29 Analog weigh module XN-322-2DMS-WM
29.3 Wiring
228
XN300 slice modules
06/16 MN050002 EN
www.eaton.com
29.3 Wiring
The module supports the use of two Wheatstone bridges. These bridges
need to be wired with a four-wire or six-wire configuration.
29.3.1 Four-wire connection
When using a four-wire connection, only X1 or X4 is wired to the Wheatstone
bridge. This means that the Wheatstone bridge will be powered via V+ / V-
and that the corresponding readings will be acquired via I+ / I-.
Reference output V+ and reference input R+, as well as V- and R-, need to be
connected to each other at X2 and X5.
The advantage of using this configuration is the fact that only a small number
of connection cables are required. However, using this operating mode also
means that the cable resistances will affect the measurement in the form of
an error.
Figure 120:
Wiring diagram for four-wire connection using AI1 and AI2
29.3.2 Six-wire connection
When using a six-wire connection, the voltage drop at the cable extending
from the module to the Wheatstone bridge is measured via R+ and R- and
taken into account in the measurement.
This means that when this operating mode is used, the cable resistance will
not affect the measurement in the form of an error.
X1
V+
I+ I-
V-
V+
I+ I-
V-
X2
X3
X4
X5
V-
V+ R+ R-
PE
24 V
0 V
SH
SH SH SH
V-
V+ R+ R-
R
L
R
L
R
L
R
L
PE
PE
Содержание XN300
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