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Southern railway and british railways multi lamp colour light signal

SR style 4-aspect multi lamp colour light signal


The Southern Railway used colour light signals quite extensively starting in 1926 and these are the multi-lamp type that became the standard type used by Network Rail up until quite recently. They are the most widespread type of colour light signals to be found in the UK and can be two, three or four aspect and can have additional flashing aspects too.

3-aspect and 4-Aspect multi lamp signal operation table for CV38=1,CV38= 3, CV38=6, CV38=9 and CV38=14

Base

state

Base+1

state

Aspect

Normal

Normal

Red

Reverse

Normal

Green

Normal

Reverse

Yellow

Reverse

Reverse

Double Yellow

* Note that three aspect signals will display single yellow in place of the double yellow indication


Multi lamp signal operation table for CV38=8

Base

Red lamp

Base+1

Green lamp

Base+2

Yellow lamp*

Base+3

Yellow lamp**

Aspect

Reverse

Normal

Normal

Normal

Red

Normal

Reverse

Normal

Normal

Green

Normal

Normal

Reverse

Normal

Yellow

Normal

Normal

Reverse

Reverse

Double Yellow

Normal

Normal

Normal

Normal

Dark

* For 2-aspect signals Base+2 is the feather pivot lamp.                          
** For 2 and 3-aspect signals with a single feather Base+3 is the feather.    
Flashing aspects can be displayed by toggling between the desired aspect and Dark


Multi lamp signal operation table for CV38=128, CV38=130 and CV38=133

Aspect number

Aspect display

0

Red

2

Green

1

Yellow

3

Double Yellow

4

Flashing Red

6

Flashing Green

5

Flashing Yellow

7

Flashing Double Yellow

8

Dark

* Note that not all signal types can display all of the aspects

Multi lamp signal wiring diagrams


2-aspect signal wiring

Two aspect signal wiring diagram

4-aspect signal wiring

Three or four aspect signal wiring diagram

2-aspect with feather wiring

Two aspect signal with feather and optional seperate pivot lamp wiring diagram

3-aspect with feather wiring

Three aspect signal with feather wiring diagram

4-aspect with multiple feathers wiring

Four aspect signal with feathers wiring diagram

Several CV38 settings are possible:-
If using JMRI with standard accessory protocol use the BR-2003 signal system with the signal head controlled mast driver.If using JMRI with extended accessory protocol use the BR-2003 signal system with the DCC signal mast decoder driver.
Visit the JMRI BR-2003 signal system to see the available mast types.



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