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Mounting
For TachStrip part number 015B625-F to be used as
separate alarms, cut the web separating alarm
units at the designed location with ordinary
cutting pliers.
DC Fan Connection
For three wire DC fans operating at supply voltages
between 5.0 and 25.0 VDC, TachStrip distributes
power to the fan in addition to accepting
tachometer pulses from the fan. Connect the
fan wires to J1. Fan wires are usually color coded
with red for +, black for - and white or yellow
for A (alarm).
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The maximum current that can be distributed
to the fan via header J1 is 4.0 Amps.
Normally it is necessary to connect power to only
one J2 header in a TachStrip (015B625-F). However,
this connector is rated at 4.0 Amps maximum. If
the total current used by all DC fans powered by
TachStrip exceeds 4.0 Amps, power connections
should be made at additional + and - pins.
DC Fan Tachometer Signal Compatibility
For most fans, the amplitude of tachometer pulses
will be equal to the voltage applied to the fan
(e.g. a 12 VDC fan usually generates 12 VDC
tachometer pulses). However, some fans generate
tachometer pulses at a lower voltage (e.g. 5 VDC
pulses from a 12 VDC fan). In these cases,
TachStrip must be powered with a voltage equal
to or less than the amplitude of the pulses generated
by the fan and it cannot therefore, distribute
power to the fans.
DC Fans Operating Above 24 VDC
Though the maximum voltage that can be
applied to TachStrip is 25 VDC, it can be used
with fans operating at higher voltages. In this
case, it does not distribute power to the fans. A
supply voltage equal to or less than the amplitude
of the pulses supplied by the fans is used to
power TachStrip. Connect the negative fan lead
to J1:- and the fan tachometer pulse lead to J1:A.
No connection is made to J1:+.
AC Fan Alarm Monitoring
TachStrip cannot distribute AC power to an AC
fan. AC fans usually have 5 wires, 2 for power
and 3 for the tachometer pulse circuit. Connect
the AC fan power leads to the rated source of
power. Connect the three tachometer pulse leads
to J1. TachStrip distributes power to run the
tachometer pulse circuits within the fans. Apply
a DC voltage as specified by the fan manufacturer
for the tachometer pulse circuits at J2.
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