AB-6438
15
Precautions for Wiring of Infilex AC and Devices
System common wiring
Ground line (
) is used as a common line for signal transmission to/from the field devices.
For the system common, the common-mode power must be supplied to Infilex AC and each device (such as ACTIVAL™) via the
wires connected to "~" and "
" terminals of Infilex AC and each device. For the signal transmission between Infilex AC and each
device, use "
" wiring.
Figure 10. Wiring example: System common wiring
IMPORTANT:
Use an isolation transformer. Do not ground the secondary side of the transformer.
Provide a terminal block aright ahead of the transformer, and divide the
line at the terminal block to connect
to each device. (See Fig. 10.)
Inverter
Figure 11. Wiring example: Inverter
IMPORTANT:
Shielded cable must be single-point grounded on the inverter.
24 V AC
Inverter
From
From
+
-
Infilex AC
Terminal block for
branching
Infilex AC
ACTIVAL or
damper actuator
ACTIVAL or
damper actuator
+
-
+
-
