Gasboy 9820A Series - Manual (Page 21)

Control Lines
03/07/03 3-3
PULSE OUTPUT
This option provides a DC pulser output to indicate the quantity dispensed. This is an open
collector output. This output can sink up to 150 milliamps DC at voltages up to 24 VDC. The
pulse rate can be configured by a sealable DIP switch for rates of 1, 10, 100, 250, 500, or 1000
pulses per gallon or 1, 10, 100 or 250 pulses per liter. This output should only be used when
monitoring of the unit's operation is desired.
RS-485
When the dispensing unit includes the optional RS-485 interface, RS-485 lines are provided. This
interface allows the user to connect a GASBOY CFN Series System directly to the Series 9820A
dispensing unit.