Bosch SSB1000 TL - Building Management System (BMS) Registers; Modbus Configuration for BMS

SSB 6720892984 (2019/02) US
Service reminder | 75
Appendix M - Building Management System (BMS) Registers Specications
The system is designed to be a cascade of (1..2) burners (modules) which form a stand-alone boiler.
This stand-alone boiler has a Modbus and cascade bus interface so that up to 4 boilers can be cascaded.
On the BMS side the boilers (1..4) all have their own Modbus dependent address so that the BMS bus can be connected to all boilers.
Single boiler containing up to 2 modules/burners
BMS bus
Cascade bus
Module / burner 1
Touch Screen
RS485
RS232
Module / burner 2
Demand: 0-10V / OpenTherm / On-Off
T outside
System sensor D2 is
Cascade system sensor
Boiler sensor
J6 J8 Iso + Power
S1 = on
J8
S1 = off
MANAGING
BOILER
Boiler sensor
J6 J8 Iso
S1 = off
J8
DEPENDENT
BMS bus
S1 = off
BOILER
Max. 4 boilers
90xMN -
900PBTouch Screen
Power Supply
Max. 2 burners or modules
90xMN –
–
–
D2
900PB
Max. 2 burners or modules
RS485
RS232
Power Supply
Touch Screen
RS485
RS232
90xMN D1
Boiler manager
90xMN –
–
–
D2
90xMN D1
Boiler manager