Dometic BUTTNER MT LB 40 Instructions De Montage page 17

• Only MT LB 40, MT LB 80, MT LB 24-40, and MT LB 24-60: Connect an external 60 A fuse to
the AUX connection.
• Only MT LB 12/24-20 and MT LB 12/24-40: Do not insert an external fuse to the AUX connec-
tion.
• The input and output voltage must not exceed 35 V.
CAUTION! Fire hazard
Place the fuses near the batteries to protect the charger from short circuits and possible burning.
NOTICE! Damage hazard
Do not reverse the polarity.
Observe the following instructions when connecting the charger:
• Select the appropriate connection variant,
Connection variant
• Use suitable measuring instruments:
• Multimeter with DC voltage measurement, 200 V or autoscale
• Amperometric clamp with direct measurement (100 A scale or higher)
• Always connect the charger before connecting the batteries.
• Do not use ferrules. Strip the cable ends as follows:
• Signal cable 12 mm (0.5 mm² ... 1.5 mm²)
• Charging cable 15 mm
Fig.  on page 5
Table 5: General connection diagram
No.
1
2
1. Connect the negative pole of the starting battery to
2. Connect the fuse holder to the positive pole of the starting battery.
3. Connect the other end of the fuse holder to
4. Insert a fuse into the fuse holder.
5. Connect the fuse holder to the positive pole of the house battery .
6. Connect the other end of the fuse holder to
7. Insert the output fuse into the fuse holder.
8. Connect the D+ or ignition+ signal wire to PIN 1 of the terminal block.
9. Optional: Connect the output voltage control positive signal cable (+SENSE) from PIN 2 of the terminal block
to the positive pole of the house battery, and the negative signal cable (-SENSE) from PIN 3 of the terminal block
D, Connection variant E.
Description
Alternator
TD283 touch display (accessory)
House battery
Starting battery
Connection variant A, Connection variant
GND
.
INPUT
.
OUT
.
MT LB EN
B, Connection variant C,
17