Emerson KJ2231X1-EA1 SIS Relay Module
Probe end material: PPS
Probe housing material: 304 stainless steel
Probe cable and extension cable: 75 Ω three-dimensional axial
insulation
Cable armor material: 304 stainless steel
Material of front diaphragm housing: There are two types of
housing, aluminum die-casting or ABS plastic housing
Coaxial joint material: gold-plated brass or beryllium copper
The CPU module is equivalent to the human brain and heart,
constantly collecting input signals, executing user programs, and
refreshing the system's output; Memory is used to store programs
and data.
1. CPU chip
The CPU module mainly consists of a CPU chip and memory. PLC uses
the following types of CPU chips:
(1) Universal microprocessors, such as Intel's 808680186 to Pentium
series chips;
(2) Single chip microprocessor (microcontroller), such as Intel's
MCS51/96 series microcontroller;
(3) Bit chip microprocessors, such as the AMD 2900 series bit chip
microprocessors.
2. Memory
The memory of PLC is divided into system program memory and user
program memory. The system program is equivalent to the operating
system of a personal computer, which enables the PLC to have basic
intelligence and can complete various tasks specified by the PLC
designer. The system program is designed by the PLC manufacturer
and solidified in the ROM, and cannot be directly read by users.
The user program of PLC is designed by the user, which determines
the specific relationship between the input signal and output
signal of PLC. The capacity of user program memory is generally
measured in words (each word consists of 16 binary numbers), and
Mitsubishi's FX series PLC refers to the unit of user program
memory as step (i.e. word). The user program memory capacity of
small PLCs is around LK words, while the user program memory
capacity of large PLCs can reach several megabytes.
PLC commonly uses the following types of memory:
(1) Random Access Memory: (RAM)
Users can use a programmer to read out the contents of RAM or write
user programs into RAM, hence RAM is also known as read/write
memory. It is a volatile memory, and when its power is
disconnected, the stored information will be lost.
RAM has high working speed, low price, and is easy to rewrite. In
order to save user programs and certain data (such as counter
counts) in RAM after turning off the external power supply of the
PLC, a lithium battery is equipped for the RAM. Some PLCs still use
RAM to store user programs.
The lithium battery can be used for 2-5 years. When the lithium
battery needs to be replaced, the "battery voltage too low" LED on
the PLC panel will light up, and an internal flag will change to
"l" status. Its normally open contact can be used to turn on the
indicator light or sound and light alarm on the control panel,
notifying users to replace the lithium battery in a timely manner.
(2) Read Only Memory (ROM)
The content of the ROM can only be read and cannot be written. It
is non volatile and can still store stored content even after its
power is lost. ROM - A system program commonly used to store PLCs.
(3) Electrically erasable EPROM (EEPROM or E2PROM)
It is non volatile, but it can be programmed with a programmer,
combining the non volatile nature of ROM and the random access
advantages of RAM. However, the time required to write information
is much longer than RAM, and EEPROM is used to store user programs.
Some PLCs use EEPROM as the basic configuration, while others use
EEPROM as an optional option.
Terms:
We ships worldwide and accepts T/T and Paypal.
All items are subject to availability and passing our QA testing
and
inspection.
Turnaround Time:
Standard order processing is 1-2 business days plus shipping method
chosen.
Rush and off-hours service available for an additional fee.
Packaging and Handling:
Items are safely packaged in custom shipping cartons for
protection.
Shipping:
We ship worldwide use UPS,FedEx, DHL or Truck Freight when meeded.
Call to use a shipping service other than the ones listed.
International Customers are responsible for all Customs fees, VAT
and other
fees applied by their respective countries.
All shipments are fully insured.
Our advantage Products:
【Yaskawa】Servo Drive / Servo Motor
【Mitsubishi】Servo Drive / Servo Motor
【Honeywell】Module DCS / PLC
【Emerson】DeltaV Module / Servo Motor
【ABB】Input Output Module
【AB】Module / Touch Screen
【Rosemount】Pressure and Temperature Transmitter
【Yokogawa】Pressure Transmitter
【GE】IC69 Series PLC/ Fanuc Servo Motor and Drive
(Modicon,SMC,SICK,NORGREN,Siemens etc.)
Linture Technology Co,. Ltd
Contact person: Vivian
E-mail: linture0319@163.com
Cellphone: +0086-18026552038
Wechat:18026552038
WhatsApp:+86 18026552038
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