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30
9.9 - Connecting more than 32 fans (daisy chaining)
The gateway is capable of communicating with only 32 unique serial addresses; however,
it is possible to connect more than 32
fans on a single gateway installation utilizing each fan controller’s 0–10VDC daisy chaining setup
as illustrated below.
Each
fan controller contains a single 0–10VDC analog input for speed reference, as well as a 0–10VDC analog output; therefore, there is no
signal loss from fan to fan, as each fan controller acts as a 0–10VDC repeater.
In this arrangement, a “fan” represents a group of fans, which are connected by the 0–10VDC analog loop. All fans on the 0–10VDC
loop will behave identically. This is known as a master/slave setup or daisy chain, with the master being the first fan in the chain on the
Modbus loop. You will reach a practical fan quantity limit based on square footage of your facility and/or for safety reasons before you
find a physical hardware limitation. For 0–10VDC analog signals, an 18–20AWG, two-conductor shielded cable is recommended for
distances up to 100 ft (30.5 m). See the fan's Installation Guide for connection details.
Powerfoil X Series
Serial Address #1
Gateway
Location
Modbus cable
Powerfoil X Series
Serial Address #2
Powerfoil X Series
Serial Address #1
Powerfoil X Series
Serial Address #2
Max 32
Modbus cable
Modbus cable
0–10VDC
0–10VDC
0–10VDC
0–10VDC
0–10VDC
0–10VDC
0–10VDC
0–10VDC
0–10VDC
0–10VDC
0–10VDC
0–10VDC
Receiving Docks
Shipping Docks
Aisle Way #1
Aisle Way #2
Daisy chain-capable fans and controllers
•
Powerfoil
®
X Series fans with Delta E Series VFDs or Delta M Series VFDs
•
Powerfoil
®
8 and Basic 6
®
fans with Lenze SMVector VFDs
•
Powerfoil
®
and Wickerbill fans with Allen-Bradley
®
PowerFlex
®
40 VFDs
•
Any other fan system using VFDs that include both an analog input and analog output
9 - Big
Ass
Fans Electrical Installation (cont.)
