ABB RAIO-01, User Manual

Page: 19 / 28

Chapter 3 – Installation
RAIO-01 User’s manual 19
Wiring
0.5 to 1.5 mm
2
twisted pair cable with individual and/or
overall shields should be used for analogue signals.
The shields should be connected to the SHLD terminals
on the RAIO-01 module. See the example below.
Figure 3 Wiring example
Note: If the transducers or indicators are located far
away from each other, earth the shield at one unit
through a capacitor (e.g. 10 nF/400 V) to avoid
circulating earth current flow.
Note: X1 and X2 have separate RC circuits as shown
above, i.e. the SHLD terminals on one terminal block
are connected together and earthed through a common
RC circuit.
AI1+
AI1-
SHLD
Transducer 1
AI2+
AI2-
SHLD
Transducer 2
Indicator 1
Indicator 2
T
SHLD
AO2-
AO2+
SHLD
AO1-
AO1+
RAIO-01
P
X2 X1