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Instruction Manual IM02602008E - Rev. D
Transformer Temperature Controllers
IM02602008E - Rev. D May 2019 www.eaton.com
4.2.4.1.12 Air Flow Sensing (TC-100 Only)
Select
Air Flow Sensing
. The Air Flow Sensing configuration parameters will
appear.
1. Select the air flow settings desired, as follows:
Discrete Input 1 Selectione:
Configures the use of Discrete Input 1. The
options are
Not Used
,
Fan Fail
, and
User Defined
. Fan Fail may be used
with an airflow sensor or micro switch connected to ventilation louvers to
indicate when the fan is operating properly. User Defined may be used with
a wider array of external sensors or switches to generate an alarm or trip
condition, control the fans, or even control other equipment using the Fan2
relay Default is
Not Used
.
Discrete Input 1 Edgee:
This option should only be set after the Discrete
Input 1 Selection is changed from
Not Used
. The options differ depending
on the Discrete Input 1 Selection.
For
Fan Fail
the options are
Open
or
Closed
and configure the input state
that indicates a fan failure. This allows connection to either normally closed
or normally open contacts. The default is
Open
.
For
User Defined
two options are given to define the relationship between
the input state and output state. The options are
Direct
, which means a clo-
sure on the input results in a closure on the output, or
Invert
which means
an open on the input causes a closure on the output. This allows the use
of normally open or normally closed contacts on the input. The default is
Direct
.
Discrete Input 1 Effecte:
This option should only be set after the Discrete
Input 1 Selection is changed from
Not Used
. The options differ depending
on the Discrete Input 1 Selection.
For
Fan Fail
the options are
Alarm Only
or
Alarm + Fan 2
. The default is
Alarm Only
. Selecting either option will activate an alarm condition when a
fan failure is detected, activating the alarm relay and front panel LED, and if
enabled, displaying
A. AIR-ND
(airflow not detected). The second option can
be used to configure Fan 2 as a backup to come on if FAN 1 fails.
For
User Defined
the options are
Alarm
,
Trip
,
Fan2
,
Fans ON
, and
Fans
OFF
. The default is
Alarm
. The
Fans ON
and Fans
OFF
control both fans
and override temperature setpoints, thus they can be used to always force
fans On or Off.