Neptune 6500
15
4.2
TTL SET POINT 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.
4.2.1 SETPOINT OUTPUTS
The Neptune 6500 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. Setup step F15 allows control over external set
point number 2. A value of 0 (zero) will cause the set point to remain high when the
condition is met. You may enter a value of 1/10s of a second to cause SP2 to alternate high
and low when the condition is met. An common example of how this delay is used would be
to flash a light on and off when the accept condition is met. Over and under would show a
steady light.
SP1
SP2
SP3
On if < Min value
On if >= Min value & < Max
On if >= Max value
See F15 for always on or delay time
Only one set point is active at a time. When a set point is active, the others are not.
Summary of Contents for Neptune-6500 Series
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