MDT Technologies SCN-RTC20.02 Technical Manual
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MDT Technologies SCN-RTC20.02 Technical Manual

Knx time switch
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Technical Manual
State 05/2024 - Version 1.1
KNX Time Switch
SCN-RTC20.02
Further Documents:
Datasheet:
https://www.mdt.de/EN_Downloads_Datasheets.html
Assembly and Operation Instructions:
https://www.mdt.de/EN_Downloads_Instructions.html
Solution Proposals for MDT products:
https://www.mdt.de/en/for-professionals/tips-tricks.html
MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany
Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de

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Summary of Contents for MDT Technologies SCN-RTC20.02

  • Page 1 State 05/2024 - Version 1.1 KNX Time Switch SCN-RTC20.02 Further Documents: Datasheet: https://www.mdt.de/EN_Downloads_Datasheets.html Assembly and Operation Instructions: https://www.mdt.de/EN_Downloads_Instructions.html Solution Proposals for MDT products: https://www.mdt.de/en/for-professionals/tips-tricks.html MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...

  • Page 2: Table Of Contents

    4.5.4.4 Send values cyclically ......................42 4.5.4.5 Other behaviour ........................44 4.6 Logic ...............................45 5 Operating via the buttons on the device ..................47 MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 2 / 54...
  • Page 3 6.2 List of tables ............................53 7 Appendix ............................54 7.1 Legal provisions .............................54 7.2 Disposal ..............................54 7.3 Assembly ...............................54 7.4 History ..............................54 MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 3 / 54...

  • Page 4: Overview

    This manual refers to the following devices (order number in bold). SCN-RTC20.02 Time Switch 20-channel with colour display ■ MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 4 / 54...

  • Page 5: Functions

    The catching up of the switching times on restart, time change and unlocking can be set separately for each channel. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...
  • Page 6 The MDT Time Switch supports “long frames” (longer telegrams). These contain more user data per telegram, which significantly reduces the programming time of the actuators with the ETS. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...

  • Page 7: Wiring Diagram

    KNX Time Switch [SCN-RTC20.02] 2.3 Wiring diagram The following figure shows an exemplary wiring diagram: Figure 1: Wiring diagram MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 7 / 54...

  • Page 8: Structure & Handling

    5. Set and programme the individual address in the ETS. (Programming LED turns off) 6. Configure and programme the settings in the application programme. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...

  • Page 9: Communication Objects

    Public holiday Activation (for external logic) 1 Bit ■ ■ Public holiday Status 1 Bit ■ ■ ■ MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 9 / 54...
  • Page 10 Status: Absolute height position 1 Byte ■ ■ ■ ■ Status: Dimming value 1 Byte ■ ■ ■ ■ MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 10 / 54...
  • Page 11 Day / Night Status: Lock 1 Bit ■ ■ ■ Table 2: Communication objects – Standard setting: Functions MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 11 / 54...
  • Page 12 The flags assign the communication objects their respective tasks in programming, where C stands for communication, R for read, W for write, T for transmit and U for update. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...

  • Page 13: Ets - Parameter

    In Operation – Output 1 Bit Sending a cyclical “In operation” telegram Table 5: Communication objects – General settings MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 13 / 54...

  • Page 14: Time And Astro Settings

    A time must be defined for the function. The time for cyclical sending of the “Slave” should be set the same as the time for cyclical sending of the “Master”. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...

  • Page 15: Astro Settings

    ■ Latitude in degrees 0° … 90° Setting the latitude. [50°] [0° - 90°] MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 15 / 54...
  • Page 16 1 byte, 2 bytes or 4 bytes in length. Important: Azimuth and elevation angle are calculated every 5 minutes and sent cyclically to the bus. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 16 / 54...

  • Page 17: Cycle Programmes And Timing Cycle

    The time switch can output a time cycle and up to 2 cycle programs. The time clock sends a 1 command cyclically (every minute/hour/day) and can be used for synchronization or for executing periodic processes. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...
  • Page 18 Cycle 2 – Start/Stop 1 Bit see cycle 1. Table 12: Communication objects – Cycle programmes and timing cycle MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 18 / 54...

  • Page 19: Display Settings

    Texts in brackets are set by default. Other [Sonstige] Central [Zentral] Table 13: Settings – Display settings MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 19 / 54...

  • Page 20: Standby Display / Display Lock With Pin-Code

    The display lock can also be activated via the display in the “Settings” - “Display lock” level menu at the device. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 20 / 54...

  • Page 21: Menu And Time Switch Functions

    Setting whether the device ■ on restart active retriggers (sends) all currently valid ■ switching states after a restart. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 21 / 54...
  • Page 22 ■ device. Table 15: Basic settings – Menu and time switch functions MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 22 / 54...
  • Page 23 Sending: 1 Public holiday active up to configured return. Automatic mode becomes active again from the next day MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 23 / 54...
  • Page 24 14 Byte Interface to VisuControl Easy II. Input/Output Table 17: Communication objects – Holiday / Public holiday MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 24 / 54...

  • Page 25: Automatic Calculation Of Public Holidays

    A list of functions appears, which can be activated individually. When a function is active, a separate sub menu appears for it. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...

  • Page 26: Identical Parameter

    ■ A function level is displayed on the device when at least one function for this level is active. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 26 / 54...

  • Page 27: Function - Switch

    Must be linked to the status of the actuator to be switched. Table 19: Communication objects – Function: Switch MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 27 / 54...

  • Page 28: Function - Send Values

    MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...
  • Page 29 DPT depends on the parameter setting. Status for “Scene” not possible. Table 21: Communication objects – Function: Send values MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 29 / 54...

  • Page 30: Function - Temperature Shift

    (in the “Time Switch” menu), which is also set to the shift via 2 Bytes. The current setpoint value sent by the controller can be shown on the display via status object. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...

  • Page 31: Function - Mode Selection

    “Settings changeable on device” is described in more detail on 4.5.3.1 Identical parameter. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 31 / 54...

  • Page 32: Function - Blinds

    Receiving the status of absolute slats Status: Absolute position of slats position. Table 26: Communication objects – Function: Blinds MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 32 / 54...

  • Page 33: Function - Shutter

    1 Byte Receiving the status of the current dimming value. Table 28: Communication objects – Function: Dimming MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 33 / 54...

  • Page 34: Function - Day/Night

    Day = 1 / Night = 0 Day = 0 / Night = 1 Table 29: Communication object – Day/Night Function MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 34 / 54...

  • Page 35: Time Switch

    For each of the 8 switching times, you can set the days of the week on which they should be active. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...
  • Page 36 MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...

  • Page 37: Lock Object Type

    Setting the value from which the “Datapoint type: threshold” lock becomes active. Only with “threshold comparator” setting. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 37 / 54...
  • Page 38 Object value => 10001 Lux => Lock active. Only with an input value of 10000 Lux - 2% (=9800 Lux) the lock is released. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...
  • Page 39 Day/Night – Status: Lock 1 Bit Sends the actual status. Table 32: Communication objects – Time Switch: Lock/Release MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 39 / 54...

  • Page 40: Holiday

    Behaviour like Sunday ■ The Time Switch only executes the switching times that are activated exclusively for “Sunday”. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 40 / 54...
  • Page 41 “Behaviour on holiday active” must be set to “Behaviour like Sunday”. This means that while “Holiday” is active, only the timers that are defined exclusively for Sunday are executed. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...

  • Page 42: Send Values Cyclically

    ...” appears. If lock and holiday are active and both are set to “Send lock and fixed value cyclically”, the text “Send value during lock + holiday cyclically every ...” appears. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 42 / 54...
  • Page 43 ■ After unlocking/end of holiday, no action is performed and the time switch remains in its current state. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 43 / 54...

  • Page 44: Other Behaviour

    Alternatively, the settings in the “Basic settings” – “Global settings” menu can be adopted. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 44 / 54...

  • Page 45: Logic

    (from HW R3.0) active inverted, with preset “1“ ■ (from HW R3.0) Table 36: Settings – Logic MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 45 / 54...
  • Page 46 Value / Percent value 1 Byte DPT corresponds to the setting Table 37: Communication objects – Logic MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 46 / 54...

  • Page 47: Operating Via The Buttons On The Device

    Use buttons 2 and 3 to select the corresponding category and press button 4 to call it up. All functions assigned to this category appear there: MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...
  • Page 48 Important: In this level, the display remains active (does not switch to standby) until you leave the level. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 48 / 54...
  • Page 49 Use buttons 2 and 3 to select the desired setting for time, holiday and reset. Press button 4 to switch to the corresponding level. Press button 1 to switch to the higher level. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...
  • Page 50 Press button 1 to reset all changes at the Time Switch and the settings made in the ETS are referred to. MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de...
  • Page 51 If holiday and “behaviour like Sunday” If public holiday and “behaviour like Sunday” Table 38: Legend – Symbols in the display MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 51 / 54...

  • Page 52: Index

    Figure 8: Identical parameter – Function level / Category ................26 Figure 9: Settings – Switching times 1-8 ......................35 MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 52 / 54...

  • Page 53: List Of Tables

    Table 36: Settings – Logic ..........................45 Table 37: Communication objects – Logic .......................46 Table 38: Legend – Symbols in the display ......................51 MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 53 / 54...

  • Page 54: Appendix

    V1.0 First version of the manual DB V2.0 04/2021 V1.1 Adaptations to new database, extension of languages DB V2.1 05/2024 MDT technologies GmbH · Papiermühle 1 · 51766 Engelskirchen · Germany Telephone: +49 (0) 2263 880 · knx@mdt.de · www.mdt.de 54 / 54...

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