iDOS™ can accept pulses, 4-20 ma, 0-5 VDC, 0-10 VDC, Modbus and any other standard instrumentation output signal. Low voltage output signals are connected by CAT5 cable to designated screw terminals in the iDOS™ panel.
The most common type of signal provided by Utility Meters is a pulse from a set of external contacts:
A pulse must be provided every 30 or 60 seconds minimum, that is proportional to a quantity of energy used. This type of pulse allows the user to monitor the effect that load variations in large systems have on the main Utility Meters.
Pulses that are sent infrequently in bursts of 10 or 20 may allow a utility to electronically read total consumption but they are not acceptable for understanding and managing Real-Time consumption and demand within a facility.
Some electric utilities will provide 2 pulses per meter to allow monitoring of KVAR, KW and Power Factor.