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A-B 1771-IA

Brand: Allen-Bradley

Model: 1771-IA

Describe: Input Module

Status: New/Used

The 1771-IA and 1771-IA2 input modules include input filtering to limit the effects of voltage transients caused by contact bounce and/or radiated electrical noise.

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A-B 1771-IA

1771-IA, 1771-IA2 Input Module

These modules contain input filtering to limit the effects of voltage transients caused by contact bounce and/or radiated electrical noise. The delay due to filtering is nominally 24+10ms for turning ac inputs on or off; and 10+4ms for turning dc inputs on, 20+9ms for turning dc inputs off.

The module circuit board is slotted in two places on the rear edge. The position of the keying bands on the backplane connector must correspond to these slots to allow insertion of the module. You can key any connector in an I/O chassis to receive this module except for the left–most connector reserved for adapter or processor modules. Place keying bands between the following numbers labeled on the backplane connector:

• Between 4 and 6

• Between 10 and 12

You can change the position of these keys if system redesign and rewiring makes insertion of a different module necessary.

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1771-IA、1771-IA2输入模块
这些模块包含输入滤波，以限制由触点反弹和/或辐射电噪声引起的电压瞬变的影响。打开或关闭交流输入时，滤波引起的延迟标称为24+10ms；打开直流输入为10+4ms，关闭直流输入为20+9ms。
模块电路板在后边缘的两个位置开槽。背板连接器上的键带位置必须与这些插槽相对应，以便插入模块。您可以在I/O机箱中键入任何连接器来接收此模块，但为适配器或处理器模块保留的最左侧连接器除外。在背板连接器上标记的以下数字之间放置键带：
• 介于4和6之间
• 介于10和12之间
如果系统重新设计和重新布线需要插入不同的模块，您可以更改这些键的位置。

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