1756-PA72/C 标准电源 用于向1756 ControlLogix机箱的背板供电

Allen-Bradley 1756-PA72是一种标准电源，主要用于向1756 ControlLogix机箱的背板供电，使连接到机箱的每个模块都能运行。1756-PA72的设计允许输入电压范围为85-265 VAC，频率范围为47-63 Hz。它在0-60°C(+32…+140°F)时输出功率为75 W，电流容量为3.3VDC的4A；5.1伏直流电时为10安，24伏直流电时为2.8安。

1756-PA72在85伏交流电压、50/60赫兹时的保持时间为5个周期；120伏交流电压，50/60赫兹时6个周期；200伏交流电时6个周期，50/60赫兹；240伏交流电时6个周期，50/60赫兹。保持时间是指电源对输入电压移除和DC电源故障的反应。

1756-PA72安装在机箱的最左侧。它在机箱外部有一个专用的插槽分配，并且不占用ControlLogix插槽。它可以安装在不同的ControlLogix机箱中，如1756-A4、1756-A7、1756-A10、1756-A13和1756-A17，无论是A、B和c系列。此电源重约0.95千克(2.10磅)，物理尺寸为14.0 x 11.2 x 14.5厘米(5.51 x 4.41 x 5.71英寸)。).该模块以及ControlLogix机箱有一个开放式外壳，因此需要安装在外壳内，以保护硬件免受工业污染物和干扰。1756-PA72不可用于冗余电源应用，但也可用于分布式I/O架构。

1756-PA72在0至60摄氏度(32至140华氏度)下的功耗为25瓦。该电源的功耗为85.3 BTU/小时，最大浪涌电流为20 a。Allen-Bradley 1756-PA72提供内置过流保护。它由用户提供，最大电流为15安。该电源的最大变压器负载为100伏安，电压隔离为250伏连续电压。1756-PA72也有一个强化绝缘类型，在3500伏DC下测试60秒。艾伦-布拉德利1756-PA72是开放式设备。该电源应安装在为特定环境条件设计的适当外壳中。只有使用工具才能接触到外壳内部。请参阅NEMA标准250和IEC 60529出版物中的用户手册，了解不同类型外壳的防护等级。

1756-PA7

The Allen-Bradley 1756-PA72 is a Standard Power Supply that is mainly used to deliver power to the backplane of a 1756 ControlLogix chassis, enabling each of module attached to the chassis to operate. The 1756-PA72 is designed to accept an input voltage range of 85-265 VAC with frequency range of 47-63 Hz. It delivers an output power of 75 W @ 0-60 °C (+32…+140 °F) with Current capacities of 4A at 3.3VDC; 10 A at 5.1VDC and 2.8 A at 24VDC.

The 1756-PA72 has a hold-up time of 5 cycles @ 85VAC, 50/60 Hz; 6 cycles @ 120VAC, 50/60 Hz; 6 cycles @ 200VAC, 50/60 Hz and 6 cycles @ 240V AC, 50/60 Hz. Hold-up time refers to the power supply’s reaction from the removal of the input voltage and DC power failure.

The 1756-PA72 is installed at the left most location of the chassis. It has a dedicated slot assignment, outside the chassis and does not occupy a ControlLogix slot. It may be installed in different ControlLogix chassis such as 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17, whether Series A, B and C. This power supply weighs approximately 0.95 kg (2.10 lb) with physical dimensions of 14.0 x 11.2 x 14.5 cm (5.51 x 4.41 x 5.71 in.). This module, along the ControlLogix chassis has an open-type enclosure, therefore, requires installation inside an enclosure that protects the hardware from industrial contaminants and interferences. The 1756-PA72 may not be used is redundant power supply applications however, it may also be used in Distributed I/O architecture.

The 1756-PA72 has a power consumption of 25 Watts at 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit). This power supply has a power dissipation of 85.3 BTU/hour and a power supply with a maximum inrush current of 20 A. The Allen-Bradley 1756-PA72 provides built-in overcurrent protection. It is user-supplied at a maximum of 15 A. The maximum transformer load of this power supply is 100VA and the voltage isolation is 250 Volts continuous. The 1756-PA72 also has a reinforced insulation type tested at 3500 Volts DC for 60 seconds. The Allen-Bradley 1756-PA72 is open type equipment. This power supply should be installed in an appropriate enclosure that is designed for certain environmental conditions. The inside of the enclosure should be accessible only with a tool. Please see the user manual from the NEMA Standard 250 and IEC 60529 publications for an explanation of the level of protection afforded by different types of enclosures.