Allen-Bradley 1746-P2 是一款 SLC 500 模块化电源

Allen-Bradley 1746-P2 是一款 SLC 500 模块化电源

Allen-Bradley 1746-P2 是一款 SLC 500 模块化电源。它的输入电压为 85-132 或 170-265V AC，频率为 47-63 Hz。其5V时的内部电流容量为5 A，0V时为96.24 A。该电源还具有用户提供的zui大 15 A 过流保护和 20 A 的zui大浪涌电流。它具有 180 VA 的典型线路功率要求，输入端子和背板隔离为 1800V AC RMS，持续 1 秒。24V DC 时的用户电源电流容量为 200 mA，电源的用户电源电压范围（同样为 24V DC）为 18-30V DC。

每个端子zui多有两根 AWG 电线。1746-P2 电源提供保险丝保护，但仅限于防止因短路条件引起的火灾危险。它带有开放式外壳，只能安装在 1746 机箱中。整个电源尺寸为 5.5 x 2.9 x 5.7 英寸，重量为 1.1 千克或 2.5 磅。其工作温度为0-60摄氏度。

该电源模块具有一个跳线端子，用于设置要施加到设备的输入电压。

当发生欠压操作时，1746-P2 电源将在短时间内继续为 SLC 500 控制器供电。当电源继续接收低于建议工作范围的输入电压超过CPU保持时间的一段时间时，控制器将关闭。仅当电源收到推荐的工作输入电压时，它才会自动恢复运行。

对于过流情况，1746-P2 系列 A 和 B 将经历电源关断和 CPU 故障。恢复过程是重新加载用户程序。对于 1746-P2 系列 C，它将具有 24V DC 用户关断，但 CPU 继续运行，恢复过程是纠正过流情况。

1746-P2 是主要设计用于 SLC 500 自动化系统平台的电源模块。此电源安装在 SLC 机箱的zui左侧。

此电源的安装位置不包括在插槽计数中。插槽计数从插槽零 （0） 开始，该插槽保留给可编程逻辑控制器 （PLC） 处理器或 SLC 500 通信适配器。

打开电源的前盖时，电源的前面板暴露在外。该电源有五 （5） 个端子、跳线引脚和内部保险丝。这些端子设计用于适应交流线路连接和直流电源连接。一个端子用作接地端子。内部保险丝具有 1746-F2 的等效部件号更换件。跳线引脚用于设置正确的输入电压设置，无论是 100/120 VAC 还是 200 / 240 VAC。 使用电源时避免电弧。

断开或连接有源电源的电线可能会产生电弧，从而损坏电子背板。当输入电源处于非活动状态时执行操作非常重要。电源模块本身对启动高感性电气负载时可能发生的电压浪涌很敏感。为避免损坏电源模块，可以安装隔离变压器以防止电压浪涌进入电源。

该电源的保持时间为 20 ms（满载）3000 ms（空载）。此功能允许 PLC 处理器即使在电源输入电压低于标称电源电平时也能继续运行。

Allen-Bradley 1746-P2 是一款 SLC 500 模块化电源

The Allen-Bradley 1746-P2 is an SLC 500 modular power supply. It has an input voltage of 85-132 or 170-265V AC and a frequency of 47-63 Hz. Its internal current capacity is 5 A at 5V and 96.24 A at 0V. The power supply also features A user-supplied maximum overcurrent protection of 15 A and a maximum surge current of 20 A. It has a typical line power requirement of 180 VA, and the input terminal and backplane are isolated to 1800V AC RMS for 1 second. The user power supply current capacity at 24V DC is 200 mA, and the user power supply voltage range of the power supply (also 24V DC) is 18-30V DC.

Each terminal has a maximum of two AWG wires. The 1746-P2 power supply provides fuse protection, but only against fire hazards due to short circuit conditions. It comes with an open housing and can only be installed in the 1746 case. The entire power supply measures 5.5 x 2.9 x 5.7 inches and weighs 1.1 kg or 2.5 pounds. Its operating temperature is 0-60 degrees Celsius.

The power module has a jumper terminal for setting the input voltage to be applied to the device.

When undervoltage operation occurs, the 1746-P2 power supply will continue to power the SLC 500 controller for a short period of time. When the power supply continues to receive input voltage below the recommended operating range for a period of time beyond the CPU hold time, the controller will shut down. Only when the power supply receives the recommended operating input voltage will it automatically resume operation.

For overcurrent conditions, 1746-P2 Series A and B will experience power shutdowns and CPU failures. The recovery process is to reload the user program. For the 1746-P2 series C, it will have a 24V DC user shutdown, but the CPU continues to run and the recovery process is to correct the overcurrent situation.

The 1746-P2 is a power module primarily designed for the SLC 500 automation system platform. This power supply is installed on the far left side of the SLC chassis.

The installation location of this power supply is not included in the slot count. The slot count starts at slot zero (0), which is reserved for the Programmable Logic controller (PLC) processor or SLC 500 communication adapter.

When the front cover of the power supply is opened, the front panel of the power supply is exposed. The power supply has five (5) terminals, jumper pins, and internal fuses. These terminals are designed to accommodate AC line connections and DC power connections. One terminal is used as a ground terminal. The internal fuse has an equivalent part number replacement for 1746-F2. Jumper pins are used to set the correct input voltage Settings, whether 100/120 VAC or 200/240 VAC. Avoid arcing when using power.

Disconnecting or connecting a wire to an active power source can create an electric arc, which can damage the electronic backplane. It is important to perform operations when the input power is inactive. The power module itself is sensitive to voltage surges that can occur when starting a highly inductive electrical load. To avoid damage to the power module, an isolation transformer can be installed to prevent voltage surges into the power supply.

The holding time of the power supply is 20 ms (full load) 3000 ms (no load). This feature allows the PLC processor to continue operating even when the power input voltage is lower than the nominal power level.

Allen-Bradley 1746-P2 是一款 SLC 500 模块化电源

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