BlocD8 - High Density
DCC Block Detector
The BlocD8 is an eight block
occupancy detector for DCC. It is particularly useful
where high density or centrally located detection is
desired. Yards and automatic train control are some
examples. It provides complete isolation from the track
by using transformer type sensors. This also means there
is no drop in track voltage as there is with sensing
diodes. The BlocD8 is designed to work well with the
SIC24AD signal and indicator
controller. The BlocD8 can used in a stand-alone mode
or in a network with other devices.
MSRP - 98.95 USD
Manual in PDF format
Color
Picture
Board size: 2.5" X 4.0"
Features:
8 block detectors
Electrical isolation from the track
No track voltage drop
LED indicator for each block
Sensitivity adjustment
Powered from DC or DCC track voltage
Operates stand-alone or in a network via the serial bus
Serial bus is Digitrax LocoNet® compatible
Provides 8 routes for turnout control when the serial bus
is used
• Up to 8 turnouts per routes
• Routes can be executed by a block occupancy change
• Routes can be executed by an external device connected
to the serial bus
Provides 8 outputs
• For remote LED indicators
• For direct connection to SMD82 inputs for turnout
control
• For driving relays
Specifications:
Operating voltage: 9 to 16 volts DC or DCC (track
voltage)
Typical operating current: 40 ma
Maximum load per output: 50 ma
Typical trigger current (sensitivity) adjustment: ~ 1.3
ma to 7 ma with one pass wire through sensor
Maximum continous sensor current: 3 amps
Operation:
The BlocD8 is capable of sensing current in eight
isolated sections of track called blocks. This provides
for detecting the presence of locomotives or other
rolling stock that draw current from the track.
When the current in the sensor reaches the trigger level,
the output is turned on and the LED lights show the block
is occupied. If the serial bus is used a message is sent
indicating the status of the block.
This diagram depicts the BlocD8 detecting three blocks in
a single power district. Since each detector is completed
isolated from each other and the track no special
provision is required for the BlocD8 to be used across
several power districts. In an actual application a
terminal strip would be used to connect the wire that
loops though the BlocD8 sensors to the other wires.
