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Seaboard System

Seaboard System searchlight signals can be connected to the Signalist SC1 as in the below diagrams.

Seaboard System triple head searchlight connected to a SC1



Seaboard System triple head searchlight wiring diagram



Seaboard system twin head + single head searchlight connected to a SC1

Seaboard System twin head searchlight wiring diagram


Note that when using the CV38=8 configuration, flashing aspects can be achieved by toggling between the solid aspect and dark. Software such as JMRI will do this automatically.

Seaboard

Rule

Description

Aspect No

Triple head when CV38=79

Double head when CV38=80

Single head when CV38=80

Aspect No

Single head when CV38=132

Single head when CV38=129

291-5

Stop

0

R R R

R R

R

0

R

R

290

Restricting

1

R R L

R L

L

3

L

-

288

Slow Approach

2

R R Y

- -

-

8

-

-

287

Slow Clear

3

R R G

- -

-

8

-

-

286

Medium Approach

4

R Y R

R Y

-

8

-

-

285

Approach

5

Y R R

Y R

Y

1

Y

Y

284

Approach Slow

6

Y R G

- -

-

8

-

-

283B

Medium App. Slow

7

R Y G

- -

-

8

-

-

283A

Medium App. Approach

8

R Y Y

- -

-

8

-

-

283

Medium Clear

9

R G R

R G

-

8

-

-

282A

Advance Approach

10

Y Y R

Y Y

y

5

y

y

282

Approach Medium

11

Y G R

Y G

-

8

-

-

281D

Limited Approach

12

R y R

R y

-

8

-

-

281C

Limited Clear

13

R g R

R g

-

8

-

-

281B

Approach Limited

14

Y g R

Y g

-

8

-

-

281

Clear

15

G R R

G R

G

2

G

G

-

Dark

16

 

 

 

8

 

 

Key R=Red, r=Flashing Red G =Green, g=Flashing Green, Y=Yellow, y=Flashing Yellow, L=Lunar, W=White.


In JMRI use DCC Signal Mast Decoder for CV38=79, CV38=80, CV38=132 and CV38=129. For CV38=8 use Double Output or Triple Output RGB for each head.


Signal reference chart for the 1989 rules can be found at the Signals of the US website:- Seaboard System PDF



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