Some timers offers a relay output to be switched at pre-programmed intervals according to eleven different timing functions. The LED display shows the running time and the digital inputs execute start, hold and reset funstions. Dimensions: 48x48mm x 100mm (1/16 DIN).

Product Details

Input types:NPN/PNP, dry contact and voltage pulse.
Output type: 3A @ 250Vac relay or 5vdc voltage pulse.
Display: high efficiency10mm LED.
Switching power supply: 12-24Vdc/ac or 85-264Vac.
Up and down counting.
Eleven different timer modes. One mode is user defined.
Three digital inputs for special functions.
Frontal key to execute one pre-programmed special function.
Programmable time range from 0.01 second to 9999 hours.

Digital Timers
Digital timers can achieve higher precision than mechanical timers because they are quartz clocks with special electronics. Integrated circuits have made digital logic so inexpensive that an electronic digital timer is now less expensive than many mechanical and electromechanical timers. Individual timers are implemented as a simple single-chip computer system, similar to a watch. Watch technology is used in these devices.

However, most timers are now implemented in software. Modern controllers use a programmable logic controller rather than a box full of electromechanical parts. The logic is usually designed as if it were relays, using a special computer language called ladder logic. In PLCs, timers are usually simulated by the software built into the controller. Each timer is just an entry in a table maintained by the software.

Digital timers can also be used in safety device such as a Gas Timer.