A-AT-372

## ~~-~~ AT= AT ~~-~~ 372 372 Ultra Timer 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) 

   - 1 second to 64 week time period. Selectable by DIL switch - crystal controlled for accurate time 

- “Pulse” activation after time out - option on two of the modes 

   - Double pole relay will switch mains - contacts rated at 8 Amps 

- Selectable trigger and reset input polarity 

- Four modes of operation 

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 

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. 

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” 

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, 

Activation - trigger and reset input polarity is set by jumper links. 

## Specification 

## 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) 

## Environmental Operating 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 

## Dimensions 

77.9 X 47mm 

## Packing Weight 

80 grams 

Minimum switching level 5V @ 10mA