GE HE693DAC420 PLC CPU 梯形逻辑模块
技术规格
能量消耗 | 90mA @ 5VDC / 120mA @ 24VDC |
通道数 | 4 |
上电时的电流浪涌 | 250mA 持续 10ms。@ 5VDC / 900mA 持续 30 毫秒。@ 24VDC |
需要 I/O | 4% 水 |
输出范围 | 4-20mA 或 0-20mA |
D/A 分辨率 | 13 位加号 |
大线性误差 | 0.10% 满量程(4 至 20mA 范围)/0.15% 满量程(0 至 20mA 范围) |
分辨率(4-20mA 模式) | 2.0uA |
分辨率(+/-20mA 模式) | 2.5uA |
用户提供的回路电压 | 3 - 32VDC |
负载阻抗 | ≤ 1.1kohms @ 24V 回路电压 |
共模隔离 | 500VAC (RMS), +/- 2000VDC |
频道到频道 | 1500VAC (RMS), +/- 2000VDC |
工作温度 | 0至60°C |
相对湿度 | 5% 至 95%,无冷凝 |
HE693DAC420 提供四个模拟输出通道,具有 14 位分辨率和 1500VAC (RMS) 隔离通道到通道和通道到地。该模块将 %AQ 寄存器中的数字值(0 到 +32,000)转换为模拟电流信号。%AQ 值由 PLC CPU 中的梯形逻辑程序设置。当 PLC 退出 RUN 模式时,每个通道可以设置为“默认为 4/0mA”或“保持状态”。每个通道的输出模式可设置为 4-20mA 或 0-20mA。 外壳组件也可以具有防护等级
在设计户外杂物柜时,您需要,例如,闩锁和锁具,可确保您达到所需的 IP 或 NEMA 等级。
任何使用 IP65 等级系统的外壳都设计为防尘。该等级还可以保护其持有的设备免受来自各个方向的喷水。例如,要获得该等级,您还需要一个等级为 IP65 的闩锁。一个不错的选择是 IP65四分之一圈弹簧锁。具体来说,您希望 O 型圈的密封性能具有 IP65 防护等级。如果空间有限,一个不错的选择是迷你可调节压缩闩锁,它也符合 IP65 标准。
如果电气外壳门锁或闩锁无法按照该标准进行密封,则您正在考虑进水和污垢的可能性,这可能会损坏您所在的设备。
通常在美国,两个评级都针对外壳和组件。相当于 IP65 的是 NEMA 4x 电气外壳。例如,同样的四分之一圈弹簧锁在欧洲的 IP65 等级在美国的等级为 NEMA-4 或 4x 所以它可能读作:IP65/NEMA-4。
户外电信设备柜或任何容纳电子设备的外壳的锁和闩锁并不是具有 IP 或 NEMA 等级的组件。例如,IP67密封垫圈可防尘和防水,并可用作堵头。NEMA 级可调节 T 型手柄带压缩功能,可提供更好的防振密封。
然而,简单的可能是您习惯使用的,尽管熟悉两者是个好主意。
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.