Digitrax BDL162 Руководство - Страница 10

Просмотреть онлайн или скачать pdf Руководство для Датчики безопасности Digitrax BDL162. Digitrax BDL162 13 страниц. Loconet occupancy detector

The BDL162 is designed to operate "downstream" of the Digitrax boosters and

power management devices. The BDL162 is the "last" device in the chain from

booster to power manager to BDL162. It is connected directly to the track

detection section. There should be no other connections to any detection

section that will draw track power or the detection section will always

show occupied.

If a device is used to switch off power feeding the BDL162 and the track it is

connected to, for example, a PM42 Power Manager, it should break the track

power to both the zone and detection common rail. If a device only switches

off a single leg, then it must be placed in the detection common rail wiring.

The BDL162 can report occupancy information via the LocoNet connection or

via direct output to a user created LED panel.

The BDL162 provides occupancy messages to LocoNet that can be used by

computer software for a visual display of occupancy status on the layout or to

other devices on the layout. For instance, the Digitrax SE8 or SE8c can use

these messages to control signals on the layout. See the operations manual of

your computer software or the SE8C for details on installation and operation.

Each BDL162 comes with an LT5 that will help you with layout wiring and

troubleshooting for transponding & detection. The LT5 plugs onto the LED

connections of BDL162 and the LEDS on the LT5 light when detection sec-

tions are occupied. The status of power to each zone is also shown. (Figure 6.)

Figure 6: LT5 Tester

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11.3 Panel Indicator Wiring

You can build a display panel with a track schematic and LEDs to indicate

track occupancy by connecting LEDs to the output connectors A, B, C, and D

shown in Figure 6. For a panel display of occupancy status made up with user

supplied LEDs, connect to the four 0.1" 2x5 headers, and wire up LEDs as

shown in Figure 7: LED Panel Indicators Wiring. DigiKey (1-800-DigiKey)

part number M1AXA-1036R-ND is a convenient plug and cable assembly that

you can use to wire LED indicators. Header "A" includes the 4 detection indi-

cators for detection sections 1 to 4 and the zone power indicator for zone A

that includes these four detection sections

The BDL162 incorporates current setting resistors to set the LED current typi-

cally about 3mA. If you use higher LED drive currents you can use external

transistors etc to amplify the LED current.

The LED drive from the BDL162 is active high at about +5 volts above the

BDL162 ground pin, via a 1 Kohm resistor. Note that the ribbon cable includes

separate ground return conductors for each LED that allow a 10 conductor rib-

bon cable to be split into 5 pairs to conveniently route to individual LEDS. Be

sure to connect the +ve active output leads to the LED anodes.

Figure 7: LED Display Wiring