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An RS-485 distributor can also be used to increase the maximum number of devices on the bus as well as
the total range. Each distributor output provides another RS-485 bus. This allows each output to extend an
additional 1200m, and it also enables the additional connection of 31 further devices to each output (the
output itself represents one device).
The maximum system expandability depends on the RS-485 address range of the installed devices.
System expansion with RS-485 signal distributor
ATTENTION: Most signal distributors are unidirectional! This means that the signal only flows from the
input towards the outputs. Therefore, e.g. the interconnection of several keyboards is not possible with
these types of signal distributor!
2.4.2 RS-485 socket pin assignment
The following RS485 pin assignment as follow:
2.4.3 EKB-500 connection with network patch cable
For a simple, short distance installation, recorder and keyboard can directly be connected using a standard
CAT5 network cable (patch cable, uncrossed!).
2.4.4 EKB-500 connection to several DVRs
For long distance installations connecting several DVRs, please use signal distributor to connect
For further details on keyboard connection, please refer to the EKB-500 manual.
RS-485 port communication settings are configured in the I/O CONTROL menu ( chapter 5.10.4
System Setup: I/O - control).