AS ISO 7240.17:2015 pdf download.Fire detection and fire alarm systems Part 17: Short-circuit isolators.
At least the following data are required to conduct the tests specified m this part of ISO 7240:
a) maximum line voltage,
b) minimum line voltage, i.e. without a short circuit or partial short circuit fault
c) maximum rated continuous current with the switch closed,
d) maximum rated switching current (e.g. under short circuit conditions).
e) maximum leakage current, 4, with the switch open (isolated state); fl maximum series Impedance with the switch closed,
g) ranges of parameters for each stimulus that the manufacturer claims will cause the short-circuit isolator to change from the closed to the open condition;
h) ranges of parameters for each stimulus that the manufacturer claims will cause the short-circuit isolator to change from the open to the closed condition;
i) whether the device is type A or type B.
NOTE Additional information can be required, depending on the product design and function. to demonstrate combrmity with the requiements of this part of ISO 7240.
4.9 Additional requirements for software controlled short-circuit isolators
4.9.1 General
For short-circuit Isolators that rely on software control In order to fulfil the requirements of this part of ISO 7240,
the requirements of 4.9.2, 4.9.3 and 4.9.4 shall be met.
4.9.2 Software documentation
4.9.2.1 The manufacturer shall submit documentalion that gives an overnew Qf the software design. This documentation shall be in sufficient detail for inspection of the design for compliance with this part of ISO 7240 and shall inck,de at least the folowing:
a) functional description of the main program flow, e.g. as a flow diagram or structogram, including a brief description of the modules and the functions that they perform, the way in which the modules interact.
— the overall hierarchy of the program,
the way in which the software interacts with the hardware of the short-circuit isolator,
the way in which the modules are called, Including any interrupt processing;
b) description of those areas of memory used for the various purposes, e.g. the program, site-specific data and running data;
c) designation by which the software and its version can be uniquely identified.
a) maximum line voltage,
b) minimum line voltage, i.e. without a short circuit or partial short circuit fault
c) maximum rated continuous current with the switch closed,
d) maximum rated switching current (e.g. under short circuit conditions).
e) maximum leakage current, 4, with the switch open (isolated state); fl maximum series Impedance with the switch closed,
g) ranges of parameters for each stimulus that the manufacturer claims will cause the short-circuit isolator to change from the closed to the open condition;
h) ranges of parameters for each stimulus that the manufacturer claims will cause the short-circuit isolator to change from the open to the closed condition;
i) whether the device is type A or type B.
NOTE Additional information can be required, depending on the product design and function. to demonstrate combrmity with the requiements of this part of ISO 7240.
4.9 Additional requirements for software controlled short-circuit isolators
4.9.1 General
For short-circuit Isolators that rely on software control In order to fulfil the requirements of this part of ISO 7240,
the requirements of 4.9.2, 4.9.3 and 4.9.4 shall be met.
4.9.2 Software documentation
4.9.2.1 The manufacturer shall submit documentalion that gives an overnew Qf the software design. This documentation shall be in sufficient detail for inspection of the design for compliance with this part of ISO 7240 and shall inck,de at least the folowing:
a) functional description of the main program flow, e.g. as a flow diagram or structogram, including a brief description of the modules and the functions that they perform, the way in which the modules interact.
— the overall hierarchy of the program,
the way in which the software interacts with the hardware of the short-circuit isolator,
the way in which the modules are called, Including any interrupt processing;
b) description of those areas of memory used for the various purposes, e.g. the program, site-specific data and running data;
c) designation by which the software and its version can be uniquely identified.
