Ultra Timer



Time period 1 second to 64 weeks – accurate DIL switch time settings – 4 modes of operation – wide operating voltage.


  • Working voltage 9.5 – 30V DC – auto selected by timer (no need to set input)
  • “Pulse” activation after time out – option on two of the modes
  • Selectable trigger and reset input polarity
  • 1 second to 64 week time period. Selectable by DIL switch – crystal controlled for accurate time
  • Double pole relay will switch mains – contacts rated at 8 Amps

Setting time period – seconds, minutes, hours, days and weeks – could not be simpler – just look up the time required in the “time table” and set the DIL switch accordingly.

Modes of Operation:

  • Operating Mode A – trigger applied – times out and activates the relay – if auto link is fitted relay drops out after 20 seconds and is then “waiting for next trigger”
  • Operating Mode B – trigger applied – relay activates for time period then drops out. It is then ready for the next trigger.
  • Operating Mode C – once applied the trigger must remain for the duration of the time setting to activate the relay. An example of this would be monitoring a fire door. If the door is opened the timer starts (say it has been set for 3 minutes) if the door closes before the three minutes nothing happens, however if the door is open after the 3 minutes the relay will activate – if auto link is fitted relay drops out after 20 seconds and is then “waiting for next trigger”
    Activation – trigger and reset input polarity is set by jumper links.

Input Levels for Trigger or Reset:

  • LOW: Less than 220 ohms to ground OR an input of less than 0.8 volts
  • HIGH: Greater than 4700 ohms to ground OR an input of greater than 4 volts
  • Maximum input voltage 30V
  • Minimum input voltage -4V
  • Peak current available from either pin, 5mA

Output Levels (Double pole contacts):

  • AC: Maximum switching voltage 250 volts, maximum current 8 Amps (non inductive load)
  • DC: Maximum switching voltage 30 volts, maximum current 5 Amps (non inductive load)
  • Minimum switching level 5V @ 10mA

Environmental Conditions:

  • Temperature range -10°C to +60°C
  • Maximum humidity 80% non condensing

Supply Voltage:

  • Between 9.5 to 30V, automatically selected by the timer, no need to set jumpers or cut links.

Unit Supplied in strong cardboard carton with 4 sticky fixers

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SKU: ACCAT-372 Category: Tags: ,

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