489-P1-LO-A20 是 GE Multilin 制造的 Multilin 489 发电机管理继电器。该发电机继电器具有 1 个 A 相 CT 次级。LO 控制电源为 20-60 VDC 和 20-48 VAC，频率为 48-62 Hz。该继电器上的模拟输出为 4 至 20 mA。该继电器有一个基本显示。该发电机管理继电器没有保护性保形涂层来防止化学环境。LO 代表 GE Multilin 发电机管理继电器部件号 489-P1-LO-A20 中的低控制功率。GE Multilin 发电机管理继电器的低控制电源包括 20 至 60 V DC；20 至 48 V AC，48 至 62 Hz。
SR489-P1-LO-A20-E
489-P1-LO-A20-E 是 Multiline 的 489 发电机管理继电器。本机具有 1A 相 CT 输入，控制电压为 20 至 60VDC 或 20 至 48 VAC @ 48-62 Hz。该装置具有大型LCD增强型显示屏和4-20 mA模拟输入。作为GE的SR系列继电器的一部分，489-P1-LO-A20-E提供经济高效的保护和控制，并配有先进的通信功能。该装置设计用于与中小型发电机配对，以提供保护并减少故障排除时间。该装置易于使用，并提供用于振动监控的模拟输入以及用于轴承热保护的 RTD。
SR489-P1-LO-A20-E
489-P1-LO-A20 is a Multilin 489 generator management relay manufactured by GE Multilin. The generator relay has one A-phase CT secondary. The LO control power supply is 20-60 VDC and 20-48 VAC, with a frequency of 48-62 Hz. The analog output on this relay is 4 to 20 mA. This relay has a basic display. The generator management relay does not have a protective conformal coating to prevent chemical environments. LO represents the low control power in the GE Multilin generator management relay part number 489-P1-LO-A20. The low control power supply for the GE Multilin generator management relay includes 20 to 60 V DC; 20 to 48 V AC, 48 to 62 Hz
SR489-P1-LO-A20-E
489-P1-LO-A20-E is Multiline’s 489 generator management relay. This machine has a 1A phase CT input and a control voltage of 20 to 60VDC or 20 to 48 VAC @ 48 to 62 Hz. This device has a large LCD enhanced display screen and 4-20 mA analog input. As part of GE’s SR series relays, the 489-P1-LO-A20-E provides cost-effective protection and control, and is equipped with advanced communication functions. This device is designed to pair with small and medium-sized generators to provide protection and reduce troubleshooting time. This device is easy to use and provides analog inputs for vibration monitoring as well as RTDs for bearing thermal protection.
SR489-P1-LO-A20-E
PLC控制器本身的硬件采用积木式结构，各厂家产品结构大同小异。以日本欧姆龙C200HE为例，为总线模板框式结构，基本框架(CPU母板)上装有CPU模板，其它槽位装有I/O模板;如果I/O模板多时，可由CPU母板经I/O扩展电缆连接I/O扩展母板，在其上装I/O模板;另一种方法是配备远程I/O从站等。这些都说明了PLC厂家将硬件各部件均向用户开发，便于用户选用，配置成规模不等的PLC，而且这种硬件配置的开放性，为制造商、分销商(代理商)、系统集成商、最终用户带来很多方便，为营销供应链带来很大便利，这是一大成功经验。
SR489-P1-LO-A20-E
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