Connection Examples; Figure 10: Connection Of A Measuring Bridge To A Supply Voltage Via The I/O Module - WAGO I/O-SYSTEM 750-491 Manual

28 Connect Devices
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6.2

Connection Examples

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Use shielded signal lines!
Only use shielded signal lines for analog signals and I/O modules which are
equipped with shield clamps. Only then can you ensure that the accuracy and
interference immunity specified for the respective I/O module can be achieved
even in the presence of interference acting on the signal cable.
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The measuring bridge connected to the 750-491 I/O module can be powered by
the I/O module via the +U
(see figures below).
If the measuring bridge is powered by an external voltage supply, a common
ground potential must be established by a bridge from −U
−U of the external voltage supply.
V

Figure 10: Connection of a Measuring Bridge to a Supply Voltage via the I/O Module

and −U connections or by an external voltage source
V V
WAGO-I/O-SYSTEM 750
750-491 1AI DMS
of the I/O module to
V
Manual
Version 1.2.0