Marine and Offshore
The node structure must meet additional requirements to qualify for certified marine applications.
If these requirements are specific to an I/O module, they are described in the respective & Product Manual. Otherwise, the following general requirements for marine applications apply.
A filter module must be used for each system and field supply infeed point with a nominal voltage of 24 VDC:
- Use a supply filter (750-626/xxx-xxx) for the system supply.
- Use a filter module for field-side power supply (750-624/xxx-xxx) or a supply filter (750-626/xxx-xxx) for the field supply.
No additional filter module is required for field supply with a nominal value different from 24 VDC.
No filter module is required for field supply different from 24 VDC.
Marine Applications per DNV
- Class A: all areas except bridge and open deck
- Class B: all areas including bridge and open deck
Applications with Isolation Monitoring
High-isolation (HI) versions of the filter modules are required for applications with isolation monitoring.
High-Isolation Filter Modules | |
|---|---|
Field-side power supply filters | Supply filter, 24 VDC, HI (750-624/020-000) |
Filter module, 24 VDC, HI, no power jumper contacts (750-624/020-001) | |
Supply filter, 24 VDC, HI, with ground fault diagnostics (750-624/020-002) | |
Filter modules | Supply filter, 24 VDC, HI (750-626/020-000) |
Supply filter, 24 VDC, HI, with ground fault diagnostics (750-626/020-002) | |
Supply filter, 24 VDC, HI/T (750-626/025-001) | |
Example of a Power Supply Concept for Marine Applications – Classes A and B per DNV
1 | Supply filter, 24 VDC, HI GF (750-626/020-002) or |
2 | Power supply, 24 VDC (750-602) or |
3 | Filter module for field-side power supply, 24 VDC, HI GF (750-624/020-002) or |
4 | Distance module, 24 VDC / 230 VAC (750-616/030-000) |
5 | Power supply, 230 VAC/DC, with diagnostics, with fuse holder (750-611) or |
US | System supply (24 VDC) |
UF1 | Field supply 1 (24 VDC) |
UF2 | Field supply 2 (24 VDC) |
UF3 | Field supply 3 (230 VAC) |
Power Supply with FE Power Jumper Contact
If an FE power contact is required after the supply filter (750-626/xxx-xxx), an additional supply module is required after the supply filter. For this purpose, the field supply from the supply filter (750-626/xxx-xxx) must be bridged to the supply module.
1 | Head station |
2 | Supply filter, 24 VDC, HI GF (750-626/020-002) or |
3 | Power supply, 24 VDC (750-602) or |
US | System supply (24 VDC) |
UF1 | Field supply 1 (24 VDC) |
FE | Functional ground |