13
Magtrol Load Monitoring Units LMU 212 & 217
Chapter 2 – Installation / Configuration
4. When using a 230 VAC, 115 VAC or 48 VAC supply always connect the LMU to the ground as
shown on
figure 2–6
:
B
C
B
A
N.Buri
A.Rappo
Corinne B.
14.03.97
14.03.97
14.03.97
Pos.17 removed !
Pos.5 and 6 changed; pos. 9 removed !
Pos. 18 added
N.B.
N.B.
N.B.
C.S.
C.S.
C.B.
02076
01062
97133
12.12.02
03.12.01
02.07.97
LMU 112
LOAD MONITORING UNIT
1:5
LMU212mise à terre
1
3
2
1
3
2
A
B
C
C
D
D
Approved
Checked
Drawn
DRAWING N°
Scale
Repl. for:
Repl. by :
Appr.
Finish:
Material:
Tolerances: ± mm to 50mm, ± mm over 50mm
Drawn
PM
Date
Rev.
1
2
3
4
5
6
THE INFORMATION DISCLOSED HEREIN WAS ORIGINATED BY AND IS THE PROPERTY OF MAGTROL SA.
MAGTROL SA RESERVES ALL PATENT PROPRIETARY, DESIGN, USE, SALE, MANUFACTURING AND
REPRODUCTION RIGHTS THERETO.
Fig. 2–6 LMU grounding when using a 230, 115 or 48 VAC supply
Connect the earth wire to the ground screw and the LMU terminal n° 18 to the ground screw.
WARNING! WheN usING A 48 / 115 / 230 vAc supply AlWAys
mAke suRe ThAT The lmu housING Is AdequATely
coNNecTed To The GRouNd!
2.4.2
s
election
of
the
type
of
wiring
to
the
strAin
gAuge
The choice of the type of wiring depends on the length of the cable between the LMU and the strain
gauge transducer, on the impedance of the transducer and the linear resistance of the cable.
If the linear resistance of the cable is
≤
0,1
W
/m, the impedance of the strain gauge transducer is
≥
200
W
and the length of the cable is
≤
100 m, the wiring of type 1 can be selected (see
figure 2–7
).
The wiring of the type 2 of
figure 2–7
applies to cable lengths of more then 100 m or when the cable
length has been changed after the calibration of the load monitoring unit.
