Operation Manual

side will be the half of the output side ( input voltage doubles so

input current halves). With the SB 1120AU and SB 2210AU the

input and output currents remains almost the same.

Formula for the calculation of the optimum cable size:

Current (Amp.) x distance in meters x 0,2 = cable size in mmq

Example calculation output: de distance from a SP 1220AU to

consumers is 1,5 meters. The maximum output current that flows

through the cable is 20Amp. The formula:

20 x 1,5 x 0,2 = 6 mmq

Example calculation input: the distance from battery to a SP

1220AU is 0,5 meters. In this case the calculation should be

based on a input current of 40Amp. The formula:

40 x 0,5 x 0,2 = 4 mmq

Connection

1. Connect a red cable on the ‘DC input’ side to

the positive pole and a black cable to the

negative pole of the battery. Make sure that

the correct cable is connected to the correct

pole. The converter will become defective if

the poles are reversed. In this case the

reparation cost are not covered by the guarantee.

2. After connection to the battery the

consumers can be connected to the

‘DC output’. All converter have two

output terminals, which are internally

connected. If more consumers should be

connected, then use a manifold. Make sure