| 詳細參數(shù) | |||
|---|---|---|---|
| 品牌 | AB(Allen-Bradley) | 型號 | 1756-IF16/A |
| 結構形式 | 模塊式 | 安裝方式 | 控制室安裝 |
| LD指令處理器 | 硬PLC | I/O點數(shù) | 16 |
| 功能 | I/O模塊 | 工作電壓 | 360-480AC伏特 |
| 輸出頻率 | 136千瓦 | 產(chǎn)品認證 | CE |
| 環(huán)境溫度 | 0°Cto,60°C | 環(huán)境濕度 | 95%,非冷凝 |
| 加工定制 | 否 | ||
A-B 1756-IF16/A I/O 模塊，模擬輸入，16 通道
制造商： Allen-Bradley / 羅克韋爾自動化
描述： Allen-Bradley 1756-IF16 ControlLogix 16 電流/電壓模擬輸入，A 系列
Most loop designs ground the loop at the power supply as a noise reduction measure. These considerations strongly suggest that any loop design be thoroughly analyzed to avoid designing in problems that are only realized when trying to get the system up and running.
One way to troubleshoot a loop is to identify what the loop is doing, instead of what it is not doing. For instance, if you can say that the loop current is within the specification, then you can say that the power supply and transmitter are probably fine.
One problem that is perplexing is that the loop operates fine, until if gets to a certain level and then it doesn’t operate properly. This is usually caused by too many devices on the loop. Each of the devices in the loop will have some listed power requirement or loop burden.For instance, a transducer might require a minimum of 14V, a loop powered display 5V, a signal isolator 7V, and a controller might have a 20 Ohm b. Using Ohm’s law, that 20 Ohm b becomes 0.02A * 20 Ohms = 0.4V.
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