Digitrax SMBK Manuel - Page 3

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Plug 'N Play Signal Mast Base (pad number and pin out)

Yellow Hi (Pin 6)

Red Hi (Pin 4)

Solder

pad for

mounting

brass

mast

BACK

Signal Head Examples:

3 over 3 dual "G" type signal heads such as the Tomar H-866, can be con-

nected to a Plug 'N Play Signal Mast Base (with the signal mast removed). The

white common anode lead (for both heads) connects to Common Lo (Pin 1)

pad and the signal's longer wires from the red/green/yellow LEDs from the

Lower (dwarf) signal head connect to Red Lo (Pin 7), Green Lo (Pin 3) and

Yellow Lo (Pin 5) pads on the front of the Signal Mast Base. The shorter 3

wires from the upper head connect to the pads on the back Red Hi (Pin 4),

Yellow Hi (Pin 6) and Green Hi (Pin 8).

Single signal heads such as Tomar H-856 (type "G"-3 LED vertical) or H-855

(3 LED target) connect the white common to Common Lo (1) and connect the

3 color leads to the Lo (1, 5, 7) pads for the dwarf signal or the Hi (4, 6, 8)

pads for the mainline signal. The combinations are shown in the schematic.

2-LED signals, such as Tomar N-857 with only red and green LEDs, omit the

yellow pad connection and use the red and green pads for LED control.

2443 Transmitter Rd

Panama City, FL USA 32404

www.digitrax.com

Green Hi (Pin 8)

Common Hi

(Pin 10)

Holes for

retaining

Current setting

wires for

mounting

(100 ohm min)

signal

mast

www.digitrax.com

Green Lo (Pin 3)

Common Lo

(Pin 1)

Aux Hi (Pin 2)

resistors

Pin 1

lower left

850-872-9890

850-872-9557

Red Lo (Pin 7)

Yellow Lo (Pin 5)

Aux Lo (Pin 9)

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