14
Magtrol Load Monitoring Units LMU 212 & 217
Chapter 2 – Installation / Configuration
16
12
13
17
21
16
12
22
13
17
Supply -
Signal -
SENSE -
SENSE +
Supply -
Signal -
Strain gauge
transducer
Strain gauge
transducer
Wiring type 1
Wiring type 2
Fig. 2–7 Wiring types
For applications in conformity with the TÜV standard detecting short-circuits and/or failure of a
conductor in the connecting cable is compulsory. In this case no signal must be sent on terminals
21 (SEnSE+) and 22 (SEnSE-).
note :
Record the length of the cable between the transducer and the LMU
as well as its type on the configuration and calibration form (see
Appendix A
).
2.4.3
d
esignAtion
of
the
voltAge
And
current
inputs
/
outputs
The LMU load monitoring unit is fitted with a voltage input (U
I/P
) and also with two outputs, one
for voltage (U
O/P
) and one for current (I
O/P
).
note :
Record the designation of the external signals linked with U
I/P
, U
O/P
and I
O/P
on the configuration and calibration form (see
Appendix
A
).
2.4.4
c
onfigurAtion
of
the
detection
chAins
The load monitoring unit relays are used to detect under- and overloads. In case of an overload,
the relay is de-energised when the output voltage U
O/P
is lower than the threshold voltage U
level
.
In case of an underload the output voltage must be higher than the threshold voltage to de-energise
the relay. We shall come back on the adjustment of the threshold voltage when calibrating the load
monitoring unit.
Содержание LMU 212
Страница 48: ...41 Appendix B CE Conformity Declaration...
