RI-tech s.r.o. > Products > Railway > Rolling stock > Railway relays > Timer relays

Timer relays

A Timer Relay is a combination of an electromechanical output relay and a control circuit. The contacts will open or close before or after a pre-selected, timed interval.

Time delay relays are initiated or triggered by one of two methods:

  • application of input voltage/auxiliary supply will either initiate the unit or make it ready to initiate when a trigger signal is applied
  • applying a trigger signal is used to initiate the unit after input voltage has been applied. This trigger signal can either be a control switch (dry contact switch) or a power trigger (voltage).

 

Available Timer Relay Types:

Delay-on

3-Delay-On

When the relay is activated there is a delay on pull-in.

One-Shot (falling edge)

5-One-Shot falling edge

Upon application of input voltage, the time delay relay is ready to accept a trigger. When the trigger is applied, the output remains de-energized. Upon removal of the trigger, the output is energized and the time delay (t) begins. At the end of the time delay (t), the output is de-energized.

 Delay-on & Delay-off

2-Delay-On and Delay-Off

The relay needs an auxiliary supply and can be activated with an external N/O contact or with a DC voltage. When the relay is activated there is a delay on pull-in. When the relay is not energized anymore there is a delay on drop-out

Delay-off

1-delay-off

When the relay is not energized anymore there is a delay on drop-out, without any auxiliary power supply.

 Two-Shots (rising edge & falling edge

6-Two-Shots - rising edge & falling edge

Upon application of input voltage, the relay is ready to accept trigger signal. Upon application of the trigger signal (rising edge), the relay contacts transfer and the preset time T begins. During time-out, the trigger signal is ignored. The relay resets by applying the trigger switch (falling edge) when the relay is not energized.

Flashing

4-Flashing

Upon application of input voltage, the time delay begins (T). At the end of the time delay, the output is energized and remains in that condition for the same time delay (T). At the end of this time delay, the output is de-energized and remains in that condition for the time delay T. At the end of the time delay , the output is energized and the sequence repeats until input voltage is removed.

  • NTBBOR 400 relay – Delay-on drop-out, 4 C/O

     The NTBBOR 400 is a delay-on drop-out with negative command relay with 4 double make / double break C/O contacts (form Z). The delay is fully programmable with a dip switch from 0.25 s to 63.75 min. The access to dip switch is available by removing time delay cover. This feature prohibits frivolous field time delay setting. The plug-in design offers secure locking feature for maximum ease of maintenance (no…

  • TBAA 400 relay – Delay-on pull-in, 4 C/O

     The TBAA 400 is a delay-on pull-in relay with 4 double make / double break C/O contacts (form Z). The time delay is less than 10 s and fixed. The plug-in design offers secure locking feature for maximum ease of maintenance (no wires need to be disconnected or other hardware removed for relay inspection or replacement). The resistance to impact and vibration is conform to standards in force for Railway…

  • TBAR 400 relay – Delay-on drop-out, 4 C/O

     The TBAR 400 is a delay-on drop-out relay with 4 double make / double break C/O contacts (form Z). The time delay is less than 10 s and fixed. The plug-in design offers secure locking feature for maximum ease of maintenance (no wires need to be disconnected or other hardware removed for relay inspection or replacement). The resistance to impact and vibration is conform to standards in force for Railway…

  • TBAU 400 relay – Delay-on pull-in or drop-out, 4 C/O

     The TBAU 400 is a delay-on pull-in or drop-out relay with 4 double make / double break C/O contacts (form Z). The delay is fully programmable with a dip switch) from 0.25 s to 63 min. The access to dip switch is available by removing time delay cover. This feature prohibits frivolous field time delay setting. The plug-in design offers secure locking feature for maximum ease of maintenance (no wires…

  • TBBAO 400 relay – Delay on pull-in, 4 C/O

     The TBBAO 400 is a delay on pull-in relay with 4 double make / double break C/O contacts (form Z). The delay is fully programmable with a dip switch) from 0.25 s to 63 min. The access to dip switch is available by removing time delay cover. This feature prohibits frivolous field time delay setting. The plug-in design offers secure locking feature for maximum ease of maintenance (no wires need…

  • TBBOR 400 relay – Delay-on drop-out, 4 C/O

     The TBBOR 400 is a delay-on drop-out relay with 4 double make / double break C/O contacts (form Z). The delay is fully programmable with a dip switch) from 0.25 s to 63 min. The access to dip switch is available by removing time delay cover. This feature prohibits frivolous field time delay setting. The plug-in design offers secure locking feature for maximum ease of maintenance (no wires need to…

  • TBBU 400 relay – Delay-on pull-in or drop-out, 4 C/O

     The TBBU 400 is a delay-on pull-in or drop-out relay with 4 double make / double break C/O contacts (form Z). The delay is fully programmable with a dip switch) from 0.25 s to 63 min. The access to dip switch is available by removing time delay cover. This feature prohibits frivolous field time delay setting. Timing can be also be factory set on order. The plug-in design offers secure…

  • TBLAU 400 relay – Delay-on pull-in or drop-out, 4 C/O

     The TBLAU 400 is a delay-on pull-in or drop-out relay with 4 double make / double break C/O contacts (form Z). The delay is fully programmable with a dip switch from 0.25 hours to 255 hours. The access to dip switch is available by removing time delay cover. This feature prohibits frivolous field time delay setting. The plug-in design offers secure locking feature for maximum ease of maintenance (no wires…

  • TBLBU 400 relay – Delay-on pull-in or drop-out, 4 C/O

     The TBLBU 400 is a delay-on pull-in or drop-out relay with 4 double make / double break C/O contacts (form Z). The delay is fully programmable with a dip switch) from 0.25 hours to 255 hours. The access to dip switch is a vailable by removing time delay cover. This feature prohibits frivolous field time delay setting. The plug-in design offers secure locking feature for maximum ease of maintenance (no…

  • TBSBAO 400 relay – Delay-on pull-in, 4 C/O

     The TBSBAO 400 is a delay-on pull-in relay with 4 double make / double break C/O contacts (form Z). The delay is fully programmable with a dip switch) from 50 ms to1.023 s. The access to dip switch is available by removing time delay cover. This feature prohibits frivolous field time delay setting. The plug-in design offers secure locking feature for maximum ease of maintenance (no wires need to be…

  • TDB2-U200 relay – Timer, delay-on, 2 pole

     Plug-in electronic railway timer relay with two change-over contacts. When the relay is activated there is a delay on pull-in. The delay time is adjustable with a lockable knob. The relay can also be supplied with a fixed time delay (no knob). The construction of the relay and choice of materials makes the TDB2-U200 relay suitable to withstand low and high temperatures, shock & vibrating and dry to humid environments.…

  • TDB4-U200N relay – Timer, delay-on, 4 pole

     Plug-in electronic railway timer relay with four change-over contacts for reliable switching of very low currents (1 mA @ 5 VDC) up to currents of 10A @ 110VDC. When the relay is activated there is a delay on pull-in. The delay time is adjustable with a lockable knob. The relay can also be supplied with a fixed time delay (no knob). The relay is equipped with two LEDs which indicate…

  • TDBE4-U200N relay – Delay-on & delay-off, 4 pole

     Plug-in electronic railway timer relay with three change-over contacts and one normally-closed contact, for reliable switching of very low currents (1 mA @5 VDC) up to currents of 10A @ 110VDC. The relay has a delay-on and delay-off function. The delay times are independently adjustable with two lockable knobs. The relay can also be supplied with one or two fixed delay times (one knob or none). The relay needs an…

  • TDE4N-UN relay – Timer, delay-off, 4 pole

     Plug-in electronic railway timer relay with four change-over contacts for reliable switching of very low currents (1 mA @5 VDC) up to currents of 10A @ 110VDC. When the relay is de-energized there is a delay on drop-out without any auxiliary power supply. The delay time is adjustable with a lockable knob. The relay can also be supplied with a fixed time delay (no knob). The relay is equipped with…

  • TEAU 400 relay – Delay-on pull-in or drop-out, 4 C/O

     The TEAU 400 is a delay-on pull-in or drop-out relay with 4 double make / double break C/O contacts (form Z). The delay is fully programmable with a dip switch from 0.25 s to 63 min. The access to dip switch is available by removing time delay cover. This feature prohibits frivolous field time delay setting. The plug-in design offers secure locking feature for maximum ease of maintenance (no wires…

  • TELAU 400 relay – Delay-on pull-in or drop-out, 4 C/O

     The TELAU 400 is a delay-on pull-in or drop-out relay with 4 double make / double break C/O contacts (form Z). The delay is fully programmable with a dip switch from 0.25 hours to 255 hours. The access to dip switch is available by removing time delay cover. This feature prohibits frivolous field time delay setting. The plug-in design offers secure locking feature for maximum ease of maintenance (no wires…