Digitrax DS74 Manuale - Pagina 5

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5.0 External hardware Input lines:

The DS74 has eight external hardware control lines on the "SWITCH/SENSOR

IN" pluggable 10 pin PCB header and the 10-pin ribbon cable. The 6" Factory

ribbon cable is color coded and the BROWN pin 1 side should be on the right side

when plugged in, as shown in Figure 1. If you use external lines, connect these

wires to your custom wiring by e.g. a screw terminal block. If using a non-color

code ribbon cable, make sure the pin numbers are correct for Table 2 usage.

A +5V Reference voltage is provided on pin 10/ribbon cable BLACK wire, and a

0V reference on pin 9 or the WHITE wire. DO not draw more than 100mA from

the BLACK wire. The SW/SENS wires pins 1/BROWN to 8/GRAY are rated for

up to +18V maximum input voltage.

The lines SW1/BROWN, SW2/ORANGE,SW3/GREEN and SW4/VIOLET

wires will toggle the state of the same number output when briefly connected

to the +5V voltage on the BLACK wire or pin10. If the DS74 is connected to

LocoNet this will occur as a SW# message to make the change and notify the

system it has occurred. Use momentary press-ON buttons to control.

The lines SENS1/RED, SENS2/YELLOW, SENS3/BLUE and SENS4/GRAY

will send a LocoNet Block Occupancy or DS message at the SW# of the

output. This will be BLOCK OCCUPIED when the line is above +4V and a

BLOCK UNOCCUPIED when between 0V/WHITE and +2V.

For example; if the

SENS2/YELLOW line is

connected to the BLACK

+5V Reference wire, the

the DS number reported

will be SW# used for

Output 2R/2G. If SW10

is the BASE address of

the DS74, then Output2

is SW11 and the DS

message will be Block 11

OCCUPIED.

A disconnected SENS

line will report as

UNOCCUPIED.

The BD4N does not plug

directly into the 10 pin

header, and will not

operate. Connect the 5

wires used by the BD4N

by name via a terminal

strip. More conveniently, you may connect the BD4N through a DSXC4

connector with ribbon cables for true plug and play connectivity.

Table 2: DS74 Input lines

Pin# Wire Color

BROWN

RED

ORANGE

YELLOW

GREEN

BLUE

VIOLET

GRAY

WHITE

BLACK

— 5 —

Function

SW1 Toggle, +momentary

SENS1 occupancy level

SW2 Toggle, +momentary

SENS2 occupancy level

SW3 Toggle, +momentary

SENS3 occupancy level

SW4 Toggle, +momentary

SENS4 occupancy level

0V reference

+5V reference