Daisy Chaining - BIG ASS FANS powerfoil x2.0 Installation Manual

Daisy Chaining

The Powerfoil X 2.0 fan is preprogrammed to operate in Master/Slave or Daisy Chain mode. Starting, stopping, and speed control
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signals are transmitted by the master fan controller to remaining slaved fans via 0–10 VDC analog outputs. The wall controller for the
slaved fans remains active as a display so that the operator can still view any fault messages, toggle between output frequency and fan
RPM displays, or operate the fan via the LOCAL/REM button.
The LOCAL/REM button toggles the fan's command sources between the wall controller (LOC LED illuminated) and
LOCAL
external sources (REM LED illuminated). In a daisy chained installation, the master fan controller will operate via the wall
REM
controller (local mode), and the Slaved fan controller(s) will operate via the 0–10 VDC command reference provided by the
master fan controller (REM mode). Note: To access the LOCAL/REM button, the controller cover must be removed.
Wall controller unit
Master fan controller
"LOC" LED is illuminated
In the example above, the first controller is the master controller (local mode). The remaining fans (REM mode), when connected with
a two-conductor shielded cable, will follow command references provided by the master controller. See the following page for detailed
wiring diagrams. Limit two-conductor shielded cable runs to 200 ft (61 m) or less. Consult Big Ass Fans Customer Service Department
for conversion to 4–20 mA current loop.
System redundancy
If one of the fans in the chain is disabled, the next fan controller in the chain can become the master controller for all remaining fans by
pressing the LOCAL/REM button on that fan's wall controller.
Master
8'–24' POWERFOIL X2.0 WASHDOWN & POWERFOIL
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Electrical Installation (cont.)
2 Conductor shileded
CAT 5 cable
Slaved fan controller
"REM" LED is illuminated
Slave Disabled
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X2.0 PLUS WASHDOWN
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cable with drain lead
Slaved fan controller
"REM" LED is illuminated
Master
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Slaved fan controller
"REM" LED is illuminated
Slave Slave
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