Retrotec Multi-Fan Blower Door - Manual (Page 25)

Page 25 of 37
©Retrotec Inc. 2015
6.2 Connecting 3350 fan drives (2012 and later)
3350 fan drives were manufactured after February 2012 featured the
convenience of “In” and “Out” Control Cable CAT5 connectors to
daisy chain fans together, a speed control knob, maximum speed
adjustment port and a large orange power switch. No pressure ports
were on the drive.
Some earlier units say “for 3000 fans” on the front but the “3350”
label on the back plus the above features identify it as a Model 3350.
3350 drives work with DM-2 and DM32 gauges.
Figure 25 and Figure 27 shows how to make connections for Common set point or
Individual set point control. Figure 28 shows connections where 3300 and 3350
drives are both used (which is not recommended). Figure 26 shows how to use
the Multi-fan Umbilical to connect 3350 drives for Common set point control.
WARNING: Connect Model 3300 and Model 3350 Drives together ONLY with
the Model FN280 splitter or risk damage to your computer and drives.
Figure 24: Cable ports on Model 3350 fan
drives from 2012 and later.
DO NOT use a splitter with Yellow
connectors and
DO NOT daisy
chain a 3300 to a 3350 .