Uhlenbrock Elektronik 67810 User manual

Servo Decoder 67810
With switch contacts for connecting 4 Servos
Characteristics
xFor Märklin and DCC Digital systems
xSwitched like a solenoid decoder
xFully configurable switch address for each Servo
xConfigurable stop positions
xConfigurable angular speed
x4 stop positions via 2 addresses in DCC operations
xRelay outputs e.g. for frog polarization
xConfigured by digital system’s turnout keys
xOr by DCC CV Programming
xPower supplied from the track or a separate transformer
xVery low power consumption by use of an integrated regulator
xAll outputs are provided on plug connectors
Description
The servo decoder serves to control Servos, commonly employed in modeling, to
solve mechanical control problems on the model railway layout. For example, with
the appropriate mechanics, the Servos can change turnout positions, move water
cranes in, open doors of locomotive sheds, operate boom gates and much more.

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Up to four Servos can be connected to a servo decoder and operated independently
of each other. The servo decoder works like a turnout decoder and in a digital
system is assigned a solenoid address for each servo. By using the digital system’s
solenoid control the servo can be brought to two stop positions. The servo decoder
operates with all DCC and Motorola Digital systems. In addition the decoder has 4
switched outputs which operate in parallel with the respective servo. This is a
change over switch which changes its state with the servo position. In this way
switching tasks are done e.g. changing the polarity of turnout frog or cutting the
track power at signals.
The servo’s stop positions for the two solenoid states “red” and “green” can be
configured independently. The speed at which the servo moves between the two
end positions can also be configured. For special applications each of the
connected servos can be stopped at two additional stops by an additional solenoid
address. This way mechanical items like water cranes can be moved between four
positions via two solenoid addresses.
For optimal use of the change over switch, which is operated with the servo motion,
the time at which the switch is to change over can be configured. The change-over
can occur at the start, end or middle of the movement. The switching time can be
independently configured for each servo movement.
1 Address, both stops and the rotating speed for each servo are separately setup
with simple key programming from Motorola and DCC centers.
When using a DCC center like the Intellibox all parameters can be programmed by
CV programming. That way, 2 addresses, their stops, the rotating speed and the
rocker function can be separately setup for each servo.

3
Installing the Servo decoder 67810
Connecting the Servo decoders
For the “track”, “Trafo” and the relay contacts, 16 small
push-on covers are included in the contents. The wires are
stripped approx. 5mm, held into the slot from the underside
and fixed with a push-on cover. The slot in the push-on
cover points toward the wire‘s isolation.
The “track” connections are connected with the track
connector of a DCC or Motorola digital center. In this
instance the decoder is powered via the track.
Note: Since most Servos move uncontrolled when supply
voltage is switched on (this is a servo characteristic and is
not produced by the servo decoder), we recommend, to
connect the “Trafo” terminals to a 16V model railway
transformer. This will ensure that the uncontrolled
movements of the Servos will only occur when the entire
layout is switched on.
Connecting the Servos to the Servo Decoder
Each servo decoder has four 3-pin headers for connecting a maximum of four
Servos. The Servo’s plugs are plugged onto the appropriate header so the earth
wire (usually black or brown) is at the front edge of the circuit board.
Header pin assignment
Earth - PCB front edge, 5V – middle, Control wire - back
Tip: If the distance from the servo to the servo decoder is too far you can extend the
lead without any difficulty. Servo cables with plug and socket are available in
specialized electronics outlets.

4
Programming
From a DCC center the decoder can be programmed by keys and solenoid
instruction or by using CV programming.
With key programming not all items can be used.
Item Key Programming CV-Programming
Data format x x
Switching Addresses 1 2
Stop positions 2 4
Switching time x x
Relay Switching time - x
Selection whether the servo is always to be
switched on or only during servo movement - x
Programming by Key and Solenoid Command
The desired servos should be connected to the outputs that are to be programmed
and should be attached, since the servo decoder acknowledges the setting of the
servo parameters during programming with a movement of the respective servo.
1. Activating Programming Mode
Press the key on the decoder and keep it pressed. The control LED blinks.
2. Selecting Data Format
The LED blinks alternately at flashing rate A and flashing rate B for 5 seconds in
each case.
Meaning:
Blinking rate A = __ __ __ = selection DCC format
Blinking rate B = _ _ _ _ _ _ = selection Motorola format

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If the key is released during the appropriate blinking rate then the appropriate data
format is selected.
Note: If the decoder no longer reacts to key inputs from the input device the wrong
data format was selected! Programming must be repeated.
3. Specify servo output to program
When the key is released the servo on connector 1 briefly moves back and forth. If
the key is pressed again the servo at connector 2 briefly moves back and forth.
Further operation changes to output 3 and 4. If the key is then operated again,
programming mode is terminated.
Operate the key repeatedly until the servo on the output to be programmed moves
briefly.
4. Specifying the solenoid address for the selected servo output
On the digital center or another control device which can switch solenoids, operate
one of the two keys (red or green) which are to move this servo later. The servo
decoder acknowledges the key press by the servo briefly moving back and forth.
5. Selecting solenoid keys for [+] and [-] keys
In order to be able to set up stops and the speed of the servo during programming
two keys must be specified to be used as [+] and [-] key.
From the digital center or another control device which can switch solenoids, press
the key which is to be used as [+]-key. The solenoid address of this key must not be
the same as the previously selected solenoid address. The servo decoder
acknowledges the key press by briefly moving the servo back and forth.
In the same way the key which is to be the [-]-key is determined.
Note: After programming this allocation is deleted so that these keys can be used
on the layout as normal.

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6. Setting the stop positions of the Servos
Using the address setup in step 4 the servo can now be moved to stop position
“red” with the red solenoid key. With the help of the [+] and [-] keys, specified in
step 5, the stop position of the Servos is adjusted accordingly. For this press the [+]
or [-]-key is repeatedly pressed as until the desired retaining position is reached.
With the green solenoid move the servo to the stop position "green" as described
above.
When desired positions are fixed the servo must be switch to the "red" and "green"
stop positions 3 times (thus red-green-red-green-red-green) without changing the
setting, in order to go to the next programming step (keys in accordance with step 4).
7. Setting the speed of the Servos
The servo now moves independently back and forth with the set speed between the
two stop positions. The speed of the movement can be increased or decreased with
the [+] and [-] keys, as specified in step 5.
8. Terminate Programming
When the desired speed is adjusted one of the two keys which change the servo
position is operated, (keys in accordance with step 4).
Programming for this servo output is complete and the servo decoder is ready for
the programming of the next output. The selected settings are permanently stored.
Note: If the programming is terminated prematurely, as in the track power is
switched off, then the selected settings are stored.
CV Programming with DCC Devices
The decoder can be programmed with the Intellibox and any DCC center that
permits 3 digit numerical values. Use the programming menu of your DCC center to
select and program the decoder CVs. The exact process will be outlined in the
center’s manual.

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Note: If the Servo decoder is not programmable by CV Programming (because it is
being operated in Motorola Format) steps 1-8 for an output must be carried out by
key programming. For this the DCC format must be selected in step 2.
Connection of the servo decoder for programming
For programming the servo decoder it must be individually connected to a
programming track. The desired servos are connected to outputs which are to be
programmed.
Configuring the Servo decoder
CV119 determines various settings of
decoder:
If the power on the different servo outputs is
always switched on, or only during servo
operation and if the operating mode is
Motorola or DCC.
The entered value is calculated from the CV
table in which the values of the desired
functions are added.
Example
Output 1 power always on value = 1
Output 2 power always on value = 2
Output 3 power always on value = 4
Output 4 power always on value = 8
Operating mode DCC value = 0
Sum of all values is always 15.
This value is preset in CV 119 by the factory.
Bit Function of CV119 Wert
0 Power output 1
only switched on during
servo operation
always switched on
0
1*
1 Power output 2
only switched on during
servo operation
always switched on
0
2*
2 Power output 3
only switched on during
servo operation
always switched on
0
4*
3 Power output 4
only switched on during
servo operation
always switched on
0
8*
7 Operating Mode
DCC
Motorola
0*
128

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Configuring the Servo Outputs
Address 1and 2 (CV 120 und 121, 160 und 161)
The addresses for each servo output can be freely selected. The valid range of
address is 1-2048.
The servo is brought to the stop by the Address 1 in accordance with CV122 (red)
and CV123 (green).
Address 2 brings the servo to stop positions in accordance with CV162 (red) and
CV163 (green).
Note: Address 2 can be configured by CV programming.
Addresses to 255 can be entered directly as values in the CV for the Low byte (e.g.
CV121). CV for the High byte (e.g. CV 120) remains at value 0 (factory setting).
Addresses from 256, values for the High byte and the Low byte must be calculated.
For example, programming of the address 2000 is as follows.
xDivide the address value by 256 (2000/256 = 7 remainder of 208).
xRegister the integer result (7) as value in CV for the High byte (e.g. CV 120).
xRegister the remainder (208) as value in CV for the Low byte (e.g. CV 121).
Setting Stop positions (CV 122 and 123, 162 and 163)
The setting of the stops is done by numerical values between 0 and 127.
Setting time (CV 124)
Time constant for a Servo step.
Process time = (difference between "red" and "green" values) * setting time * 1 ms
desired procedure time in seconds * 1000
Setting time = difference between "red" and "green" values

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Switching point time of the Relay contacts (CV 125, 126)
The switching point time for the relay change-over can only be set for the first
address in each servo output. The switching point time for the second address is
always in the middle of the servo movement.
The values in the CV 125 and CV 126 have the following meaning:
0 = switching point time in the centre of the movement
1 = switching point time at the servo “red” end position
2 = switching point time at the servo “green” end position
CV125 (135, 145, 155): Switching point time with switching command “red” for
outputs 1-4
CV126 (136, 146, 156): Switching point time with switching command “green” for
outputs 1-4
Technical Data
Switch addresses: 2
Address range: 1-2048
Digital format: DCC, Motorola
Servo output: each 700mA
Total load: 700mA
Relay contacts: 3A
Accessories
Transformer 70VA Part No. 20070
with an output potential of 16V~ and maximum current of 4.3A.
Mini Servo*) Part No. 81410
Used in small spaces, i.e. for situations which don’t require a large torque.
Size 20.0 x17.6 x 8.0mm, Torque 4Ncm.

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Standard Servo*) Part No. 81420
For general use, e.g. on turnouts. Size 22.2x20.0x11.1mm, Torque. 13Ncm.
Precision Servo*) Part No. 81430
Very quiet and precise. Size 22.2 x 21.3 x11.1mm, Torque 14Ncm.
*) All Servos come with mounting material and 3 control wires of 100mm.
CV Table (Configuration Variables) for Servo decoder 67 810
Configuring the Decoders
CV Description Value
Range Factory Default
112 Software version (the processor used can be updated) - varies
113 Manufacturer code - 85
119 Decoder Configuration
Power output 1 (Bit 0)
0 = only on during servo movement
1 = always on
Power output 2 (Bit 1)
0 = only on during servo movement
1 = always on
Power output 3 (Bit 2)
0 = only on during servo movement
1 = always on
Power output 4 (Bit 3)
0 = only on during servo movement
1 = always on
Operating Mode (Bit 7)
0 = DCC operation
1 = Motorola Operation
Value
0
1*
0
2*
0
4*
0
8*
0*
128
0-143 15
The asterisk * denotes the factory default value