Data Sheet for Product

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Siemens Climatix controller POL424.70/STD A6V10421228_en--_c
Smart Infrastructure 2021-09-10
Interfaces
Based on KNX TP1
Bus connection CE+, CE-, not interchangeable
Bus electronics Galvanic isolated
Bus load Max. 5 mA
Bus cable Must be shielded; Please refer to
KNX manual - System Specifications
Bus cable length between 2 nodes Max. 350 m
Total length of bus cable Max. 700 m
DPSU 40 mA rated current
RS485 (EIA
-
485)
1 interface on terminal T5
Bus connection A+, B-, REF
Bus protocols Modbus RTU mode or BACnet MSTP
Bus electronics Not galvanic isolated
Bus cable Shielded twisted pair (like AWG 24)
Bus polarization Switchable by software (680 Ω)
Baud rate 600, 1200, 2400, 4800, 9600, 19200, 38400
Bus termination None (require external termination, e.g. 150 )*
*It is essential to use a network termination on each end of the RS485 network,
which matches the cable’s impedance to prevent signal reflections and corrupting
the data on RS485 network.
Cable connection RJ45 jack, 8 pins, length of cable<3 m
Local
-
HMI
RS-485 (EIA-485) Not galvanic isolated
Bus polarization 680  / 680 
Bus termination 120  / 1 nF
Supply voltage DC 24 V, Max. 100 mA
(short-circuit protected)
Tool
USB Use PC service cable POL0C2 for tools
Process bus
CE+, CE- (T6)
Third-party bus
(RS-485 Modbus RTU
or BACnet MSTP)
A+, B-, REF (T5)
Note:
Tools / HMI
Local service interface
(T-HI)