Programmable Timer Relays

A programmable timer relay (time switch) is a switching device that automatically turns a load on and off according to a preset program based on the time of day and the day of the week. It is used for loads that need to run at the same times every day, such as signs, shop window and exterior lighting, pool and circulation pumps, electric heaters and irrigation. The category includes Cata mechanical and digital time switches, the ACK time switch with power reserve, the Entes MCB-A analog and MCB-50 digital, and the Tense TTR-10 programmable timer relays; there are models with daily and weekly programming, DIN rail (W-Otomat) housings and a 16 A rated current. Select the model by daily or weekly program needs, the shortest switching step, the power reserve feature that keeps the clock running during a power outage, contact current and load type, and mounting style. A time switch operates by the time of day; it should not be confused with a delay relay, which counts seconds or minutes after a trigger signal.

Products

How to choose Programmable Timer Relays

A programmable timer relay (time switch) is a switching device that automatically turns a load on and off according to a preset program based on the time of day and the day of the week. It is used for loads that need to run at the same times every day, such as signs, shop window and exterior lighting, pool and circulation pumps, electric heaters and irrigation.

  • Separate sensing, motion control, logic processing and operator interface requirements.
  • Select signal type, supply voltage, communication protocol and I/O count for the machine network.
  • Verify housing size, sensing distance and PNP/NPN output polarity against the PLC input card.

Frequently asked questions

What is Programmable Timer Relays and where is it used?

A programmable timer relay (time switch) is a switching device that automatically turns a load on and off according to a preset program based on the time of day and the day of the week. It is used for loads that need to run at the same times every day, such as signs, shop window and exterior lighting, pool and circulation pumps, electric heaters and irrigation.

What should I compare when choosing Programmable Timer Relays?

Select the model by daily or weekly program needs, the shortest switching step, the power reserve feature that keeps the clock running during a power outage, contact current and load type, and mounting style.

Where can I find technical details for Programmable Timer Relays products?

A time switch operates by the time of day; it should not be confused with a delay relay, which counts seconds or minutes after a trigger signal.

Programmable Timer Relays Selection Guide: Technical Criteria & Application Standards