The BMOS 3000 in detail
The concept
The central idea behind the BMOS 3000 is to have a unit that converts analogue signals to digital ones. This should be done as near as possible to the location where the signals are generated, i.e. directly at the battery. The resulting benefits of this are:
- Maximum degree of electrical safety
- Extremely low susceptibility to disturbances
- Considerable reduction in installation times and costs
- Reduced service costs
- Maximum flexibility
- Central monitoring of different battery systems
Functional principle
The BMOS 3000 employs fibre optic cable technology and comprises four main components:
- Central processing unit
- Fibre optic hub
- Measuring modules
- Power supply (POE or plug-in power unit)
Every battery or battery block is fitted with a measuring module for recording measurements. Each measuring module is connected to a fibre optic hub by a fibre optic cable. The advantage: Measuring modules are electrically isolated from the fibre optic hubs and the central processing unit.
Central processing unit
Each central processor in the BMOS 3000 controls up to ten hubs, with each hub enabling connections to up to 32 measuring modules. This means that up to 320 measuring modules per central unit can be easily and reliably monitored. The bus is generally connected to the hubs through installation tubes. A cable duct is only required directly beneath the central processor.
Features of the central processing unit
- LAN connection for remote querying of data and fault reports
- Optically isolated USB connection (PC) for data configuration and querying
- Two potential-free contacts for sending fault report signals to the building control system
- SNMP trap for reporting faults to the building control system or the operating personnel
- E-mail alarm via SMTP
- Internal SSD for recording events
Requirements to be met on site
- Power socket (alternatively: POE) with secured current supply
- Network connection
- Fault signal line to the building control system
Actions in the event of a fault
In the event of a fault, the potential-free contact sends a fault signal to the building control system. In addition, an SNMP trap can be triggered and an e-mail alarm transmitted via SMTP. The battery measurement data can be quickly and simply queried for fault analysis through the LAN interface.
Maximum electrical safety
Since the system provides electrical isolation at the measurement location, the BMOS 3000 is able to offer a high degree of security.
Minimum susceptibility to faults
The atmosphere in a battery chamber is subject to very strong electromagnetic fields. Measuring lines transporting analogue signals are therefore susceptible to considerable stray pick-up, which can affect the measurement results. The digital fibre optic design of the BMOS 3000 results in a significantly higher resistance to such disturbance.
Full configurability
The BMOS 3000 is fully configurable, which is completely unique for this type of instrument. Each measuring module of a battery block can be parametrised separately, enabling mixed monitoring of blocks with different nominal voltages and of different ages.
This is particularly important in systems in which several defective batteries must be replaced over a period of time. As new batteries display different behaviour to their predecessors in terms of voltage, the BMOS 3000 enables individual specification of the limit values to be monitored.
Software
The BMOS 3000 is designed as a standalone system. Optionally, it can also be used in conjunction with software (Excel) that enables block voltages to be controlled directly by computer/laptop (both locally and via LAN).