ero electronic DPS - Thermocouple Input Wiring; Rtd Input Wiring

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B) INPUTS

Fig. 2.4 THERMOCOUPLE INPUT WIRING

NOTE: Don’t run input wires together with power cables.

Use proper compensating cable preferably shielded (see

Table 1).

If shielded cable is used, the shield must be grounded at one

point only.

Pay attention to the line resistance; a high line resistance

may cause measurement errors (see PRODUCT SPECIFI-

CATIONS).

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Fig. 2.5 RTD INPUT WIRING

NOTE: Don’t run RTD wires together with power cables.

If shielded cable is used, the shield must be grounded at one

point only.

Use copper wires with appropriate size (see "PRODUCT

SPECIFICATIONS").

The resistance of the 3 wires must be the same.

Any external components (like zener barriers etc..) connected

between sensor and input terminals may cause errors in measure-

ment due to excessive and/or not balanced line resistance or

possible leakage currents.

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