Mastervolt MAC 24/12-20 Betriebsanleitung Seite 2

Product description and application
The MAC 24/12-20A converter transforms a 24VDC
(battery) voltage to a regulated DC voltage. It offers you
the following applications
"INSTALLATION"):
1. a 13.6V stabilized DC power supply / single stage
float charger (e.g. to supply 12V equipment from a
24V system), or
2. a three-stage battery charger to charge a 12V battery
from a 24V system fully automatically, or
3. a dimmer for 12 or 24V lights.
The MAC 24/12-20A can only be used in installations
with a common negative ground.
Settings
There is no need to change the settings if the converter is
used as a 13.6V stabilized DC power supply / single
stage float charger.
Inside the converter four DIP switches can be found to
adjust the converter
preferences (see table "DIP SWITCH SETTINGS").
To adjust the DIP switches, proceed as follows:
1. Be sure the converter is disconnected from any
power source / battery;
2. Remove the back cover of the converter by loosen
the four screws (see drawing "DIMENSIONS");
3. Use a small flat-blade screw driver to change the
DIP-settings;
4. Remount the back cover again.
When more converters are paralleled to increase the total
output current, DIP-switches 1, 2 and 4 must be set to
the "OFF"-position.
Installation
• Be sure that the output of the supplying source is
switched off during installation. Also be sure that no
consumers are connected to the batteries during
installation, to prevent hazardous situations.
• Check that the battery voltage is the same as the
converter's input voltage (e.g. 24V battery for a 24V
input voltage). Also check that the output voltage
satisfies loading requirements.
• Due to possible moisture accumulation and optimal
heat discharge, the converter must be installed in a
well-ventilated room protected against rain, vapour,
moisture and dust. We advise to mount the unit in a
vertical position with the connecting cables downward.
Connections
For correct connection - see drawings "INSTALLATION".
• Use reliable cord end terminals to fix the wires to the
DC-input and –output.
• The recommended minimum cross sectional area for
the cable is 4 mm².
• To minimise any EMC-interference we advise to
connect the negative pole of the supplying battery to
the ground.
Connect a momentary switch between the "switch"-
connection and the common ground if you want to use
the remote switch function and/or the light dimmer
function.
(see drawings
according to your personal
ENGLISH
Extended functions
Via the "QRS232 communication port" various settings
can be adjusted in terms of software to your specific
demands (control software and interface not included).
Check the
applications. Please mind that this plug is not intended
for connecting any remote panels or a battery
temperature sensor.
Operation
The converter operates automatically. Under normal
circumstances, there is no need for operation. Despite its
low no-load consumption, the converter should be
disconnected from the supplying battery when it is not in
use to protect the battery from discharging.
Refer to table "SWITCH OPERATION" for explanation of
the remote switch function / dimmer operation.
Safety regulations and measures
1. Install the converter according to the stated
instructions.
2. Never use the converter at a location where there is
danger of gas or dust explosions.
3. Connections and safety features must be executed
according to the locally applicable regulations.
4. The converter may only be taken into operation while
the cover is closed as lethal voltages may exist.
The converter is protected against short circuiting with an
input fuse. If the plus and minus connections on the
battery are exchanged, an internal fuse will blow. Do not
use fuses
specifications.
Guarantee terms
Mastervolt guarantees that this converter was built
according to the legally applicable standards and
stipulations. During production and before delivery all
converters were exhaustively tested and controlled. If you
fail to act in accordance with the regulations, instructions
and stipulations in this user's manual, damage can occur
and/or the converter will not fulfil the specifications. This
may mean that the guarantee will become null and void.
The guarantee period is 2 years.
Liability
Mastervolt cannot be held liable for:
• Damage resulting from the use of the converter.
• Possible errors in the included manual and the
consequences of these.
• Use that is inconsistent with the purpose of the
product
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larger than those
SWITCH OPERATION
Short Converter switches off.
Press again to switch
on.
Long After 1 sec. the output
voltage slowly
decreases to 4V. Press
again to increase the
voltage
for
indicated in the