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31
September 2015
Using Pulse Sensors on a LINK900 communication system with an ESP-
SATL controller
Sensors with less than 100 pulses per minute: When using a Pulse sensor, the method to
connect it to the ESP-SATL, MAXI
®
Interface Board (ESPMIBL) will vary depending on the
maximum rate of pulses output by the sensor. On the LINK900 communication system, the
Central Control will only recognize a maximum of 100 pulses per minute. If the Pulse sensor
being used will never exceed this value, it can be wired directly to the MAXI
®
Interface Board of
the ESP-SATL controller. Here is an example using a tipping bucket:
Sensors with more than 100 pulses per minute:
Flow meters and wind anemometers are
types of Pulse sensors that will almost always exceed 100 pulses per minute. In order to
decrease the number of pulses sent to the central, a Pulse Transmitter must be installed. The
Pulse Transmitter is programmed to scale the number of pulses delivered by the sensor and
allow them to be recognized by the central control. Two models of Pulse Transmitters are
available: PT-3002 and PT-322.
Example using a paddle wheel flow meter:
If the number of pulses from the flow meter will have a maximum count of 300 pulses per
minute, the Pulse Transmitter would be programmed to receive 3 pulses before emitting 1
pulse to the ESP-SATL controller.