IS215UCVEH2AB modular

Description

Part Number: IS215UCVEH2AB

SKU: IS215UCVEH2ABGBTC

Manufacturer: GE Boards & Turbine Control

Series: Mark VI IS200

In terms of the working mode, in the relay control circuit, when the power is turned on, all the relays in the circuit are in a restricted state, that is, the pulled in relays are pulled in at the same time, and the relay that should not be pulled in cannot be pulled in due to certain conditions. This working mode is called parallel working mode. The user program of PLC is executed cyclically in a certain order, so each soft relay is in the process of periodic cyclic scanning, and the action sequence of each relay subject to the same condition is determined by the program scanning sequence, which is called serial working mode.

From the perspective of control speed, the relay control system relies on the action of mechanical contacts to achieve control. With low operating frequency, the mechanical contacts will also jitter. However, PLC controls semiconductor circuit through program command, which is fast, with program command execution time at microsecond level, and no contact jitter problem

From the perspective of timing and counting control, the electrical control system uses the time delay action of the time relay for time control. The time delay of the time relay is vulnerable to the impact of environmental temperature and temperature changes, and the timing accuracy is not high. The PLC uses semiconductor integrated circuit as the timer, and the clock pulse is generated by the crystal oscillator, with high precision and wide timing range. The user can set the timing value in the program as required, which is easy to modify and is not affected by the environment. Moreover, the PLC has the counting function, while the electrical control system generally does not have the counting function.

From the perspective of reliability and maintainability, the electrical control system uses a large number of mechanical contacts, which have mechanical wear, arc burns, short life, and many system connections, so the reliability and maintainability are poor. While a large number of PLC switch actions are completed by contactless semiconductor circuits, which have a long life and high reliability. PLC also has a self diagnostic function, which can find out its own faults, display them to the operator at any time, and dynamically monitor the implementation of the control program, providing convenience for on-site debugging and maintenance.

IS215UCVEH2AB