Table of Contents
Advertisement
ABB i-bus
®
KNX
Planning and application
12
Planning and application
12.1
Device application
The Uninterruptible KNX Power Supply SU/S 30.640.2 is particularly suitable for powering:
Systems requiring a highly failsafe KNX system (e.g. for safety applications or fault messages)
•
•
Systems with KNX voltage backup for up to 16 hours
Systems with fault indication and logging of fault messages in case of mains failure, battery fault,
•
overload / short circuit
12.2
Back-up supply
To bridge longer mains voltage failures, the SU/S 30.640.2 can be buffered with a 12 V lead accumulator.
The mains voltage failure backup time depends on the load connected to the KNX line and the battery
capacity.
ABB offers four different batteries with various battery capacities. The AM/S 12.1 accumulator module is a
rail-mounted unit; the SAK 7, SAK 12 and SAK 17 lead-gel accumulators can be installed in a separate
distribution board.
When the uninterruptible KNX power supply SU/S 30.640.2 (KNX bus = 640mA) is used at full capacity,
the lead gel accumulators buffer the KNX system voltage for the following mains voltage failure bridging
times:
Battery module, 12 V DC, MDRC, AM/S 12.1
Battery capacity: 1 Ah
•
•
Mains power failure backup time: 10 min.*
Sealed Lead Acid Battery SAK2
Battery capacity: 2 Ah
•
•
Mains power failure backup time: up to 0.5 h* (one SAK 2), up to 1 h*(two SAK 2 in parallel)
Sealed Lead Acid Battery SAK7
•
Battery capacity: 7 Ah
Mains power failure backup time: up to 2.5 h* (one SAK 7), up to 5 h* (two SAK 7 in parallel)
•
Sealed Lead Acid Battery SAK12
Battery capacity: 12 Ah
•
•
Mains power failure backup time: up to 5.5 h* (one SAK 12), up to 11 h* (two SAK 12 in parallel)
Sealed Lead Acid Battery SAK17
Battery capacity: 17 Ah
•
•
Mains power failure backup time: up to 8 h* (one SAK 17), up to 16 h* (two SAK 17 in parallel)
* The times are based on a battery in new condition under nominal load
SU/S 30.640.2 | 9AKK107992A4580_EN Rev. A 37
Advertisement
Table of Contents
