scope:

The standard applies to all wiring circuit and electronic drawings for use within the

Railway Group. It incorporates the relevant symbols from British Standard BS 376:

Part 2: 2015. Symbols, whether drawn manually or generated by computed aided design (CAD) systems, shall comply with this standard.

The module does not specify what information shall be shown in any particular type of signalling design document, which is defined Module A3-3, A4-2, A4-3

This module is applicable to new and redrawn diagrams

Purpose

This Module defines the symbols for circuit diagrams used in signalling applications, so that the correct information is conveyed without ambiguity.