EMERSON 38B5786X132

Description

38B5786X132

PNEUMATIC RELAY

FIELDVUE DVC6000

STANDARD BLEED

SINGLE ACTING

DIRECT

Memory is mainly used to store system programs, user programs and working data. The memory for storing system software is called system program memory; The memory for storing application software is called user program memory; The memory storing working data is called data memory. Commonly used memory includes RAM, EPROM and EEPROM. RAM is a random access memory that can be read and written to store user programs and generate user data areas. User programs stored in RAM can be easily modified. RAM memory is a kind of semiconductor memory with high density, low power consumption and low price. Lithium battery can be used as standby power supply. In case of power failure, the stored information can be effectively maintained. EPROM and EEPROM are read-only memory. Use these types of memory to solidify the system management program and application program.

Input/output unit (I/O unit)

I/O unit is actually the interface part that transmits input and output signals between PLC and controlled object. I/O unit has good electrical isolation and filtering function. The input devices connected to the PLC input interface are various switches, buttons, sensors, etc. The output controllers of PLC are often solenoid valves, contactors and relays, while the relays are AC and DC type, high voltage type and low voltage type, voltage type and current type.

Power Supply

The PLC power supply unit includes the system power supply and backup battery. The function of the power supply unit is to convert the external power supply into the internal working voltage. There is a regulated power supply in the PLC to supply power to the CPU unit and I/O unit of the PLC.

The programmer

Programmer is the most important peripheral equipment of PLC. Use the programmer to send the user program into the memory of the PLC. You can also use the programmer to check the program, modify the program, and monitor the working status of the PLC. In addition, add appropriate hardware interfaces and software packages on the personal computer, that is, the PLC can be programmed by the personal computer. The ladder diagram can be directly compiled and displayed by using a microcomputer as a programmer.