Specifications

D1600 Data Sheet B-4
module contains an internal 1MΩ resistor connected from the +IN to +2.5V
for biasing. A .01 uf cap may be used for frequencies down to 10HZ.
D1630/D1640 Accumulator Modules
Figure B-5. Accumulator Block Diagram.
The Accumulator models are: D1631, D2631, D1632, D2632, D1641,
D2641, D1642 and D2642 are designed for applications that require
reading and accumulating pulse type information. They can accumulate
the output of pulse type flow meters or keep track of power consumption
by interfacing with a power meter. The Accumulator modules combine a
frequency or pulse input circuit with an event counter. These modules
allow a host computer to read both rate and total count of events. As
shown in figure B-5 the input signal is passed through a comparator and
the output of the comparator is sent to the microprocesor and to an event
counter. Use the Read Data (RD) command to read the instantaneous
value or rate of the frequency or pulse input. Use the Read Events (RE)
command to read the total of events since the last time the event counter
was cleared. Use the Events Clear (EC) command to read the total of
events since the last time the event counter was cleared and clear the
counter. The event counter will count up to 10 million transitions.