23
Logic input connections and front buttons
The logic input provides a 5V DC signal. When you connect this to common, a current of
1mA will flow. Because this is a small signal, we recommend you use switches with gold
plated contacts, or self cleaning contacts, for best long term reliability.
The logic inputs are not galvanically isolated from the input signal.
The logic inputs are only activated when the lockout switch is ON
Logic Inputs Power
Signal I/P & Excitation
1 2 3 4 5 6 7 8 9 10
11 12 13
Normally open (disables front
panel Tare, Peak/Valley and
Reset buttons)
Normally closed (this enables
front panel Tare, Peak Valley and
Reset buttons also) Or simply link
NPN (could be opto-isolators if
you need the logic control lines to
be galvanically isolated from the
input signal.
To enable the front panel buttons, you must connect the logic input for that function to
common. If you want to have both front panel and remote tare, reset and peak/valley func-
tions, you can use normally closed pushbuttons for the remote switches.
Tare =
Tares display to 0. Often used in weighing systems to zero a display
prior to making a measurement. Net weight is shown once tared.
When a display has been tared the small LED above the Set1
button will be illuminated.
Peak/Valley =
Allows you to view the maximum and minimum values
which have been displayed since last reset. 0% LED illuminates
when showing valley, 100% LED illuminates when showing peak.
Reset. =
This clears any tare, peak, valley, alarm latch
ON
OFF
Set1
Set2
Output
Alarms
Digit
OK
Max/Min
Reset
Sh
o
w
in
g
N
e
tt
v
a
lu
e
(s
te
a
d
y)
S
h
o
w
in
g
G
ro
s
s
v
a
lu
e
(
fl
a
sh
in
g
)
Sh
o
w
in
g
V
a
lle
y
Sh
o
w
in
g
Pe
a
k
C
o
m
mo
n
Ta
re
Pe
a
k/
V
a
lle
y
R
e
se
t
