3-fold twilight switch, MDRC Type: HS/S 3.1, GH Q R0001

Transcription

1 The twilight switch is a DIN rail mounted device for insertion in the distribution board. It is connected to the EIB via a bus connecting terminal. The light sensor that is supplied for recording the ambient brightness value is connected via two screw terminals. The twilight switch can send switching telegrams to EIB actuators when there is an overrange or underflow in the threshold value. Three different threshold values between 1 20,000 lux can be set using the ETS software. Technical data Power supply EIB 24 VDC, via the bus line Inputs Brightness ranges lux ,000 lux can be selected via the software Cable length 100 m Operating and display elements Red LED and push button for assigning the physical address Connections Light sensor 2 box terminals Wire range mm 2 EIB Pins for bus connecting terminal Type of protection Twilight switch IP 20 in accordance with EN Light sensor IP 54 in accordance with EN Ambient temperature range Operation of the twilight sensor - 5 C 45 C Operation of the light sensor -40 C 70 C Storage -25 C 55 C Transport -25 C 70 C Design Modular installation device, prom Housing, colour Plastic housing, grey Mounting Twilight switch on 35 mm mounting rail, DIN EN Light sensor with mounting bracket on vertical surface Dimensions Twilight switch 45 x 36 x 65.5 mm (H x W x D) Light sensor 74 x 27 x 38 mm (H x W x D) Light sensor with mounting bracket 118 x 27 x 62 mm (H x W x D) Mounting depth/width Twilight switch 68 mm / 2 modules at 18 mm Weight Twilight switch 0.08 kg Light sensor 0.04 kg Certification CE norm EIB-certified in accordance with the EMC guideline and the low voltage guideline 2-360

2 Application programs Number of Max. number of Max. number of communication objects group addresses associations Switch Threshold Channel selection / Switch Threshold / Wiring diagram 1 Programming LED and push button 3 Connecting terminals for light sensor 2 Bus connection Note The light sensor is fixed to a vertical surface with a mounting bracket as supplied. The intake for the signal cable must point downwards. When selecting the installation site, you should note the following: The maximum cable length is 100 m. A standard two-core cable can be used. Make sure that the light sensor is not in shadow. If the twilight switch is to be used for switching external lighting, the light sensor should face eastwards. If it is to be used for room lighting, it should preferably face northwards

3 Switch Threshold Channel selection/ 2 Selection in ETS2 ABB Phys. Sensors Brightness Switch The twilight switch has three 1 bit communication objects which can send On or Off telegrams when there is an overrange or underflow in the respective threshold value. It can be specified separately whether the communication object should send cyclically when there is an overrange or underflow in the threshold value. A common cyclic time is then set for all the channels. Threshold The three threshold values can be set individually in the parameters as resistance values of the light sensor. Depending on the tolerance of the light sensor, it can be necessary to correct the previously selected resistance value. The following table helps with this: Light intensity Resistance / Ohm /lux min. typ. max M 2.4M 3.0M M 2.0M 2.5M 2 1.2M 1.6M 2.0M k 1.0M 1.5M k 700.0k 1.0M k 350.0k 550.0k k 200.0k 300.0k k 130.0k 200.0k k 90.0k 120.0k k 50.0k 75.0k k 28.0k 40.0k k 20.0k 30.0k k 13.0k 20.0k k 8.5k 11.0k k 5.0k 7.5k k 2.8k 4.0k k 2.0k 3.0k k 1.2k 2.4k If the current measured value fluctuates by the set threshold value, it can lead to extremely frequent On or Off switching operations. In order to avoid this happening, a common hysteresis can be defined for all the channels. The percentage value for the hysteresis refers to the resistance value of the light sensor, in which the resolution of the twilight switch must be taken into consideration. Range 1: 1.2 kohm 40 kohm lux 100 lux Resolution: 400 Ohm Range 2: 60 kohm 2.4 MOhm 100 lux 1 lux Resolution: 20 kohm The following example serves to clarify the setting of the hysteresis: with a switching threshold of 10 kohm (corresponds to approx. 700 lux), the twilight switch detects at approx kohm that it is darker. If the hysteresis is set at 12.5%, it should detect at approx kohm that it is brighter. Due to the resolution of 40 Ohm, the actual threshold is 8.4 kohm. That corresponds to approx lux

4 Channel selection The three communication objects for the switching thresholds are disabled individually or together via object no. 3. The three least significant bits of the 1 byte communication objects are evaluated separately. The assignment of which values disable or enable which channel can be taken from the following table. If a channel is disabled, the communication object cannot send any more telegrams. If the channel is enabled, the communication object sends a telegram with its current value. Object Ch. 3 Ch. 2 Ch. 1 no. 3 0 enabled enabled enabled 1 enabled enabled disabled 2 enabled disabled enabled 3 enabled disabled disabled 4 disabled enabled enabled 5 disabled enabled disabled 6 disabled disabled enabled 7 disabled disabled disabled So that the light is not constantly activated when there are momentary fluctuations, a common time delay can be set for all the channels. There must be an overrange or underflow in the set threshold value for the duration of the time delay before the twilight switch may send a telegram. This setting applies to all the channels. Communication objects No. Type Object name Function 0 1 bit Channel 1 Switch at threshold channel bit Channel 2 Switch at threshold channel bit Channel 3 Switch at threshold channel byte Block Receive telegr. disable Parameters The default setting for the values is printed in bold type. Separate for channel 1... channel 3: Threshold value 2.0 kohm ca lux 2.4 kohm ca lux 2.4 MOhm ca. 1 lux Darker than threshold do not send a telegram send ON telegram cyclically send ON telegram cyclically Brighter than threshold do not send a telegram send ON telegram cyclically send ON telegram cyclically Common for channel 1... channel 3: Delay time ca. 10 sec. / ca. 20 sec. / ca. 30 sec. / / ca. 3 min Hysteresis ca. 25 % / ca. 12,5 % / ca. 6 % Cyclic time ca. 3 min / ca. 5 min / / ca. 60 min 2-363

5 Switch Threshold /1 Selection in ETS2 ABB Phys. Sensors Brightness With this application program, the twilight switch can carry out lightscene control with four scenes dependent on light intensity. Each scene consists of three 1 bit communication objects and one 1 byte communication object. Three threshold values distinguish the four lightscenes from each other. For determining the threshold values, the twilight switch has a common parameter Base for subsequent thresholds with which the measuring ranges 10 kohm (1 100 lux) and 200 Ohm ( lux) are selected. At the same time there is a parameter Factor for threshold... for each of the three threshold values. The three factors must be used in ascending order. Due to the characteristic curve of the sensor, increased resistance values mean decreased intensity. In order to make the setting of resistance values easier, there is a parameter Setting aid that is suitable each time for the set base and only serves for information. Depending on the tolerance of the light sensor, it can be necessary to correct the previously selected resistance value. The following table helps with this: Light intensity Resistance / Ohm /lux min. typ. max M 2.4M 3.0M M 2.0M 2.5M 2 1.2M 1.6M 2.0M k 1.0M 1.5M k 700.0k 1.0M k 350.0k 550.0k k 200.0k 300.0k k 130.0k 200.0k k 90.0k 120.0k k 50.0k 75.0k k 28.0k 40.0k k 20.0k 30.0k k 13.0k 20.0k k 8.5k 11.0k k 5.0k 7.5k k 2.8k 4.0k k 2.0k 3.0k k 1.2k 2.4k If the current measured value fluctuates by the set threshold value, it can lead to extremely frequent On or Off switching operations. In order to avoid this happening, a common hysteresis can be defined for all the channels. The percentage value for the hysteresis refers to the resistance value of the light sensor, in which the resolution of the twilight switch must be taken into consideration. Range 1: 1.2 kohm 40 kohm lux 100 lux Resolution: 400 Ohm Range 2: 60 kohm 2.4 MOhm 100 lux 1 lux Resolution: 20 kohm The following example serves to clarify the setting of the hysteresis: with a switching threshold of 10 kohm (corresponds to approx. 700 lux), the twilight switch detects at approx kohm that it is darker. If the hysteresis is set at 12.5%, it should detect at approx kohm that it is brighter. Due to the resolution of 40 Ohm, the actual threshold is 8.4 kohm. That corresponds to approx lux. So that the light is not constantly activated when there are momentary fluctuations, a common time delay can be set for all the channels. There must be an overrange or underflow in the set threshold value for the duration of the time delay before the twilight switch may send a telegram. This setting applies to all the channels. A common setting is selected for all the outputs to determine whether they send cyclically or only when the scene changes. The cyclic time can be set between 2.5 minutes and 60 minutes

6 For the four scenes Brighter than threshold 1, Between threshold 1 and 2, Between threshold 2 and 3 and Darker than threshold 3, it is possible to determine separately for the 1 bit communication objects whether they should send telegrams or not. If the output should send a telegram, the value of the communication object is set with the subsequent parameter. In the same way as for the 1 bit communication objects, it is also possible to determine for the 1 byte communication object of output 1, when it should send a telegram and which value it should use. The four communication objects for the outputs can be disabled individually or together via object no. 4. The four least significant bits of the 1 byte communication objects are evaluated separately. The assignment of which values disable or enable which output can be taken from the following table: If an output is disabled, the communication object cannot send any more telegrams. If the output is enabled, the communication object sends a telegram with its current value. Object Output 4 Output 3 Output 2 Output 1 no. 4 1 bit 1 bit 1 bit 1 byte 0 enabled enabled enabled enabled 1 enabled enabled enabled disabled 2 enabled enabled disabled enabled 3 enabled enabled disabled disabled 4 enabled disabled enabled enabled 5 enabled disabled enabled disabled 6 enabled disabled disabled enabled 7 enabled disabled disabled disabled 8 disabled enabled enabled enabled 9 disabled enabled enabled disabled 10 disabled enabled disabled enabled 11 disabled enabled disabled disabled 12 disabled disabled enabled enabled 13 disabled disabled enabled disabled 14 disabled disabled disabled enabled 15 disabled disabled disabled disabled 2-365

7 Communication objects No. Type Object name Function 0 1 byte Value object Send telegr. value 1 1 bit Switching object 1 Send telegr. switch 2 1 bit Switching object 2 Send telegr. switch 3 1 bit Switching object 3 Send telegr. switch 4 1 byte Block Receive telegr. disable Parameters The default setting for the values is printed in bold type. Switching thresholds: Base for subsequent thresholds 200 Ohm, meas. range lux 10 kohm, meas. range lux only for 10 kohm measuring range: Setting aid for base 10 kohm 1.5 lux, factor approx. 200 (only info) 2 lux, factor approx lux, factor approx. 5 only for 200 Ohm measuring range: Setting aid for base 200 Ohm 100 lux, factor approx. 250 (only info) 200 lux, factor approx lux, factor approx. 5 Factor for threshold 1 (light) 5 / / 20 / / 250 / not used Factor for threshold 2 (medium) 5 / / 150 / / 250 / not used Factor for threshold 3 (dark) 5 / / 200 / / 250 / not used Hysteresis of the thresholds ca. 25 % / ca. 12,5 % / ca. 6 % Delay time on change of threshold ca. 20 sec. / ca. 30 sec. / / ca. 4 min Sending characteristic cyclically / only on change of scene Cyclic time ca. 2.5 min / ca. 5 min / / ca. 60 min Separate for the four brightness ranges: Send to 1st switching object? do not send a telegram Telegram of 1st switching object send ON telegram Send to 2nd switching object? do not send a telegram Telegram of 2nd switching object send ON telegram Send to 3rd switching object? do not send a telegram Telegram of 3rd switching object send ON telegram Send to value object? do not send a telegram Telegram of value object send ON telegram Behaviour when disabled: Send to 1st switching object? do not send a telegram Telegram of 1st switching object send ON telegram Send to 2nd switching object? do not send a telegram Telegram of 2nd switching object send ON telegram Send to 3rd switching object? do not send a telegram Telegram of 3rd switching object send ON telegram Send to value object? do not send a telegram Telegram of value object send ON telegram 2-366

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