DMX master/slave EL6851
RxD LED
TxD LED 
Run LED 
DMX+
Termination
GND
Shield
DMX-
Termination
GND
Shield
Top view 
Contact assembly 
extended shock and vibration range

EL6851 | DMX master/slave

In addition, the RDM (Remote Device Management) protocol can be run via the EL6851. RDM is an extension of the DMX protocol and enables addressing and parameterisation of devices. TwinCAT offers associated libraries.

The EL6851-0010 EtherCAT Terminal is a DMX slave terminal. The DMX slave terminal can receive up to 512 bytes of data. The start address and the data length can be set via the CoE (CAN application protocol over EtherCAT) objects. The RS485 interface in the EL6851-0010 is electrically isolated and guarantees high interference immunity.

The DMX slave receives data from a DMX master and transmits them to the application via EtherCAT. In this way, non-DMX-capable devices, like DALI lamps or dimmer terminals, can also be addressed.

DMX is based on RS485 physics. An integrated termination resistor can be connected through two-wire jumpers in the terminal.

Technical data EL6851 EL6851-0010
Technology DMX master terminal DMX slave terminal
Data transfer channels RS485 physics/half duplex
Data transfer rates 250 kbit, one start bit, two stop bits
Interfaces RS485, termination resistor can be switched, half duplex
Bus device max. 32 without repeater
Line impedance 120 Ω
Power supply via the E-bus
Distributed clocks
Electrical isolation 500 V (E-bus/signal voltage)
Protocol DMX512
Bit width in the process image variable
Configuration no address setting, configuration via PLC
Current consumption power contacts
Current consumption E-bus typ. 130 mA
Special features supports RDM protocol, library available; electrically isolated start address and data length can be set
Weight approx. 55 g
Operating/storage temperature 0…+55 °C/-25…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/variable
System  
subsystem For further subsystem products please see the system overview.