Eaton XN300 - 33.3 Wiring topic

33 Analog weigh module XN-322-2DMS-WM
33.3 Wiring topic
257 XN300 slice modules 02/24 MN050002EN Eaton.com
33.3 Wiring topic
The module supports the use of two Wheatstone bridges. These bridges
need to be wired with a four-wire or six-wire configuration.
33.3.1 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 138: Wiring diagram for four-wire connection using AI1 and AI2

X1
V+ I+ I- V- V+ I+ I- V-
X2 X3 X4 X5
V-V+ R+ R-
PE
24 V
0 V
SHSH SH SH
V-V+ R+ R-
R
L
R
L
R
L
R
L
PE PE