7
UK
6.1.1 Connection of a 2-wire Pt100 element
2
1+...4+
1
1-...4-
The terminals 1+���4+ are intercon-
nected in the module�
1: Analogue module
2: Pt100 element
6.1.2 Connection of a 4-wire Pt100 element
4-wire Pt100 sensors supply more exact results than 2-wire sensors provi-
ded that the wire resistance is the same�
The changeover between 2 and 4-wire sensors is made via the parameter
bit P3�
Connect at least one Pt100 sensor prior to switching on the AS-i slave, to
start the A/D converter� Otherwise the LEDs I1 to I4 flash at a frequency of
approx� 5 Hz�
2
1+...4+
1
1-...4-
S+
S-
The terminals 1+���4+ are intercon-
nected in the module�
1: Analogue module
2: Pt100 element