MTEK6000 SERIES USER'S MANUAL
Volume and Alarm Pulse Specifications
1.All pulse outputs are isolated from ground and each other. Provides 1,500 volts between input and output and between contact sets.
2.Form C: DC load only, 125mWdc max, 50Vdc max
Form A: AC or DC load 800mW max, 400V max., 100mA max, continuous
3.Configurable pulse width from 1 to 5,000 milliseconds (ms).
Uncorrected Mechanical Pulse Output (Units with a Metretek Index)
The uncorrected mechanical pulse output is derived from the Form C reed switch in the index assembly. As the magnet in the drive's assembly rotates past the Form C switch, a single uncorrected volume pulse output is generated. Volume per pulse is determined by the drive rate. Each uncorrected volume pulse is equal to the gas flow for one shaft revolution.
The pulse output can be wired as a Form A or Form C switch output. Use terminals 25 (normally open), 24 (common) and 23 (normally closed) for Form C output. To wire as Form A, use terminals 25 (normally open) and 24 (common) and make no connection to terminal 23 (normally closed). The duration (width) of each pulse is equal to the length of time the reed switch is in its closed position (depends on the rate of the meter). No configuration is necessary to enable the uncorrected mechanical pulse output.
Uncorrected Pulse Output Specifications
1.3W contact rating (power dissipation).
2.Maximum switching voltage up to 30V.
3.Maximum switching current up to 200mA.
4.Maximum continuous current @ 500 mA.
NOTE
All pulse outputs are disabled in the standard unit to conserve power. The Alarm pulse output is a one time pulse output signal. No other alarm pulse will be generated until the alarm is cleared and becomes active again.
January 2002 |