750-464/020-000 (Ntc) Version; X 2-Wire; Special Features; Influencing A Measuring Circuit Channel Through A Quick Change In Temperature - WAGO -I/O-SYSTEM 750 Manual

76 Connect Devices
6.2.3

750-464/020-000 (NTC) Version

6.2.3.1

4 x 2-Wire

Important information for 4-channel operation
Please note the special features in the following chapter

Figure 13: Connection example, version 750-464/020-000 (NTC)

6.2.3.2

Special Features

6.2.3.2.1 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.

6.2.3.2.2 Underrange and Wire Break

Depending on the hardware, it is not possible to distinguish between a
(temperature) underrange and a wire break when using the NTC version 750-
464/020-000. In the case of wire break, an underrange is always detected.
Manual
Version 1.1.0
WAGO-I/O-SYSTEM 750
750-464 2/4 AI RTD configurable