ABB AO845 模拟输出模块

AO845/AO845A 模拟输出模块适用于单个或冗余应用，具有 8 个单极性模拟输出通道。该模块循环执行自我诊断。模块诊断包括：如果向输出电路供电的工艺电源过低，或者输出电流小于输出设定值和输出设定值>1 mA（开路），则报告外部通道错误（仅在有源通道上报告）。如果输出电路不能给出正确的电流值，则报告内部通道错误。在冗余对中，模块总线主站将命令模块进入错误状态。如果出现输出晶体管错误、短路、校验和错误、内部电源错误、状态链路错误、看门狗或错误的 OSP 行为，则会报告模块错误。

• 特点和优点

• 8 个通道，电流为 4...20 mA
• 适用于单个或冗余应用程序
  
• 1 组 8 个通道与地面隔离
• 模拟输入短路保护至ZP或+24 V

• HART直通通信

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• The AO845/AO845A analog output module is suitable for single or redundant applications and has 8 unipolar analog output channels. This module cycles through self diagnosis. Module diagnosis includes reporting external channel errors (only reported on active channels) if the process power supply to the output circuit is too low, or if the output current is less than the output set value and the output set value is>1 mA (open circuit). If the output circuit cannot provide the correct current value, an internal channel error is reported. In redundant alignment, the module bus master station will command the module to enter an error state. If there are output transistor errors, short circuits, checksum errors, internal power supply errors, status link errors, watchdog or incorrect OSP behavior, a module error will be reported.

• Features and advantages

• 8 channels with a current of 4... 20 mA

• Suitable for single or redundant applications

• 1 set of 8 channels isolated from the ground

• Analog input short circuit protection to ZP or+24 V

• HART Direct Communication