MODULAR SUNWAY TG
TE OD
INSTALLATION GUIDE
68/
139
Rev. 03
– 01/06//2018
Figure 35: Connection to 0
– 100 mV analogue input
6.6.3.3. Analogue Inputs to Sensors with Current Output
Connection of the slow analogue inputs to current sources is illustrated in Figure 36. The channels capable
of receiving current signals with 20 mA f.s. are XAIN8, XAIN9, XAIN10 and XAIN11, which correspond to
terminals 27, 29, 31 and 33. As always, it is necessary to set the configuration DIP-switches relative to the
analogue channel used by setting the end scale at 20 mA f.s and setting the relative programming parameter
at 0
– 20 mA or 4 – 20 mA.
Figure 36: Connection of 0
– 20 mA (4 – 20 mA) sensors to current inputs
6.6.3.4. Analogue Inputs to PT100 Thermistor
The environmental sensors and field I/Os expansion board makes it possible to directly carry out
temperature measurements by means of the connection to the standard PT100 thermistor. To simplify wiring
a two-wire connection has been adopted. For this reason it is highly recommended to limit the length of the
connection cable and ensure that the cable is not exposed to high temperature variations during operation.
The channels capable of receiving PT100 signals are XAIN8, XAIN9, XAIN10 and XAIN11, corresponding
to terminals 27, 29, 31 and 33. Figure 37 illustrates how to carry out connection: it is advisable to use a
shielded cable whose braid is connected directly to the inverter's metal frame using the cable holding
terminals provided.
If the connection is made using a cable over 10 metres in length, system measurement calibration must be
carried out. For example, if the connection is made using a 1 mm
2
(AWG 17) shielded twisted pair, a reading
error equal to approxi1°C occurs for every 10 metres of cable.
Measurement calibration is obtained by connecting, in place of the sensor, a PT100 sensor emulator set at
0°C (or a precision resistor at 100
0.1%) to the line terminals and then correcting the relative offset value
(please refer to the Programming Guide).
