Allen-Bradley 1756-PAR2 罗克韦尔冗余电源单元是一个专为关键应用设计的捆绑系统，它属于ControlLogix产品系列，旨在通过提供故障安全保护来降低应用停机的风险。以下是对该冗余电源单元的详细解析：

一、系统组成

• 核心组件：1756-PAR2由两个1756-PA75R电源、两条1756-CPR2电缆和一个1756-PSCA2机箱适配器模块组成。
• 1756-PA75R电源：作为冗余电源单元，与另一个电源冗余单元一起使用，提供故障安全保护。
• 1756-CPR2电缆：用于连接两个电源，实现同步和执行内部通信，长度为0.91米或3英尺，最小电缆弯曲半径为12.7厘米或5英寸。
• 1756-PSCA2机箱适配器：一个无源设备，用于将已安装的一对电源整合到ControlLogix机箱背板电路上的唯一电源连接器。

二、技术规格

• 输入电压：范围为85-264VAC，47-63 Hz；标称输入电压为120/240 VAC，标称输入频率为50/60 Hz。
• 输出功率：最大输出功率为75瓦。
• 电流容量：
• 1.5 @ 1.2 VDC
• 3.3伏直流电时为4安
• 5.1伏直流电时为13安
• 24伏直流电时为2.8安

三、应用场景

由于1756-PAR2提供故障安全保护，它非常适用于那些要求将应用停机风险降至最低的关键应用。这些应用可能包括工业自动化、过程控制、电力监控等领域，其中对系统稳定性和可靠性的要求极高。

四、安装与配置

• 安装：1756-PAR2的安装相对简单，通常需要将标准电源连接到框架的左端，并将其直接固定到底板上。同时，使用1756-CPR2电缆连接两个电源，并通过1756-PSCA2机箱适配器将电源整合到ControlLogix机箱背板电路上。
• 配置：用户可以根据实际需求配置电源的输出电压和电流，以满足不同应用的需求。此外，由于该冗余电源单元具有智能坚固技术，因此能够承受极端温度和恶劣环境，确保系统的稳定运行。

The Allen-Bradley 1756-PAR2 Rockwell Redundant Power Unit is a bundled system designed for critical applications and is part of the ControlLogix product family designed to reduce the risk of application downtime by providing fail-safe protection. The following is a detailed analysis of the redundant power supply unit:

1. System composition

The 1756-PAR2 consists of two 1756-PA75R power supplies, two 1756-CPR2 cables, and a 1756-PSCA2 chassis adapter module.

1756-PA75R Power Supply: As a redundant power supply unit, used with another power supply redundancy unit to provide fail-safe protection.

1756-CPR2 cable: Used to connect two power sources, synchronize and perform internal communication, 0.91 m or 3 ft in length, with a minimum cable bend radius of 12.7 cm or 5 inches.

1756-PSCA2 Chassis Adapter: A passive device used to integrate an installed pair of power supplies into the sole power connector on the ControlLogix chassis backplane circuit.

2. Technical specifications

Input voltage: range is 85-264VAC, 47-63 Hz; The nominal input voltage is 120/240 VAC and the nominal input frequency is 50/60 Hz.

Output power: The maximum output power is 75 watts.

Current capacity:

1.5@1.2VDC

4 amps at 3.3 volts DC

13 amps at 5.1 volts DC

It is 2.8 amps at 24 volts DC

3. Application scenarios

Because 1756-PAR2 provides fail-safe protection, it is ideal for critical applications where the risk of application downtime is required to be minimized. These applications may include industrial automation, process control, power monitoring, etc., where system stability and reliability are highly required.

Fourth, installation and configuration

Installation: The installation of the 1756-PAR2 is relatively simple, usually requiring a standard power supply to be connected to the left end of the frame and fixed directly to the base plate. At the same time, connect the two power supplies using the 1756-CPR2 cable and integrate the power supply into the ControlLogix chassis backplane circuit via the 1756-PSCA2 chassis adapter.

Configuration: Users can configure the output voltage and current of the power supply according to actual requirements to meet the requirements of different applications. In addition, thanks to its smart rugged technology, the redundant power unit is able to withstand extreme temperatures and harsh environments, ensuring stable operation of the system.