Yokogawa 212 Heat Calculator User Manual
Page 58
The output on terminal 16 is capable of sinking up to 100mA maximum and can
withstand external voltages of 30 Volts. Reverse polarity and inductive load
protection is provided.
Two connection examples are provided. If a voltage pulse output is required, an
external load resistor must be used as shown on the second diagram.
The pulse output can be programmed during Set-up as an energy or volumetric
flow output. The pulse rate is also programmable, so that a pulse can, for
example, be programmed to occur every .001m
3
.
Duration of the pulse is around 10ms thus the maximum pulse output frequency
is 49Hz. Hence, in the above example, if the volumetric flow rate was 60
m
3
/hour, then this is equivalent to 0.0167 m
3
/sec. If a pulse occurs every 0.001
m
3
then the output frequency would be 16.7 Hz.
56 Input & Output Connections