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Technical specifications
Compatibility
The following table lists the digital formats and address ranges
supported by the Loco Controller DHR-PIC. The Loco Controller
DHR-PIC connects to the central unit via the SX-bus.
That makes the Loco Controller DHR-PIC compatible with all
Selectrix-only central units and with central units that are equipped
with an SX-bus and where the support of different digital formats is
based on the Selectrix frame extension.
Supported digital formats and address ranges
The Loco Controller DHR-PIC supports the following digital for-
mats and address ranges:
Digital format
Address range
Speed steps
Selectrix
0 – 103
0 – 31
Selectrix-2
1 – 999
0 – 127
DCC, short addresses
1 – 127
0 – 28
DCC, long addresses
1 – 999
0 – 28
Motorola (MM new)
1 – 255
0 – 28
Size
74mm x 125mm x 27mm
Power supply
The power supply is provided by the SX-bus.
Display
3-digits display
Plugging
The Loco Controller DHR-PIC is delivered with an SX-bus cable. It
can be hot-plugged to any of the model railway’s SX-bus jacks.
The Loco Controller DHR-PIC must never be connected to the PX-
bus!
Assembly notes
The Loco Controller DHR-PIC is assembled following the instruc-
tions on the next page. For soldering the components on the PCB
a soldering station with the temperate set to approx. 400°C is
needed together with 0.5 or 1.0 mm soldering wire with rosin flux.
No special tools are required. Do not use soldering flux! Pay atten-
tion to solder speedy to avoid device damage by overheating.
Be aware that the PCB mounts from the two sides. For assembly
of the case a drill machine (or a portable electric drill), according
drill bits (2,0 mm, 7 mm) and a countersink for M2 counter-sunk
screws is required.
Non-Use
When the Loco Controller DHR-PIC is not used it should be stored
at a dry and clean place.
The Instruction
The full content of the instruction is important. Very important
information is marked in
col
ou
rs
; critical information is highlighted
in
red
.
Kit contents
Please first verify that the kit contains all the components listed
below.
General parts:
1x PCB
1x 28-pin IC socket
1x voltage regulator 78L05
5x push buttons
1x rotary switch
3x 7-segment-element
1x display frame with red glass
1x SX-bus cable (insulated at one side)
1x cable strap
1x case and sticker
1x rotary knob with cover
4x counter-sunk screw long
4x washers
12x threaded stud
ICs:
1x PIC16F913
1x LM339N
Transistors:
1x transistor BC557
3x transistor BC547
Capacitors (marking):
2x electrolytic 47µF
3x ceramic 100nF (104Z)
2x ceramic 220pF (221)
Resistors (marking):
2x 10kOhm (brown, black, black, red, brown)
11x 22kOhm (red, red, black, red, brown)
6x 4,7kOhm (yellow, lilac, black, brown, brown)
8x 680Ohm (blue, grey, black, black, brown)
2x 100Ohm (brown, black, black, black, brown)
1x 120Ohm (brown, red, black, black, brown)
Maintenance and care
The Controller DHR-PIC should be cleaned from time to time by
blowing or wiping.
The use of any kind of liquid for cleaning is prohibited explicitly.
Please also visit our FAQ page at www.firma-staerz.de for any
question first.
