ABB PFEA111-20是一种电源模块，被广泛应用于工控备件和DCS系统。

这种电源模块的电压输出范围从220V±3%到110V±3%，其频率为50HZ/60HZ。这种电源模块是单相TND(SVC)系列高精度自动稳压电源组合而成，采用的是三相分相调节，保证各相电压的稳定与安全。其输出可用三相四线制或三相三线制，并由三只电流表分别指示各相的输出电流，一只转换开关和一只电压表换档检测各相输出线电压。

ABB PFTL 101B 2.0KN电源模块采用高速16位A/D转换器，使得测量数据稳定，重复性好。其自动程控电流源技术，使得电流源共设1000个电流档位，由内部微控制器根据被测电阻自动控制，达到比较宽的测量范围。这种电源模块的高度智能化设计，使其具有多种先进的功能，例如自动判断测试线虚接、断线等故障，并具有保护功能，能可靠保护反电势对仪器的冲击，且具有自动放电指示功能。

此外，ABB PFTL 101B 2.0KN电源模块还可以显示测量电流和测量时间，其智能化功率管理技术，能有效减轻仪器内部发热。同时，这种电源模块还可以储存120次测量数据，掉电不丢失。

ABB PFTL 101B 2.0KN is a power module widely used in industrial control spare parts and DCS systems.

The voltage output range of this power module ranges from 220V ± 3% to 110V ± 3%, with a frequency of 50HZ/60HZ. This power module is a combination of single-phase TND (SVC) series high-precision automatic voltage stabilizing power supplies, using three-phase split phase regulation to ensure the stability and safety of each phase voltage. Its output can be in the three-phase four wire system or three-phase three wire system, and three ammeters are used to indicate the output current of each phase. A conversion switch and a voltmeter are used to shift gears to detect the output line voltage of each phase.

The ABB PFTL 101B 2.0KN power module adopts a high-speed 16 bit A/D converter, which ensures stable measurement data and good repeatability. Its automatic programmable current source technology allows the current source to have a total of 1000 current levels, which are automatically controlled by an internal microcontroller based on the measured resistance, achieving a relatively wide measurement range. The highly intelligent design of this power module enables it to have various advanced functions, such as automatically judging faults such as virtual connection and disconnection of test lines, and has protection functions, which can reliably protect the impact of back electromotive force on the instrument, and has automatic discharge indication function.

In addition, the ABB PFTL 101B 2.0KN power module can also display the measured current and measurement time, and its intelligent power management technology can effectively reduce the internal heating of the instrument. At the same time, this power module can also store 120 measurement data without losing power.