Control Unit With Rs485 Bus Mode - Siemens CKA4820 Betriebsanleitung

System Design
5.5.1

Control Unit with RS485 Bus Mode

76
Siemens Building Technologies
Fire Safety & Security Products
Up to 30 domes, cameras or DCU modules can be directly controlled via the
telemetry interface COM2. With this system configuration, all devices must be from
the same manufacturer and of the same type.
DOME 1
Fig. 17 SIEMENS dome systems
Required accessories
RS485 cable: 2-core twisted; max. permissible length 1.2 km with 0.8 mm
conductor diameter.
9-pin Sub-D plug with housing.
The power supply to the control unit is from a separate power supply unit.
Before connecting the telemetry devices, please refer to the information in the respective Instruction
Manuals.
Required settings (SW301) for use of COM2 output as RS485 interface
OFF
1 3
Parameter menu
-> Interface adjustment
Fig. 18 Example: setting of connection of telemetry devices (SIVIS DOME or
CCDA DOME) to COM2
DOME 2 DOME 3
RS485
COM2 COM1B
5 6 8
Interface adjustment
-> Mode COM2 ->
DOME 4 DOME 5
12 V
200 mA
COM1A
Power
supply unit
SIVIS DOME
SIVIS DOME
CCDA DOME
CCDA DOME
Reserved-1
Reserved-2
SCU
01.2005