BS EN IEC 61158-3-4:2019 Industrial communication networks. Fieldbus specifications Data-link layer service definition. Type 4 elements

Communication networks
Interfaces (data processing)
Communication procedures
Computer networks
Industrial
Data link layer (OSI)
Automatic control systems
Bus networks
Fieldbus
Open systems interconnection
Process control
Data transmission

Link: BS EN IEC 61158-3-4:2019 Industrial communication networks. Fieldbus specifications Data-link layer service definition. Type 4 elements
Source: BSI Standards

BS EN IEC 61158-4-12:2019 Industrial communication networks. Fieldbus specifications Data-link layer protocol specification. Type 12 elements

Automatic control systems
Process control
Bus networks
Industrial
Interfaces (data processing)
Data transmission
Fieldbus
Communication networks
Communication procedures
Data link layer (OSI)
Computer networks
Open systems interconnection

Link: BS EN IEC 61158-4-12:2019 Industrial communication networks. Fieldbus specifications Data-link layer protocol specification. Type 12 elements
Source: BSI Standards

IEC TR 61189-5-506:2019 Test methods for electrical materials, printed boards and other interconnection structures and assemblies General test methods for materials and assemblies. An intercomparison evaluation to implement the use of fine-pitch test structures for surface insulation resistance (SIR) testing of solder fluxes in accordance with IEC 61189-5-501

Soldering fluxes
Evaluation
Structures
Printing board
Test methods

Link: IEC TR 61189-5-506:2019 Test methods for electrical materials, printed boards and other interconnection structures and assemblies General test methods for materials and assemblies. An intercomparison evaluation to implement the use of fine-pitch test structures for surface insulation resistance (SIR) testing of solder fluxes in accordance with IEC 61189-5-501
Source: BSI Standards