T775 SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
13
63-7147—3
Damper or Valve Modulation – T775M or
T775R
Application Description
In this example, a T775M is controlling an actuator, based on
temperature input, to modulate a damper or valve.
Sensor Designation
This device application requires one sensor.
• Sensor A is sensing outside temperature
NOTE: Sensor A or Sensor B can be used in this
application.
Programming Example
Program in Setup for:
— Modulating Output (MOD) 1:
Type = 2-10V (or whatever output signal is preferred)
Minimum Output % = 0% (range is 0-100%)
Modulating Output 1:Enable actuator circuit
Program for:
— Setpoint = 120° F (49° C)
— Throttling Range = 10° F (-12° C)
— Sensor = Sensor A
— Heat or Cool
IMPORTANT
After the desired value is selected, be sure to press
the
#
or
$
or
HOME
button in order to save that
value in the controller’s memory.
Wiring
See Figures 8-9 for wiring connections for the T775M with
examples of an MS75xx actuator and an ML7425 valve
actuator.
Fig. 8. T775M Wiring - Damper Modulation
(2-10 Vdc shown).
Fig. 9. T775M Wiring - Valve Modulation (2-10 Vdc shown).
M24881A
MS75xx
SPRING RETURN
DIRECT COUPLED ACTUATOR (DCA)
L1
(HOT)
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
1
1
SENSOR A
T
T
C
S
V
B
R
W
+
–
MOD 1
1
2
3
5
4
T775M
WIRING
STRIP
M28042
ML7425
SPRING RETURN
VALVE
ACTUATOR
WIRING
STRIP
F
+
T2
T1
O1
O2
TS
–
L1
(HOT)
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
1
1
SENSOR A
T
T
C
S
V
B
R
W
+
–
MOD 1
T775M
