Class1 ITL Tank Level Driver Module 107451 - Manual (Page 4)

Intelli-Tank Manual (106759) 050304 – 4 – Class 1
The auto-fill function will energize the fill output when the tank level is at or below ¾ and de-
energize when the Master display reads FULL. Auto-fill will also de-energize the fill output
and turn off the auto-fill status light if there is no data being received on the data line from
the Master display (serial error) or if a transducer error high or low (range error) is
encountered.
4 Outputs for the level lights
Four outputs are available to drive external lights to indicate tank level. These are positive
voltage outputs are capable of 7.5A each (Full light is output 4).
Alarm and alarm silence
The alarm output (pin 3) activates when the tank level falls to below ¼ tank or 10 seconds
after a data line problem exists. The alarm output is a positive voltage output capable of
250mA. The alarm silence input (pin 5) will turn the alarm off during any alarm
circumstance. The alarm silence activated by a momentary ground input.
1-wire serial interface
The 1-wire serial interface is the link between the master tank level module and any other
remote modules. If the output driver module loses the serial link all outputs will be
deactivated and then the output lights will alternate flashing the upper two lights and the
lower two lights, and the auto-fill function will be deactivated. After 10 seconds in this
serial failure condition the alarm will sound (it can be turned off with the alarm silence
switch).
Dim level light outputs
The output lights are set to the dim condition (50% duty cycle) when a ground is input on
pin 6.
Module LED indicators
There are 3 LEDs on the front of the remote driver module. The RED LED indicates that
the circuit board has power. The YELLOW LED indicates the power stud has power. The
GREEN LED indicates the condition of auto-fill mode and will react the same as the auto-
fill status light output (pin 2).