7022PCX

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Time Delay Relays encompass a wide range of devices designed to accomplish a variety of specific control functions. They typically provide some type of output signal when an input is received, or provide an output signal after a specific time delay has elapsed. One such delay is the 7022PCX, and this article is intended to provide an overview of the device’s application field and working principle.

The 7022PCX was designed by American company ABB and is part of their ‘Premium Series’ general industrial relays. It is a dual-delayed off delay relay with a user-adjustable time range of 0.05-300 seconds. It operates on 50/60 Hz supply, and, in its standard form, provides two N.O. (normally open) contacts that can be used to control output devices.

As a time delay relay, the 7022PCX can be used for a range of applications, including providing an adjustable time delay for remote control of equipment. It can also be used in industrial process automation to control the timing of production processes. Since it has two simultaneous delayed off outputs, it can be used to sequence two or more motors or other devices when used in combination with other programmable logic controllers (PLCs) or analog control systems. It is also suitable for providing adjustable time delay in signal systems or light-operated switching systems.

In terms of working principle, the 7022PCX has an internal timing circuit made up of RC (resistor-capacitor-based) networks which generate a very precise output voltage for controlling the delay time. When an input is received, the timer is activated and starts counting down the time delay. At the end of the delay period, a transitory is generated which causes the contacts to open. The time delay range of the unit can be adjusted over a wide range manually or via an external voltage source.

The 7022PCX also has a wide range of additional features. It is housed in a compact, dustproof and waterproof case and is provided with IP67 protection, making it ideal for outdoor use. It also has a large colour display for easy settings and monitoring, and a range of signalling options, such as LED indication, queuing lights, buzzers, and freely settable contact outputs. The relay has a wide range of settings, including a programmable input type (N.O. or N.C.), a selectable output time, and time delay accuracy of ±50ms, making it highly versatile.

In summary, the 7022PCX is a versatile and reliable dual-delayed off delay relay with a wide range of application capabilities. It features an adjustable time range of 0.05-300 seconds, IP67 protection, and a large colour display for easy settings and monitoring. It is suitable for industrial process automation and remote control of equipment and its wide range of settings makes it highly versatile.

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