Single-Room Temperature Controller ER-04U

The ER-04U Single-Room Temperature Controller ensures temperature management for a wide range of room requirements.

Quick Facts

  • Connection for temperature sensor (e.g. TF-L)
  • Output for controlling actuators
  • Temperature Management
  • Single-room control
  • Heating radiators
  • Cooling ceilings

The ER-04U Single-Room Temperature Controller ensures temperature management for a wide range of room requirements. Economic energy utilisation of radiator heating systems and underfloor heating is achieved by demand-oriented control for each room. The communication-capable controllers can be easily integrated into higher-level ISYGLT-BUS systems for building automation. The programming and configuration of the controller is done in a very comfortable way with our programming software ProgramDesigner. In the communication network with the primary system, the controllers ensure that only as much energy as necessary is processed.

Heating radiators, cooling ceilings etc. are controlled by thermal, magnetic or electromotive actuators. The logical links, e.g. with presence sensors, window contacts, higher-level energy blocking by the house technician or by time switching, are implemented in the Master Module of the ISYGLT BUS system.

The Single-Room Temperature Controller was designed for flush-mounting and has no operating or display elements. The temperature measurement is performed by external temperature sensors such as TF-A, TF-A-20m, TF-E-02, TF-E-02-20m, TF-L. Thus the integration into any switch programs and devices is possible. When installing the temperature sensor, a sensible location that is freely supplied with room air and a measuring height of approx. 1.4 m from the floor must be observed. Please also note that no walls or objects radiating heat or cold influence the sensor.

Single-Room Temperature Controller ON/OFF (energy lockout via the ISYGLT-BUS system)

The energy lockout is used to switch the controller into the energy-saving mode during a prolonged absence. Only as much energy is consumed to maintain the target temperature for frost protection. The setpoint temperature for frost protection can be freely parameterised. The "energy lock" mode is signalled by the fact that all LEDs on the room controller are dark.

ON: All operating modes adjustable
OFF: All operating mode LEDs are dark. Setpoint temperature corresponds to setting for frost protection (freely parameterisable), the BUS LED blinks.

Day mode

In the "Day mode" operating mode, the set temperatures for HEATING and COOLING are active. A further subdivision into "Present", "Absent" and "Remote operation" is possible. The setpoint temperature for "Day mode and present" (comfort setpoint temperature) and "Day mode and absent" (day setpoint value) can be freely parameterised. In remote operation, the target temperature can be optionally set for each room via the ISYGLT-BUS system using the "RAUMREG" command.

Night mode

In the "Night mode" operating mode, the set temperatures for HEATING and COOLING are active. A further subdivision into "Present", "Absent" and "Remote operation" is possible. The setpoint temperature for "Night mode and Present" (comfort setpoint temperature) and "Night mode and Absent" (night setpoint value) can be freely parameterised. In remote operation, the target temperature can optionally be set for each room via the ISYGLT-BUS system using the RAUMREG command.

Frost protection

The "Frost protection" operating mode is active when the individual room temperature controller is switched off via the ISYGLT-BUS system, the window contact is active, or a room temperature is detected that is lower than the set "Frost protection" setpoint. The temperature for "Frost protection" can be freely parameterised.

Dew point alarm

The dew point alarm is only effective in conjunction with the "Cooling" operating mode. It is activated by a dew point sensor on the ISYGLT-BUS system.

Remote mode

The room temperature controllers can be selected via the ISYGLT-BUS system. The ACTUAL temperature can be called up via the ISYGLT-BUS system, the SET temperature specified and the control signal for the valve specified by the room temperature controller. On request, all functions of the room temperature controller can be called up and controlled via the ISYGLT-BUS system.

Comfort input (ext. button or presence detector via BUS)

Please note in the following that either a comfort button or a presence detector can be connected. Software is used to parameterise whether a button or a sensor has been connected. Both together is not possible. The button controls the change between "Comfort temperature" and "Day or night operation". Each new button press cancels the previous status. This gives the room user the option of choosing between two different setpoint temperatures. The target temperatures can be freely parameterised for both operating modes. If the ISYGLT-BUS system is switched to night mode during the "Day and Present" operating mode (comfort temperature), the controller switches to the "Night and Absent" operating mode. If the ISYGLT-BUS system changes back to the "Day" operating mode, the controller remains in the "Absent" operating mode. The operating modes can be set from the ISYGLT-BUS system via the BUS and can be confirmed. It is possible to set an operating mode via the ISYGLT-BUS system and then to lock the button to prevent manipulation in schools, etc. It is also possible to switch a room to another operating mode via the ISYGLT-BUS system and then leave the rest of the process to the room user via the button on the controller. The function is freely programmable and can be adapted to individual requirements.

The function of the comfort button depends on the operating mode:

Day mode and presence sensor locked:
Change between operating mode "Present" and "Absent" (change between two freely parameterisable set temperatures)

Control via the ISYGLT-BUS system:
From "Day mode+Absent" to "Night mode+Absent"
From "Night mode+Absent" to "Day mode+Absent“

Night mode and presence sensor locked:
The presence button has a veto function. Press to toggle between "Absent" and "Present" (1...255min). The controller then automatically returns to "Absent". The veto function can be repeated as often as required.

Control via the ISYGLT BUS system:
From "Day mode+Absent" to "Night mode+Absent"
From "Night mode+Absent" to "Day mode+Absent"

Day mode and presence sensor enabled:
Switch between "Present" and "Absent".

Presence detector activates the "Present" operating mode when "Absent" is selected. When leaving the room and pressing the presence button, the presence detector is blocked for 1...255sec in order not to reactivate the "Present" operating mode.

Control via the ISYGLT BUS system:
From "Day mode+Absent" to "Night mode+Absent"
From "Night mode+Absent" to "Day mode+Absent"

Night mode and presence sensor enabled:
Switch between "Present" and "Absent".

Presence detector activates the "Present" operating mode when "Absent" is selected. After the parameterizable time of 1...255min has elapsed, the system automatically switches to the "Absent" operating mode (retriggerable).

Control via the ISYGLT BUS system:
From "Day mode+Absent" to "Night mode+Absent"
From "Night mode+Absent" to "Day mode+Absent"

Electrical Data

Operating voltage 12-35V DC
Current consumption max. 30mA at 24V (without load on the outputs)
Switching output transistor output (PNP) max. Ub-2V / 0.5A
Alignment of actual value temperature ± 3K (via parameterisation software)
Measuring element external semiconductor sensor calibrated ± 0.5K
Subnet (RS-485) max. 5.6V limitation by Z-diodes
Connection pluggable screw terminals 1.5mm²
Operating temperature 0...+50°C
Storage temperature -25...+70°C
Humidity 0...85 % r.h. non-condensing
Protection IP20

Design, Dimensions, Weight

Design encapsulated in yellow plastic cap for installation in boxes or external devices
Dimensions DxH 50x18mm
Weight 40g

Ordering Data and Conformity

Type designation ER-04U
Article no. 80080135
Make ISYGLT
Conformity CE

Tender Documents

Instruction Manuals

Wiring Diagrams

DIP switch

8-pole DIP switch for setting the ISYGLT BUS address (0-127) on the module.


Function Indicators (LEDs on the Module)

LEDDesignationStateMeaning
yellowBUSOffNo operating voltage
OnError BUS. The controller operates independently of the ISYGLT-BUS system. Always in day mode, as no time information is transmitted.
blinkingInterference-free data transmission via the BUS line

Parameterisation with ProgramDesigner

In the ISYGLT ProgramDesigner there are further parameterisation possibilities:

  • Target temperatures (Day/Night/Comfort)
  • Protective temperature
  • Compensation
  • Valve control
  • Times
  • Special features

One of the following functions can be output at the digital output by parameterisation:

  • Digital output from Master
  • Output for radiator heater
  • Output for underfloor heating
  • Output for cooling unit
  • Load capacity: max. Ub-2V 500mA continuous load

Pin Assignment

6-pole connector

+Ub Operating voltage
GND Operating voltage
BUS-A Subnet (BUS A, RS-485)
BUS-B Subnet (BUS B, RS-485 )
Sensor + Connection sensor + (against GND)
Output Connection actuator (against GND)

Temperature Correction

A calibrated semiconductor sensor is used as the temperature sensor. If the room controller is installed at a location that does not have the same temperature as the occupied zone, the setpoint can be adjusted again using the parameterisation software (ProgramDesigner). Thus temperature gradients in the room can be compensated.

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ER-04U

Article no.: 80080135

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