(1)The programmable controller has three forms:relay output,thyristor output and transistor output.
(2)The output terminal wiring is divided into independent output and common output.When the output relay or thyristor of the PLC is activated,the two output terminals of the same number are connected.In different groups,different types and voltage classes of output voltages can be used.But the outputs in the same group can only use the same type of power supply with the same voltage level.
(3)Since the output components of the PLC are packaged on the printed circuit board and connected to the terminal board,if the load connected to the output components is short-circuited,the printed circuit board will be burned.Therefore,fuses are used to protect the output components.
(4)When using the relay output,the size of the inductive load it bears affects the working life of the relay,so the working life of the relay is required to be long.
(5)The output load of PLC may generate noise interference,so measures should be taken to control it.
In addition,for the dangerous load that can cause injury to the user,in addition to considering it in the control program,an external emergency stop circuit should be designed so that when the programmable controller fails,the power supply of the load that causes the injury can be cut off.
(1)可编程控制器有继电器输出、晶闸管输出、晶体管输出3种形式。
(2)输出端接线分为独立输出和公共输出。当PLC的输出继电器或晶闸管动作时,同一号码的两个输出端接通。在不同组中,可采用不同类型和电压等级的输出电压。但在同一组中的输出只能用同一类型、同一电压等级的电源。
(3)由于PLC的输出元件被封装在印制电路板上,并且连接至端子板,若将连接输出元件的负载短路,将烧毁印制电路板,因此,应用熔丝保护输出元件。
(4)采用继电器输出时,承受的电感性负载大小影响到继电器的工作寿命,因此继电器工作寿命要求长。
(5)PLC的输出负载可能产生噪声干扰,因此要采取措施加以控制。
此外,对于能使用户造成伤害的危险负载,除了在控制程序中加以考虑之外,还应设计外部紧急停车电路,使得可编程控制器发生故障时,能将引起伤害的负载电源切断。
Sorensen DCS40-75 DC Power Supply
Sorensen DCR150-2.5A
SORENSEN XANTREX DCS80-37 DCS 80V DC POWER SUPPLY GPIB
SORENSEN DCS40-75 DC PROGRAMMABLE POWER SUPPLY DCS4075
SORENSEN DCR150-12B2M2M33 USPP DCR15012B2M2M33
SORENSEN DCR150-12M35 USPP DCR15012M35