描述: Allen-Bradley 1756-IF16 是一款 ControlLogix 模块,具有十六 (16) 个单端或八 (8) 个差分或四 (4) 个差分高速模拟输入通道。该模块支持 ±10V、0-10V、0-5V 和 0-20 mA 的输入信号范围,分辨率为 320 μV/计数(15 位 + 符号双极性)@ ±10.25V;160 μV/计数(16 位)@ 0-10.25V;80 μV/计数(16 位)@ 0-5.125V 和 0.32 μA/计数(16 位)@ 0-20.5 mA。该模块与 1756-TBCH 或 1756-TBS6H 可拆卸接线端子 (RTB) 一起使用。
描述: Allen-Bradley 1756-IF16 是一款 ControlLogix 模块,具有十六 (16) 个单端或八 (8) 个差分或四 (4) 个差分高速模拟输入通道。该模块支持 ±10V、0-10V、0-5V 和 0-20 mA 的输入信号范围,分辨率为 320 μV/计数(15 位 + 符号双极性)@ ±10.25V;160 μV/计数(16 位)@ 0-10.25V;80 μV/计数(16 位)@ 0-5.125V 和 0.32 μA/计数(16 位)@ 0-20.5 mA。该模块与 1756-TBCH 或 1756-TBS6H 可拆卸接线端子 (RTB) 一起使用。
1756-IF16 的单个分辨率为 320 μV/计数(15 位 + 符号双极性)@ ±10.25V 输入范围;160 μV/计数(16 位)@ 0-10.25V 输入范围;80 μV/计数(16 位)@ 0-5.125V 输入范围和 0.32 μA/计数(16 位)@ 0-20.5 mA。该模块的扫描时间各不相同,例如单端为 16-488 毫秒;8-244 ms(差分接线)和 5-122 ms(高速差分接线)。它具有使用 Sigma-Delta 方法的内置模数转换器电路。转换后的数据按照整数模式(左对齐,2 秒补码)IEEE 32 位浮点数据格式存储。该模块的校准精度优于电压输入量程的 0.05% 和电流输入量程的 0.15%。
1756-IF16可以使用三种不同的接线方式,具体取决于用户和应用的要求,如单端接线、差分接线和高速模式差分接线。
当所有输入设备都连接到公共接地时,单端接线方法最好。
这是为了将信号输入的一侧与信号地进行比较以获得差值,然后由模块用于为控制器生成数字数据。
当应用没有公共接地或可能有单独的信号对时,建议使用差分接线方法。
这种布线方法也适用于需要提高噪声抗扰度的环境。差分模式中的通道彼此不完全隔离。
如果多个差分输入信号具有不同的电压公共参考,则一个通道可能影响另一个通道的读取。
当发生这种情况时,用户应将输入连接到不同的模块上,或用隔离的输入模块替换非隔离的模块。
Description: Allen-Bradley 1756-IF16 is a ControlLogix module with sixteen (16) single-ended or eight (8) differential or four (4) differential high-speed analog input channels. The module supports input signal ranges of ±10V, 0-10V, 0-5V, and 0-20 mA with a resolution of 320 μV/ count (15-bit + sign bipolar) @ ±10.25V; 160 μV/ Count (16 bits) @ 0-10.25V; 80 μV/ Count (16 bits) @ 0-5.125V and 0.32 μA/ count (16 bits) @ 0-20.5 mA. The module is used with the 1756-TBCH or 1756-TBS6H detachable terminal (RTB).
The 1756-IF16 has a single resolution of 320 μV/ count (15-bit + sign bipolar) @ ±10.25V input range; 160 μV/ Count (16 bits) @ 0-10.25V input range; 80 μV/ Count (16-bit) @ 0-5.125V Input range and 0.32 μA/ count (16-bit) @ 0-20.5 mA. The scanning time of the module varies, for example 16-488 milliseconds for a single end; 8-244 ms (differential connection) and 5-122 ms (high-speed differential connection). It has a built-in analog-to-digital converter circuit using the Sigma-Delta method. The converted data is stored in integer mode (left-justified, 2-second complement) IEEE 32-bit floating-point data format. The module's calibration accuracy is better than 0.05% of the voltage input range and 0.15% of the current input range.
The 1756-IF16 can use three different wiring modes, depending on the requirements of the user and application, such as single-ended wiring, differential wiring, and high-speed differential wiring.
Single-ended wiring is best when all input devices are connected to common ground.
This is to compare the side of the signal input with the signal ground to obtain the difference, which is then used by the module to generate digital data for the controller.
Differential wiring methods are recommended when applications have no common ground or may have separate signal pairs.
This wiring method is also suitable for environments where noise immunity needs to be improved. Channels in differential mode are not completely isolated from each other.
If multiple differential input signals have different voltage common references, one channel may affect the reading of the other.
When this happens, the user should connect the input to a different module or replace a non-isolated module with an isolated input module.
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