User Manual

Interfaces
Based on KNX TP1
(Assembled in POL422.70, POL424.70)
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 Ω)*
*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 Ω / 680 Ω
Bus termination
120 Ω / 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)
18 / 24
A6V10421228_en--_b Climatix controllers POL42X.70/STD Siemens
2016-04-07 Building Technologies