1-channel BACnet MS/TP interface RS485, D-sub connection EL6861
Status LEDs
Serial interface
Top view
extended temperature range

EL6861 | 1-channel BACnet MS/TP interface RS485, D-sub connection

The EL6861 serial interface enables the connection of BACnet MS/TP devices (Master-Slave/Token-Passing) via an RS485 interface. Up to 32 MS/TP devices (up to 64 if ultra-low power transceivers are used) can be connected. Use the EL6861 interface only in combination with TwinCAT and CX9020 or higher, since the BACnet MS/TP driver integrated in TwinCAT implements the communication via the MS/TP protocol (BACnet Revision 12). The configuration is also done in TwinCAT.

The RS485 interface guarantees high immunity to interference through electrically isolated signal transmission. The EL6861 provides 1 x 5 V DC at 20 mA (electrically isolated, short-circuit-proof) from the E-bus supply for use with the bias resistors (network bias).

The following devices can be typically connected to the EL6861:

 

Technical data EL6861
Technology D-sub, 9-pin
Devices 32, up to 64 if ultra-low power transceivers are used
Data transfer channels 1
Data transfer rates 9600, 19,200, 38,400, 57,600, 76,800 and 115,200 baud (default: 9600 baud)
Interfaces 1 x RS485
Termination resistor externally via ZB3100 or ZS1031-3000 connector
Bias resistor (network bias) externally via ZB3100 or ZS1031-3000 connector
Cable length max. 500 m twisted pair
Providing external supply 1 x max. 5 V/20 mA, out of E-Bus supply, short-circuit-proof
Power supply via the E-bus
Distributed clocks
Electrical isolation 500 V (E-bus/signal voltage)
Bit width in the process image 128 x 8 bit input, 128 x 8 bit output, 16 bit control, 16 bit status
Configuration configuration via controller, TwinCAT
Current consumption power contacts
Current consumption E-bus typ. 170 mA
Special features can only be used with TwinCAT
Weight approx. 55 g
Operating/storage temperature -25…+60 °C/-40…+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
Approvals CE