Uhlenbrock 81310 User guide

Digital-Servo 81 310

Charateristics

• For Märklin oder DCC Digital systems and Analogue operation

• Integrated Digital decoder

• Switchable by locomotive functions, solenoid or proportional to speed setting

• Configurable turning speed

• Up to four configurable stop positions

• Rotation angle up to 180°

• Configured by DCC CV programming or by a Motorola Digital center

• With mounting material, cam levers and control wires

2 x 0.4 mm and 1 x 0.6 mm, length 100 mm

• Torque 2 Ncm

• Dimensions 20.0 x 17.6 x 8.0 mm

Description

The digital servo with the integrated digital decoder is suitable for installation in vehicles, as well as for use
in stationary working models. The quiet, smooth running spoils even the fastidious Model railroader. The
servo moves the item with the enclosed control wire. In vehicles for example, pantographs or doors can be
moved. In fixed items for example, it can move turnouts, signal semaphores, boom gates, water cranes and
gates.

With the enclosed mounting material the servo can be installed in many different positions.

Connection

The digital servo has two connecting wires which are connected in an analogue operation as shown below
or in digital operation to the track power from the digital center or a Booster.

Attention: Manual turning of the servo cam will destroy the servo!

Example for connecting in Analogue Operation

Meaning for the connection:
Plus to red, Minus to black wire – the Servo moves to Position 1.
Plus to black, Minus to red wire – the Servo moves to Position 2.

Attention: The reversing pulse from a Märklin transformer will destroy the servo!

Analogue Operation

The Servo can be operated with DC or AC voltage between
10V und 20V. Depending on the polarity the servo moves
between two programmable end positions at a maximum
angle of 180°. These end positions can be programmed, for
use in an analogue system, with a digital center in CV261
for position 1 and CV262 for position 2 (see the section
“Programming “).

Bit 0 in CV 29 can be used to swap the rotation direction.

The servo operates for as long
as a key is pressed, up to the
stop position.

Important: Only one key can be
pressed at a time!

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Digital Operation

In the digital operation the servo can be controlled in five different operating modes. The appropriate
operating mode is specified in CV257 (see the section “Selection of Digital Format and Operating Mode”).

In all modes the operating speed between the end positions are adjustable (CV 258), as is a starting
delay (CV259). The brake delay is fixed
Up to four stop positions can be programmed in CVs 261 to 264. The value range is between 0 and 255

and corresponds to a total angle from 0 to 180°.
Bit 0 of CV29 can be used to swap the rotation direction in all operating modes (see Table “Calculating

the value for CV29 “).
The Locomotive address is either programmed in CV1 (short address DCC 1-127, Mot. 1-80) or in CVs 17

and 18 (long address DCC 128-9999). Bit 5 of CV29 determines if the short or the long address is to be
used (see Table “Calculating the value for CV29 “).

The Solenoid address (Operating modes 3 and 5) is always programmed into CVs 17 and 18 (only DCC
1-2000).

Operating Modes

Operating Mode 1 – Control by Locomotive address and Spe cial function

The servo can be operated by any desired locomotive
special function of a programmable locomotive address
between two programmable stop positions through a
maximum angle of 180°.

If the locomotive special function is switched off, stop
position 1 from CV261 is approached. If the locomotive
special function is switched on, the stop position 2 from
CV262 is approached.

The locomotive special function number is entered into the CV265 (high order byte) and CV266 (low order
byte). If CV265 contains a value of 128 (factory setting) a value between 0 and 28 can be programmed into
CV266, where the value corresponds to the desired locomotive special function number f0 to f28.

If locomotive special functions between f29 and f32767 are to be used the values to be programmed into
CV265 and CV266 are calculated with the following formula:

Locomotive special function number = high order byte * 256 + low order byte

Example

The Servo is to be controlled by locomotive special function f300 of locomotive address 10.
Divide the locomotive special function number by 256 (300/256 = 1, remainder 44)

Enter the result (1) as the value of CV265.
Enter the remainder (44) as the value of CV 266.

The following CVs need to be programmed:
CV1 (short address) = 10, CV 265 = 1, CV 266 = 44

Operating Mode 2 - Control by Locomotive address and Speed St ep

The servo can be controlled proportional to the position
of the speed control from any locomotive address,
whereby speed step 0 is the extreme left of the servo’s
travel and the maximum speed step (14 or 28,
depending on the value of CV29) the extreme right
position of the servo’s travel. The desired end positions
are reached by the speed control over a maximum
angle of 180°.

Operating Mode 3 - Control by Locomotive address, Speed Step and Direction

The servo can be controlled proportional to the position
of the speed control from any locomotive address,
whereby speed step 0 brings the servo to its central
position. With the maximum speed step in the forward
direction driving the servo to its extreme right position,
and with the maximum speed step in reverse direction
to its extreme left position, the desired end positions
are reached by the speed control over a maximum
angle of 180°.

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