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Union Pacific

Union Pacific searchlight signals can be connected to the Signalist SC1 as in the below diagrams.

Union Pacific triple head searchlight connected to a SC1

Union Pacific triple head searchlight wiring diagram



Union Pacific twin head + single head searchlight connected to a SC1

Union Pacific double 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.

UP
1988
Rule

UP
2012 Rule

Description

Aspect No

Triple head  CV38=76

Double head  CV38=77

Single head  CV38=77

Aspect
No

Single head  CV38=132

Single head when CV38=129

245P/Q

9.2.14/15

Stop

0

R

R

R

R

R

R

0

R

R

245N

9.2.13

Stop and Proceed (alt1)

1

r

R

R

r

R

r

4

r

r

245N

9.2.13

Stop and Proceed (alt2)

2

-R

R

r

R

r

r

4

r

r

245M

9.2.13

Restricting (alt 1)

3

R

R 

L

R

L

L

3

L

-

245M

9.2.13

Restricting (alt 2)

4

R

L

R

R

L

L

3

L

-

245M

9.2.13

Restricting (alt 3)

5

R

R

L

R

L

L

3

L

-

-

9.2.12

Div. Approach Div.

6

R

Y

Y

- -

-

8

-

-

245L

9.2.11

Diverging App. Slow

7

R

R

Y

- -

-

8

-

-

245K

9.2.11

Diverging Approach

8

R

Y

R

R

Y

-

8

-

-


9.2.10

Diverging Advance
Approach
Slow

9

R

R

y

R

y

-

8

-

-

245J

9.2.10

Diverging Advance Approach Limited

10

R

y

R

R

y

-

8

-

-

-

 

 

9.2.16

Div. App. Clear 50

11

R

Y

G

- -

-

8

-

-

-

9.2.7

Approach Restricting

12

Y

r

R

Y

r

-

8

-

-

245H

9.2.9

Diverging Clear Slow

13

R

R

G

- -

-

8

-

-

245G

9.2.9

Diverging Clear

14

R

G

R

R

G

-

8

-

-

245F

9.2.8

Diverging Clear Limited

15

R

g

R

R

g

-

8

-

-

245E

9.2.7

Approach Restricting

16

Y

L

R

Y

L

-

8

-

-

245D

9.2.6

Approach

17

Y

R

R

Y

R

Y

1

Y

Y


9.2.5

Approach Diverging
Slow

18

Y

R

Y

Y

Y

-

8

-

-

245C

9.2.5

Approach Diverging

19

Y

Y

R

Y

Y

-

8

-

-

245B

9.2.4

Approach Limited

20

y

R

R

y

R

y

5

y

y

-

9.2.3

Approach Clear 50

21

Y

G

R

Y

G

-

8

-

-

-

9.2.2

Approach Clear 60

22

Y

g

R

Y

g

-

8

-

-

245A

9.2.1

Clear

23

G

R

R

G

R

G

2

G

G

-

-

Dark

24-31

- - -

- -

-

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=76, CV38=77, CV38=132 and CV38=129. For CV38=8 use Double Output or Triple Output RGB for each head. Visit the JMRI UP-2008 signal system to see the available mast types.


Signal reference chart for the 1988 rules can be found at the Signals of the US website:- Union Pacific 1988 aspects PDF
Signal reference chart for the 2012 rules can be found in the rulebook system special instructions item 19:- Union Pacific 2012 rulebook PDF



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