6.2.1.2.2 Measuring Circuit Line Break Detection; Influencing A Measuring Circuit Channel Through A Quick Change In Temperature; Rtd) Version, 2-Channel Operation; X 2-Wire - WAGO -I/O-SYSTEM 750 Manual

74 Connect Devices

6.2.1.2.2 Measuring Circuit Line Break Detection

Metering in series results in a special behavior in the case of wire break, such
that this is always detected for both sensors connected to a measuring circuit.
This applies independently of the selected setting for "indicate wire break/short
circuit" (see section "Register assignment", Register 32).
6.2.1.2.3 Influencing a Measuring Circuit Channel through a Quick Change in
Temperature
As a rule, temperatures change relatively slowly. If a channel's applied resistance
changes over a short period of time by a large resistance value (large in relation
to the converted temperature change), then this can influence the other channel
within the measuring circuit.
6.2.2

750-464 (RTD) Version, 2-Channel Operation

6.2.2.1

2 x 2-Wire

Figure 11: Connection example, version 750-464 (RTD), 2-channel, 2 x 2-wire

Manual
Version 1.1.0
WAGO-I/O-SYSTEM 750
750-464 2/4 AI RTD configurable