Data Sheet for Product

Technical Specification Sheet
Document No. 154-115
November 27, 2012
Siemens Industry, Inc. Page 1 of 2
GAMMA
Temperature Controller UP 252
Description
The Temperature Controller UP 252 can be used as
either a two-step controller (thermostat) or as a
continuous controller (P, PI controller) for pure heating
or pure cooling mode or for combined heating and
cooling operation.
The application program compares the actual
temperature measured by the Temperature Controller
UP 252 with the required setpoint temperature and
calculates the relevant control variable. This control
variable is then either transmitted as a switching
command (ON/OFF) to switch actuators (such as the
Switching/Dimming Actuator N 526E02) to control
electro-thermal valve drives in two-step control, or as a
positioning command (0 to 100 %) for controlling a
motor-driven valve drive in continuous control.
The clear and self-explanatory operator interface
contains five LEDs for displaying the current operating
state, a presence button for toggling between comfort
and standby mode, as well as a rotary button for
adjusting the basic setpoint.
The Temperature Controller UP 252 and a DELTA
frame are mounted together on a BCU. The
Temperature Controller UP 252 can only function in
combination with a Bus Coupling Unit UP 110/03 that
contains an application program. That is, the final
installation consists of the hardware (Temperature
Controller UP 252 with Bus Coupling Unit UP 110/03)
and the application program (software).
Bus Coupling Unit UP 110/03 and the frame are not
supplied with the device and must be ordered
separately.
Using ETS (Engineering Tool Software), the
application program is selected, its parameters and
addresses are assigned, and the program is
downloaded to the Temperature Controller UP 252.
Application Program
11 S1 Temperature Control 210B04
• Heating, cooling, and mixed heating and cooling
modes with direct action or reverse action.
• Setpoint is adjustable through a parameter setting
and/or through the bus.
• Parameters for setpoints, convenience
temperature adjustments, measured ambient
temperature, and control type are available.
• Convenience/standby modes can be selected
using the device's push button and/or through the
bus.
• Off-peak reduction, frost/heat protection, and dew-
point alarm modes can be set or activated through
the bus.
• Setpoint, actual temperature, and operating state
(controller state) can be read through the bus.
• Switching between heating and cooling modes
provided.