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2- Inputs and outputs
2�3�2 Temperature inputs
The temperature sensors share just ve earth
connections (GND). That means that in some
places, two wires will use the same terminal.
The sensor impedance is about 1000 ohm,
and the line impedance is insignicant. 4
ohm corresponds to about 1 degree. Long
cables and cables subject to interference
must be shielded. The shielding must be con-
nected to protective earth at one end.
The sensors are connected in the same way if you are using the temperature inputs as digital inputs.
Important: You must invert these inputs to obtain the same function as the normal digital inputs.
2�3�3 Analog inputs
The WMPro has four 0-10 V voltage inputs and four 0(4) - 20 mA current inputs. The voltage is meas-
ured to earth (GND).
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