Installation and Commissioning
Manual SCA-340 / SCA-340-L sysmik.de 27
LED State Description
Speed
yellow 100 Mbps
off 10 Mbps (if link is active)
Link
green electrical connection to network
short off packet transmission
permanent off no electrical connection to network
Table 3.3.7.1: Ethernet port LEDs
3.3.8 RS-485 Termination
RS-485 networks are using bus topology and are terminated at both ends with a
termination resistor. Additionally, the data lines are pulled once with bias resistors to
a defined idle state. The Scalibur has built-in resistors for termination (120 Ω) and
biasing (510 Ω) of COM1 and COM2, according to the BACnet MS/TP specification.
Each resistor can be separately activated via DIP switches.
Fig. 3.3.8.1: Assignment of DIP switches to RS-485 termination
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