TDC-100 Series
AC Digital High-Resolution Controller
Installation & Maintenance Manual
6
07/24/20
www.atcontrols.com
IOM08032 REVISION 01
Upon selecting the CLOSE function, the TDC-100 will
begin moving the actuator to the previously set
closed
position; it is not necessary to make an adjustment if the
unit has been previously set to the desired position. A
command signal input of 0V, 1V, 4mA, or 0% automatical-
ly corresponds to the defined
closed
position.
OPEN
The OPEN function works the same way as the CLOSE
function with the exception that the adjust buttons are
used to set the desired
open
position. As with the CLOSE
function, upon selecting the OPEN function, the actuator
will move to the previously set
open
position. Once the
desired position is set, the TDC-100 will automatically
correspond a command signal input of 10V, 5V, 20mA, or
100% to the
open
position.
AUX CLOSE OUTPUT
The AUX CLOSE OUTPUT function is used to set an
optional output setting that is associated with the
closed
position - an appropriate relay option module is required
to use this output. The adjust buttons are used to set the
actuator to a desired position. Whenever the actuator
position falls between the defined
closed
position and the
Aux Close position, the Aux Close Output indicator will
flash. Additionally, the TDC-100 will turn on a relay output
on the optional relay module - the output can be used to
drive an alarm or merely act as an auxiliary limit switch.
Upon selecting the AUX CLOSE OUTPUT function, the
TDC-100 will begin moving the actuator to the previously
set position. It is not necessary to make an adjustment if
the unit has been previously set to the desired position.
AUX OPEN OUTPUT
The AUX OPEN OUTPUT function is used to set an
optional output setting that is associated with the
open
position - an appropriate relay option module is required
to use this output. The adjust buttons are used to set the
actuator to a desired position. Whenever the actuator
position falls between the defined
open
position and the
Aux Open position, the Aux Open Output indicator will
flash. Additionally, the TDC-100 will turn on a relay output
on the optional relay module - the output can be used to
drive an alarm or merely act as an auxiliary limit switch.
Upon selecting the AUX OPEN OUTPUT function, the
TDC-100 will begin moving the actuator to the previously
set position. It is not necessary to make an adjustment if
the unit has been previously set to the desired position.
COMAND TYPE
The COMMAND TYPE function is used to configure the
command signal input for either 4-20mA, 1-5V, 0-5V, 0-
10V, 2-10V, or digital so as to match the type of command
signal being used. Upon selecting the COMMAND TYPE
function, the Command Input indicator will turn on steady,
while the indicator for the selected type will flash. Use the
adjust buttons (▲ or ▼) to select the desired input type.
The selection will be saved when the MODE button is
pressed, which will also advance the unit to the LOSS OF
COMMAND function.
LOSS OF COMMAND
When using 1-5V, 2-10V, 4-20mA, or a Digital input type
for the command signal, the TDC-100 will detect when the
command signal is lost or out of range. A loss of
command condition is detected whenever the input is
disconnected, the input becomes less than 0.75V (for 1-
5V input), 1.5V (for 2-10V input) or 3mA, or the input is
connected backwards. An out of range condition is
detected whenever the input becomes greater than 5.25V
(for 1-5V input), 10.5V (for 2-10V input) or 21mA. If the
TDC-100 detects a loss of the command signal, a fault will
be indicated (see FAULT INDICATORS), and the actuator
will be moved to one of three preset positions: the
open
position, the
closed
position, or the position last attained
prior to losing the command signal. The LOSS OF
COMMAND function is used to set the desired default
position.
When the LOSS OF COMMAND function is selected, the
adjust buttons are used to set the default position. The
TDC-100 indicates the selected default setting by flashing
the Open function indicator for the
open
default position,
or it will flash the Close function indicator for the
closed
default position. When neither indicator is on, then the
"last position" default is selected.
When a 0-5V or 0-10V command signal is used, a loss of
command signal cannot be detected. Therefore, if the
unit is configured for a 0-5V or 0-10V command signal
(see COMMAND INPUT), the MODE button will not select
the LOSS OF COMMAND function. However, the TDC-
100 can detect when a 0-5V or 0-10V command signal is
out of range (i.e., greater than 5.25V or greater than
10.5V) or connected backwards. When an out of range
condition is detected for a 0-5V or 0-10V input, the motor
is turned off (leaving the actuator in its “last position”) and
a fault will be indicated (see FAULT INDICATORS).
