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GE HE693DAC420 PLC CPU 梯形邏輯模塊
技術(shù)規(guī)格
| 能量消耗 | 90mA @ 5VDC / 120mA @ 24VDC |
| 通道數(shù) | 4 |
| 上電時的電流浪涌 | 250mA 持續(xù) 10ms。@ 5VDC / 900mA 持續(xù) 30 毫秒。@ 24VDC |
| 需要 I/O | 4% 水 |
| 輸出范圍 | 4-20mA 或 0-20mA |
| D/A 分辨率 | 13 位加號 |
| 大線性誤差 | 0.10% 滿量程（4 至 20mA 范圍）/0.15% 滿量程（0 至 20mA 范圍） |
| 分辨率（4-20mA 模式） | 2.0uA |
| 分辨率（+/-20mA 模式） | 2.5uA |
| 用戶提供的回路電壓 | 3 - 32VDC |
| 負(fù)載阻抗 | ≤ 1.1kohms @ 24V 回路電壓 |
| 共模隔離 | 500VAC (RMS), +/- 2000VDC |
| 頻道到頻道 | 1500VAC (RMS), +/- 2000VDC |
| 工作溫度 | 0至60°C |
| 相對濕度 | 5% 至 95%，無冷凝 |
HE693DAC420 提供四個模擬輸出通道，具有 14 位分辨率和 1500VAC (RMS) 隔離通道到通道和通道到地。該模塊將 %AQ 寄存器中的數(shù)字值（0 到 +32,000）轉(zhuǎn)換為模擬電流信號。%AQ 值由 PLC CPU 中的梯形邏輯程序設(shè)置。當(dāng) PLC 退出 RUN 模式時，每個通道可以設(shè)置為“默認(rèn)為 4/0mA”或“保持狀態(tài)”。每個通道的輸出模式可設(shè)置為 4-20mA 或 0-20mA。
外殼組件也可以具有防護(hù)等級
在設(shè)計(jì)戶外雜物柜時，您需要，例如，閂鎖和鎖具，可確保您達(dá)到所需的 IP 或 NEMA 等級。
任何使用 IP65 等級系統(tǒng)的外殼都設(shè)計(jì)為防塵。該等級還可以保護(hù)其持有的設(shè)備免受來自各個方向的噴水。例如，要獲得該等級，您還需要一個等級為 IP65 的閂鎖。一個不錯的選擇是 IP65四分之一圈彈簧鎖。具體來說，您希望 O 型圈的密封性能具有 IP65 防護(hù)等級。如果空間有限，一個不錯的選擇是迷你可調(diào)節(jié)壓縮閂鎖，它也符合 IP65 標(biāo)準(zhǔn)。
如果電氣外殼門鎖或閂鎖無法按照該標(biāo)準(zhǔn)進(jìn)行密封，則您正在考慮進(jìn)水和污垢的可能性，這可能會損壞您所在的設(shè)備。
通常在美國，兩個評級都針對外殼和組件。相當(dāng)于 IP65 的是 NEMA 4x 電氣外殼。例如，同樣的四分之一圈彈簧鎖在歐洲的 IP65 等級在美國的等級為 NEMA-4 或 4x 所以它可能讀作：IP65/NEMA-4。
戶外電信設(shè)備柜或任何容納電子設(shè)備的外殼的鎖和閂鎖并不是具有 IP 或 NEMA 等級的組件。例如，IP67密封墊圈可防塵和防水，并可用作堵頭。NEMA 級可調(diào)節(jié) T 型手柄帶壓縮功能，可提供更好的防振密封。
然而，簡單的可能是您習(xí)慣使用的，盡管熟悉兩者是個好主意。
When designing an outdoor utility cabinet, you need, for example, latches and locks that can ensure you meet your desired IP or NEMA rating.
Any enclosure using the IP65 rating system is designed to be dust tight. This rating also protects the equipment it holds from water spray from all directions. To obtain that rating, you’ll need, for example, a latch rated IP65 too. A good choice would be an IP65 quarter turn spring latch. Specifically, you want the o-ring to have that IP65 protection rating for its sealing properties. If space is limited, a good choice is a mini adjustable compression latch, which also seals to IP65 standards.
If the electrical enclosure door locks or latches cannot seal to that standard, you’re looking at the possibility of water and dirt ingress, which can damage the equipment you’re housing.
Often in the States, both ratings are given to an enclosure and components. The equivalent of IP65 would be NEMA 4x electrical enclosures. For example, that same quarter turn spring latch rated IP65 in Europe is rated NEMA-4 or 4x in the U.S. So it might read as: IP65/NEMA-4.
Locks and latches for an outdoor telecom equipment cabinet or any enclosure that holds electronics, aren’t the only components that carry IP or NEMA ratings. For instance, IP67 Sealing grommets protect against dust and water and can act as blanking plugs. NEMA-rated adjustable T-handle with compression offers better sealing against vibrations.
However, the easiest might be what you’re used to working with, although it’s a good idea to become familiar with both.
