4
VI. Description
Standard KoolTray II
The KOOLTRONIC
KoolTray II
delivers cooling air to hot spots by localizing fan placement to the heat generating
area(s). With its 1¾-inch [44.5mm] single-U height it fits right under card racks or near heat-producing sources.
Standard units are available in 1, 2, or 3 row models. 19-inch [482.6mm] unit width is standard.
Smart KoolTray II
In addition to specific cooling fan placement, the
Smart KoolTray II
provides two optional choices of component
protection. The
X5
option sends both a visual and external alarm in the event of fan failure or low fan speed. The
X7
option varies the fan speed as temperature decreases or increases relative to the set point and sends an alarm
for high temperature conditions. The
X6
option combines both the X5 and X7 options.
Filtered KoolTray II
For environments which require filtration of the ambient or cabinet air, KOOLTRONIC’s
Filtered KoolTray II
filters
the air from the bottom side of the tray. Other filter location options are available. Filtered versions are available on
both the
Standard
and
Smart KoolTray II.
Options for Smart Kooltray II
OPTIONS:
X5
X6
X7
Individual Fan Sensors
x
x
Variable Speed Fans
x
x
AC
x
x
x
DC
x
x
x
Alarm Types
Low Fan Speed/Fan Failure
x
x
High Temperature
x
x
The
X5
option provides both a visual and external alarm for fan failure or low fan speed. The visual alarm is provided
by L.E.D.s corresponding to individual fans. The external alarm is provided by relay contact connection on the rear
mounted terminal block for a remote warning device.
For
X7
option provides variable speed fan control based on temperature. High temperature alarm relay contacts are
provided by way of a rear mounted terminal block for a remote warning device.
The
X6
option incorporates both the X5 and X7 options.
Isolated OR’d Alarm Outputs (Rear of Unit) - (X5 and X6 Options Only)
These optically isolated outputs provide both normally open (N.O.) and normally closed (N.C.) alarms permitting
connection to logic circuits or other loads with no electrical connection to the control circuit.
The outputs are from a Dual-Pole MOS Relay, which are intended to drive heavy loads. These outputs have a
maximum on-state resistance of 50 Ohms, maximum sinking current is 100 mA, and a maximum of 230 VAC can
be applied to the alarm terminals. The outputs also trigger in the event of cooling system power failure.
Note: At power-up, all outputs are held in the normal state for ten seconds.
Circuit
Above Trigger Speed Below Trigger Speed
Power Removed
1.
NC
Closed
Open
Open
2.
NO
Open
Closed
Closed
Alarm Logic Table
