DCS控制卡件GFD233A 3BHE022294R0101仪器资讯
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吞吐量示例在八通道模块上，2个通道低于范围。分配的所有寄存器至模块的数据将每1150毫秒更新一次，直到输入超出范围
通道返回有效范围。当他们这样做时，更新间隔将返回到710毫秒。
更新间隔=（400或710）+（超出范围通道X 220）
使用上面的示例：（710）+（2 X 220）=1150毫秒
如果一个通道返回到有效范围，更新间隔将减少到930毫秒。
注：只要通道超出范围，分配给它的寄存器将数据为0000（4095升高），低于范围，或4096（8192升高），高于范围范围（参考第107页的数据值参考表）
*更新间隔是更新所有分配给模块的寄存器。注：任何模块运行时诊断故障都将导致0000值为返回到控制器，而不管选择的范围如何用户连接到标准螺钉端子排和硬接线系统允许在不干扰接线的情况下插入或移除模块。下表显示了每个输入范围可接受的五个输入范围组模块将接受高于其指定值2%的输入FSR范围，但不会进入超范围条件，但不会低于范围。为了确定输入的负载和保护注意事项励磁电路，下图是输入电路前部的示意图
终止注意连接到电流输入端子的内置250Ω电阻器。什么时候电流检测端子外部跨接至正极输入端子，无论电压范围如何，该输入都可能有电流输入挑选出来的。
注：电流检测功能是专门为4-20 mA提供的电流回路应用（1-5 V输入范围）。然而，电流模式是可操作的在所有范围内。
B875–102高速模拟输入，输入电路前端。
Throughput Rate Example
On an eight channel module, 2 channels are under range. All the registers assigned
to the module will be updated every 1150 ms, until the inputs on the out of range
channels return to the valid range. When they do, the update interval will return to
710 ms.
Update Interval =
(400 or 710) + (Out of Range Channels X 220)
Using the example above:
(710) + (2 X 220) = 1150 ms
If one channel returned to the valid range, the update interval would reduce to
930 ms.
NOTE: As long as the channel is out of range, the register assigned to it will either
have data of 0000 (4095 Elevated), under range, or 4096 (8192 Elevated), over
range. (Refer to Data Value Reference Chart, page 107)
* The Update Interval is the amount of time necessary to update the data for all the
registers assigned to the module.
NOTE: Any module run-time diagnostic failure will result in a 0000 value being
returned to the controller, regardless of selected range.s
User connections are made to a standard screw terminal strip, and the rigid wiring
system permits module insertion or removal without disturbing the wiring. The following table shows the five input ranges acceptable to each input range
group. The module will accept an input as much as 2% FSR above its specified
range without going into an over-range condition, but nothing below range.For purposes of determining load and protection considerations for the inputting of
field circuits, The following figure is a schematic diagram of the input circuit’s front
end. Note the built-in 250 Ω resistor connected to the current input terminal. When
the current sense terminal is externally jumpered to the positive input terminal,
current input becomes possible for that input regardless of the voltage range
selected.
NOTE: The current sense function has been provided specifically for the 4—20 mA
current loop applications (1—5 V input range). However, current mode is operable
on all ranges.
B875–102 High Speed Analog Input, Input Circuit Front End.
