Neptune 5500
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CHAPTER 4: ADVANCED FEATURES AND OPERATION
4.1
TTL SETPOINT OUTPUTS
This function works utilizing three 5Volt TTL outputs and allows your scale to work within a
specialized system. This is useful if you are filling individual containers to a pre-determined
TARGET weight value, or if you are check weighing individual portions, you can utilize the
set points to activate an internal buzzer that will sound when the TARGET set point is
reached.
Each output is an open-collector circuit, capable of sinking 250mA when ON. All logic levels
are active low. The circuits i-5 V resistors to drive TTL or 5 V CMOS logic without
additional hardware.
4.1.1 SETPOINT OUTPUTS
The Neptune 5500 has three annunciators on the front display to indicate UNDER,
ACCEPT or OVER. If you want to use an external device to signal the check weigh
condition, use the external TTL outputs. The same condition that drives the internal
annunciators will drive the external device.
4.1.2 DISABLE SETPOINT OUTPUTS
Setting F24 to 0 allows user to disable check weigh mode. This function allows repeated
switching of units without having to enter set point values. The four displayed units, LB, KG,
OZ and LB/OZ will repeat over and over without having to enter the over and under values
for check weighing.
MIN VALUE MAX VAULE
SP1 SP2 SP3
On if < Min value On if >= Min value & < Max On if >= Max value
Only one set point is active at a time. When a set point is active, the others are not.
