LonWorks Communication Bus Fundamentals
Network Guide
65
Figure 39: Power wiring - 24VDC: Maintain Consistent Polarity with all Controllers' Power Connections
Figure 40: Power Wiring example
Controller 2
Controller 1
24V AC/DC
24V COM
Fuse: 4 A Max .
Fast Acting
OPTIONAL : Connect to Electrical System
Ground - At Power Supply Only
24V AC/DC
24V COM
24 VDC
24 VAC
AC Power
Source
24 / 120 / 208 /
240 / 277 / 347 /
480 VAC, 1Ø, 2-
Wire plus Ground
24V COM
24V AC/DC
BACnet Device
Power Supply
Fuse: 4A Max.
Fast Acting
C
RC
BACnet Thermostat
24 VAC/COM
to Ground –
At Transformer
Only
(OPTIONAL)
Maintain consistent
polarity when connecting
controllers and devices to
the transformer.
The
24V COM
/
C
terminals of all devices
must be connected to the
power supply bus that is
grounded.
24V COM
24V AC/DC
BACnet Device
GND
24V COM
24V AC/DC
BACnet Device
GND
Ground connection
is isolated from
24V COM
(OPTIONAL)
Содержание ECB-VAV
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