VMBDMI Dimmer for resistive and inductive loads
CONTENTS CONTENTS ............................................................................................................................... 2 DESCRIPTION........................................................................................................................... 3 PROPERTIES ............................................................................................................................ 3 VELBUS CHARACTERISTICS .................................................................
DESCRIPTION With this module it is possible to dim lamps operating on mains voltage. Also suitable for dimming low voltage lamps in combination with a wire-wound iron core transformer. PROPERTIES Use: Required mains voltage: 220...
Operation: Local operation on the module (on/off when short push, dimming when push and hold) Via Velbus commands or pushbuttons connected to the Velbus system Various operation functions: o Momentary o Off or slowly off o On or slowly on o On/off or slowly on.
VELBUS CHARACTERISTICS 2-wire communication for Velbus data + 2 wires for power supply Data transmission rate: 16.6 Kbit/s Serial data protocol: CAN (Controller Area Network) Short circuit protected (both towards ‘+’ and ‘-‘ of the power supply) Bus error indication: 2 short flashes of the indicator LEDs Self repairing after 25 seconds when a bus fault occurs Each dimmer can be given a name of up to 16 characters (max.).
OVERVIEW 2 1 8 5 7 6 3 4 Connections 1 2 3 4 6 mains voltage Load Velbus power supply Velbus LED indications 5 6 7 8 Power supply Receiving Velbus data Sending Velbus data Output status VMBDMI Dimmer manual – edition 1
LED INDICATIONS ON-LED: On when power supply is present Output LED: Off: load (lamp) is off On: desired dimming value is reached Fast flash: dimming value changes Slow flash: switch-off delay is running Two short flashes: communication error Three short flashes: non-dimmable load Four short flashes: temperature alarm Five short flashes: thermal protection Rx-LED: On when receiving Velbusdata Tx-LED: On when sending Velbusdata VMBDMI Dimmer manual – edition 1 7
LOCAL OPERATION Remove top cover.
USE This module can be used to dim dimmable mains voltage lamps or low voltage lamps in combination with a dimmable iron core transformer. The module is added to the Velbus system and controlled via the control panel VMB4PD or via pushbuttons connected to a pushbutton interface VMB8PB. To connect the Velbus modules with each other, a twisted pair cable is recommended (EIB 2x2x0.8mm², UTP 4x2x0.51mm² - CAT5 or equivalent).
Connection scheme with low voltage lamps Use a dimmable iron core transformer or an electronic transformer that can be dimmed using leading edge phase control. Attention: At higher output power the dimmer housing becomes hot. It is strongly recommended to keep sufficient free space around the dimmer to allow adequate ventilation.
Terminator Remove top cover. Terminat In normal circumstances only 2 ‘TERM’ terminators must be foreseen in a complete Velbus installation. Usually this will be on one module inside the distribution box and on the module the furthest from the distribution box. In all other cases it must be removed. Remark: In a wiring scheme with a lot of branches a terminator is placed on a module inside the distribution box and on the control panel furthest from the distribution box.
Configuration This dimmer module can only be configured using the VelbusLink software. The address, dimmer mode and control functions can be configured. Address: Every module in the Velbus system must have a unique address. Address setting is done by software. Dimmer mode: The dimmer defaults to inductive loads. It will switch off when the load is to inductive. When using dimmable LED lamps it is recommended to disable this protection by setting the dimmer mode to resistive loads.
18 Start/stop timer with slow on/off A push will slowly switch on the light. After expiration of the switch-off time, the light slowly turns off. Another push will the light is on will slowly switch off the light. 19 Resettable timer A push will switch on the light during a preset time. Another push while the light is on will restart the timer. 20 Resettable timer with slow on/off A push will slowly switch on the light. After expiration of the switch-off time, the light slowly turns off.
34 Multiple position dimmer A push will select the next preferred lighting brightness from a table. The time required to reach this setting and the switch-off time can be configured. Up to 14 preferred lighting brightness’s can be stored in the table. Factory defaults are: 25, 50, 75, 100, 75, 50 en 25%. 35 Forced off when switch closed As long as the switch is closed, the light can not be switched on. 36 Forced off when switch open As long as the switch is open, the light can not be switched on.
For some functions, a switch-off time can be set between: o 1 sec and 2 min, increment 1 sec o 2 min and 5 min, increment 15 sec o 5 min and 30 min, increment 30 sec o 30 min and 1 hour, increment 1 min o 1 hour and 5 hours, increment 15 min o 5 hours and 10 hours, increment 30 min o 10 hours and 24 hours, increment 1 hour o 2 days o 3 days o No switch-off time And a dimming speed can be set: o 2 sec to 2 min, increment 1 sec o 2 min to 5 min, increment 15 sec o 5 min to 30 min, increment 30 sec o 30 min to
PROBLEM SOLVING The dimmer has an indication LED. This LED indicates a fault condition by a number of light flashes. Output LED Two short flashes: communication error Three short flashes: non-dimmable load Four short flashes: temperature alarm Five short flashes: thermal protection Communication error The LED flashes 2 times briefly. Check the bus-wiring for interruptions and reversing of the ‘L’ and ‘H’ terminals. Check the number of terminators (TERM) in the installation.
Temperature protection The LED flashes 5 times briefly. When the internal temperature is higher than 90°C the dimmer will switch itself off. Temperature has to drop below 60°C to become operational again.
VERIFY SOFTWARE VERSION The software version can be retrieved via the Velbuslink software. Via the link http://www.velbus.eu you can verify whether your version is up-to-date. When a more recent version is available, download and install it. Connect the Velbus interface to a PC, run the upgrade-software and follow the instructions on the screen. Remark: Upgrading a module is not entirely without risk. Never interrupt the process.
Refer to our website for more information: www.velbus.
