Page 207 - IRSEM_Main Book

(c) The designs shall be suitable for the specific type equipment to be installed
such as Make of Electronic Interlocking (Distributed or Central), MSDAC,
SSDAC, UFSBI Etc and the type of Interfacing & features. Use of dual OFC
in Distributed type of Electronic Interlocking, Automatic signalling/Intermediate
Block signalling (schemes given at the end of respective chapters and
drawings given in Appendix II, are desirable as they provide an alternate
path in case of Failures).

(d) The drawings & designs shall be made, in accordance with Typical templates,
RDSO`s Standard circuits/templates, guidelines, Board guidelines, Industry`s
best practices & principles of Reliability, Availability, Maintenance & Safety in
mind.

(e) Uniformity of designs shall be ensured in the same section/station. For
example:

(i) Same Relay contact may be allocated to same aspect of every signal at
a station/section.

(ii) Officer incharge shall make out such list of standard practices for guidance
of all design staff.

(f) In case of alterations to existing installations, the following colour code may
be adopted for clear understanding of staff for smooth work.

(i) Single drawing method for simple alterations: Green for deletions &
Red colour for additions, in same sheet.

(ii) Two drawing method for major alterations: Green for deletions & Red
colour for additions in separate sheets. Sequence of work & procedure
to be followed shall also be mentioned in a descriptive document (with
document/File number) to be attached along with drawings and marked
as “Procedure for alterations for ……. Work at ….. Station for signalling
plan no….”.

8.7.2 Control Panels-General: Refer to Para 21.1.2

8.7.3 Arrangements for control panel: Refer to Para 21.1.3

8.7.4 Indications to be provided for Control Panel: Refer to Para 21.1.4

8.7.5 Interlocking and Circuit Requirements - General: Refer to Para 21.1.5

8.7.6 Route Setting Type - Refer to Para 21.1.6

8.7.7 Non Route setting Type: Refer to Para 21.1.7

8.7.8 Route Release Circuits: Refer to Para 21.1.8

8.7.9 Signal Control Circuits: Refer to Para 21.1.9

Chapter 8: Drawings & Specifications Page 174 of 535