London Electronics IL2-L, Connection Details, Scaling And General Information

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11
Connections
A
la
rm
L
o
c
k
C
a
li
b
’n
L
o
c
k
C
o
m
m
o
n
T
a
re
P
e
a
k/
V
a
lle
y
R
e
se
t
Logic Inputs Power Signal I/P & Excitation
E
xci
ta
ti
o
n
-
S
e
n
se
-
S
ig
-
S
ig
+
S
e
n
s
e
+
E
xci
ta
ti
o
n
+
4 wire connection
for short cable runs
Cable and/or zener
barrier resistance
N L
- +
Looking for high performance?
See application notes on next page, for hints
on getting the best performance from your
weighing system.
Remote
contacts
(5V DC 1mA)
!
Warning:
Disconnect all power before
exposing the rear of the meter
Millivolt input only?
Link Exc+ to Sense+ and link Exc- to Sense-
Set Sig- to 5V using 2 x 10K resistors.
!
Class II Installation
N
o
t
u
s
e
d
Cable and/or zener
barrier resistance must
not cause the excitation
voltage to drop below
4V.
NB If using galvanic
isolation barriers,
connect 10K from
terminal 2 to terminal 3
and 10K from terminal 3
to terminal 5 to maintain
the input signal within
the common mode
range of the excitation
sense circuit.
Fuse Switch
Circuit breaker
P
o
w
e
r
Customer-supplied disconnection
and overload protection devices
1 2 3 4 5 6 7 8 9 10 11 12 13
Important - Sense + and Sense - must always be referred to the excitation voltage. Never leave these terminals open.
1 2 3 4 5 6
- mV +
10K
10K