INDUSTRIAL CONTROL & SENSING DEVICES

Measuring and monitoring relays: Voltage, Current, Asymmetry, Phase sequence, Frequency and Special funnctions

This versatile count up or count down predetermining counter/timer with prescaler has a wide range of innovative and attractive features. Designed with imagination and built to the highest standards it offers both counting and timing functions in one unit. Simple programming via menu driven display High visibility supertwist LCD display can be viewed from any angle Backlight programmable ON, OFF or AUTO Programmable decimal point up to 3 places Operates from 85-265VAC or 10-26VDC 12VDC output to drive a sensor (when AC powered) Opto-isolated inputs Wide range of prescaling Output relay contacts rated at 5A Output can be set to latch or pulse with programmable pulse duration Environmental protection to IP65 Standard DIN housing CE, UL and cUL approved

As the name implies, a temperature controller - often called a PID controller is an instrument used to control temperature. The temperature controller takes an input from a temperature sensor and has an output that is connected to a control element such as a heater or fan. To accurately control process temperature without extensive operator involvement, a temperature control system relies upon a controller, which accepts a temperature sensor such as a thermocouple or RTD as input. It compares the actual temperature to the desired control temperature, or setpoint, and provides an output to a control element.

A photoelectric sensor emits a light beam (visible or infrared) from its light-emitting element.A reflective-type photoelectric sensor is used to detect the light beam reflected from the target.A thrubeam type sensor is used to measure the change in light quantity caused by the target crossing the optical axis.

A proximity sensor is an electronic sensor capable of detecting the presence of nearby objects without physical contact. It emits an electromagnetic field or a beam of electromagnetic radiation (for example: infrared) and then looks for changes in the return signal or field. The object that is being sensed is the proximity sensor's target. Depending on the proximity sensor targets, different sensors may be used. For example, an inductive proximity sensor requires a metal target, whereas a capacitive photoelectric sensor may be suitable for a plastic target. Proximity sensors have a long functional life and high reliability due to the absence of mechanical parts and the lack of physical contact between the sensor and the target. A proximity sensor that is adjusted to a very short range can often be used as a touch switch.

An Encoder is a combinational circuit that performs the reverse operation of Decoder. It has maximum of 2n input lines and ‘n’ output lines. It will produce a binary code equivalent to the input, which is active High. Therefore, the encoder encodes 2n input lines with ‘n’ bits. It is optional to represent the enable signal in encoders.