DIG-NRTC

The Microsolve real time clock, uses the latest Flash CMOS microprocessor technology with crystal control for timing operation. This makes the unit reliable and compact and simple to use with a long battery life exceeding 3 years with no power.

All inputs to the timer are active when taken to ground, so that connections to proximity switches and mechanical switches is simple. This also allows proximity switches to work off other voltages above 12V DC to interface to the real time clock. This method of input detection lends itself immune to electrical noise, since noise generated by electrical devices switching on or off always create positive going spikes. Input protection against spurious spikes and noise has been eliminated by field proven design. The Seconds input resets the seconds to zero the moment a contact is made, ensuring perfect timing. The hours and minutes are then set after zeroing the clock.

Timing during power failure does not degrade the crystal frequency, making the unit immune to power dips and power failures. The unit is suitable for production lines or operating theatres where accurate timing is critical.

Specifications

Aux Supply

12V, 24V, 48V, 110V, 230V, 400V, 525V +/- 20% of nominal supply.

Power Consumption

2VA

Input

NPN or potential free contact

Clock accuracy

100 PPM per degree centigrade

Seconds Input is master and will over ride all other inputs

Battery backup on power fail

Output supply

12V D.C. @ 50mAmp

Operating Temperature

–5 to 60 degrees centigrade

Relative humidity

Maximum 75% at 40 degrees Celsius