且与 HART 5、6 和 7 兼容。该模块提供8个差分电压或电流输入，每个模块一个HART调制解调器。该 1756-IF8H 输入模块从过程值变送器接收信号，然后将其转换为相应的测量值，以便在 Logix 控制器中使用。1756-IF8H 有三种数据格式供您使用 Studio 5000 Logix 设计器进行选择：仅模拟、模拟和 HART PV，以及按通道划分的模拟和 HART。如果您希望标签的成员像非HART模拟输入模块的成员一样排列，则应选择模拟和HART PV格式。模拟值在标签末尾附近组合在一起，以便更容易同时查看所有 8 个模拟值。但是，如果您希望将每个通道的状态、模拟值和设备状态分组到一个标签中，则应按通道格式选择模拟和HART。这将使您更轻松地查看与现场设备相关的所有数据。

使用此模块可以让您在一个模块中实现模拟和HART连接，HART命令可以作为计划外消息与1756-IF8H一起传输。1756-IF8H 的其他功能包括多个电流和电压输入范围、实时采样、过程报警、断线检测、模块滤波器、欠量程和超量程检测、速率报警和高速公路可寻址远程传感器 （HART） 通信。1756-IF8H 对模块中的每个通道都有可变的操作范围。您可以选择的范围包括 -10 至 10 伏、0 至 5 伏、0 至 10 伏、0 至 20 毫安和 4 至 20 毫安，HART 仪器使用后一个范围。该模块的分辨率范围为 16 到 21 位。背板电压和电流额定值为 5.1 伏直流、300 毫安、24 伏直流和 135 毫安，其总背板功率为 4.77 瓦。电流的电压功耗分别为 3.21 瓦和 4.01 瓦，并且还具有 30 伏直流（电压）和 8 伏直流（电流）的最大过压保护。

1756-IF8H  具有HART功能的模拟输入模块

【英文介绍】

Allen-Bradley 1756-TBCH is an analog input module from the ControlLogix controller platform that primarily features eight (8) differential input channels compatible with voltage and current signals. It also adds compatibility with the high-speed addressable Remote Sensor (HART) protocol, with only one HART modem per module. Configurable current signals for the 1756-IF8H include the industry standard 0-20 mA and 4-20 mA. For voltage input signals, the supported voltages are +/-10VDC, 0-5 VDC, 1-5 VDC, and 0-10 VDC. The module has a resolution range of 16-21 bits, and the backplane current requirements are 300 mA@ 5.1VDC and 135 mA@ 24VDC. Its total backplane power consumption is 4.77 watts, while heat dissipation varies depending on the signal configured. For voltage signal processing, the heat dissipation is 11/0 BTU/hr, while for current, the heat dissipation is 13.7 BTU/hr. It has an open circuit detection time of 5 seconds and overvoltage protection of 30 VDC and 8 VDC for voltage and current signal configurations. This module is a single width module and therefore occupies a single slot in the 1756 chassis. It can be part of a local I/O or distributed I/O system. HART scan time of 1756-IF8H is 18... 488 milliseconds, 1 second if HART is enabled, and an estimated scan time of 10 seconds if all channel HART is activated. Module pass-through configurations and communication with HART communications and devices can significantly increase scan times. The 1756-IF8H uses successive approximation as the input conversion method, while the output conversion method is by R ladder DAC, monotonicity, no loss of code.

Allen-Bradley 1756-IF8H is a HART analog module belonging to the ControlLogix system. It requires a 36-bit spring-clip RTB or removable terminal housing, which can be 1756-TBCH or 1756-TBS6H, and is compatible with HART 5, 6, and 7. The module provides eight differential voltage or current inputs, one HART modem for each module. The 1756-IF8H input module receives the signal from the process value transmitter and then converts it into the corresponding measured value for use in the Logix controller. The 1756-IF8H has three data formats you can choose from with the Studio 5000 Logix Designer: Analog only, Analog and HART PV, and analog and HART by channel. If you want the members of the tag to be arranged like the members of a non-HART analog input module, you should select the analog and HART PV formats. The simulated values are grouped together near the end of the label to make it easier to see all eight simulated values at once. However, if you want to group the status, analog values, and device status of each channel into one label, you should select analog and HART by channel format. This will make it easier for you to view all the data related to your field devices.

Using this module allows you to implement emulated and HART connections in one module, and HART commands can be transmitted with 1756-IF8H as unplanned messages. Additional features of the 1756-IF8H include multiple current and voltage input ranges, real-time sampling, process alarm, line break detection, module filters, underrange and overrange detection, rate alarm, and highway addressable remote sensor (HART) communication. The 1756-IF8H has a variable operating range for each channel in the module. You can choose from a range of -10 to 10 volts, 0 to 5 volts, 0 to 10 volts, 0 to 20 MA, and 4 to 20 mA, with HART instruments using the latter range. The module has a resolution range of 16 to 21 bits. Backplane voltage and current ratings are 5.1 V DC, 300 MA, 24 V DC, and 135 MA for a total backplane power of 4.77 watts. The current has a voltage consumption of 3.21 watts and 4.01 watts, respectively, and also has a maximum overvoltage protection of 30 volts DC (voltage) and 8 volts DC (current).

1756-IF8H  具有HART功能的模拟输入模块

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