IEEE Std 1475:1999 pdf free download

IEEE Std 1475:1999 pdf free download.IEEE Standard for the Functioning of and Interfaces Among Propulsion, Friction Brake, and Train-borne Master Control on Rail Rapid Transit Vehicles.
4. Complexity of interlaces
For each of the interfaces specified in Clause 5. standards are established for up to three levels of complexity. In using this standard, the authority having jurisdiction shall specify a level of complexity for each interface, consistent with the design requirements of the vehicle.
NOTE—The requirements for some interfaces, a dehned in this standard. may preclude the w.c of some inerface types. In thosc instances. this standard will specify the type of interface to be used “Same as Type I interface’).
4.1 Type I interfaces
A Type I interface, in the context of this standard, has the following characteristics:
a> Interface signals arc primarily of the “off-on” form.
b Except where the nature of the interface requires otherwise, the signals are transmitted at the voltage level of the control batteiy system.
C) Signal flow across a given interface is one-way.
d Fault annunciation is limited to simple indicating lights or similar means.
c) No data recording or fault logging is provided, excepi as may be required by regulation.
4.2 Type II Interfaces
A Type II interface, in the context of this standard, has the following characteristics:
a) Interface signals arc a mix of digital and analog/proportional signals, usually at the vehicle battery voltage or from a power supply derived therefrom.
b) Signal flow across a given interface remains one way.
c) Fault annunciation is still limited to indicating lights or similar means, but more indications.
d) Data recording or fault logging, if provided. is done at one system level, either at the vehicle level or at the functional system level. Both levels may be provided, but there is no exchange of information between the levels.
4.3 Type III interfaces
A Type III interface, in the context of this standard, has the following characteristics:
a> Most interface functions extensively use serial communication links or data buses.
b) Signal flow and communication across interfaces are two-way.
c) Comprehensive system, vehicle, and train information displays are available to the operator.
d Integrated data recording and fault logging is provided, in which information is shared among system levels, including train level. schick level, and functional system level.
An example of a simplified block diagram for a consist of vehicles comprising Type I. Type II. and Type III interfaces is given in Annex LI. Figure 11.1, Figure 11.2 and Figure B.3. respectively.