Bedienungsanleitung Victron MultiPlus 24 5000 120-100 (Seite 12 von 162) (Deutsch, Englisch, Holländisch, Französisch, Spanisch, Schwedisch)

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4.4 Optional Connections

A number of optional connections are possible:

4.4.1 Second Battery

The MultiPlus has a connection for charging a starter battery. For connection see Appendix A.

4.4.2 Voltage Sense

Two sense wires may be connected to compensate possible battery cable losses during charging. Use wires of at least 0.75mm2. For

connection see Appendix 0.

4.4.3 Temperature Sensor

The temperature sensor supplied with the product may be used for temperature-compensated charging (see Appendix A). The sensor is

isolated and must be mounted on the batteries minus pole.

4.4.4 Remote Control

The product can be remotely controlled in two ways.

- With an external switch (connection terminal L, see appendix A). Operates only if the switch on the MultiPlus unit is set to “on”.

- With a Multi Control panel (connected to one of the two RJ48 sockets B, see appendix A). Operates only if the switch on the MultiPlus

is set to “on”.

Only one remote control can be connected, i.e. either a switch or a remote control panel.

4.4.5. Programmable relays

The relays can be programmed for all kinds of applications, for example as a starter relay for a generating set.

4.4.6 Programmable analog/digital input/output ports

These ports can be used for several purposes. One application is communication with the BMS of a lithium-ion battery.

4.4.7 Auxiliary AC output (AC-out-2)

Besides the usual uninterruptable output, a second output (AC-out-2) is available that disconnects its load in the event of battery

operation. Example: an electric boiler or air conditioner that is allowed to operate only if the genset is running or shore power is

available.

In case of battery operation, AC-out-2 is switched off immediately. After the AC supply has become available, AC-out-2 is reconnected

with a delay of 2 minutes, this to allow a genset to stabilise prior to connecting a heavy load.

4.4.8 Parallel Connection

The MultiPlus can be connected in parallel with several identical devices. To this end, a connection is established between the devices

by means of standard RJ45 UTP cables. The system (one or more MultiPlus units plus optional control panel) will require subsequent

configuration (see Section 5).

In the event of connecting MultiPlus units in parallel, the following requirements must be met:

- A maximum of six units connected in parallel (per phase).

- Only identical devices may be connected in parallel.

- The DC connection cables to the devices must be of equal length and cross-section.

- The AC input cables to each unit as well as the AC output cables to each unit must also be of equal length and cross-section (length to

AC input may be different from length to AC output).

Additionally the AC input and output cables to each unit should have a minimum resistance of 4 milliohm (in oder to prevent excessive

AC current unbalance between parallel units due to differeces of terminal and relay contact resistance).

As a result the minimum length of the AC input and output cables is as follows:

Cable cross section 6 mm² (9 AWG): min. length 0,7 meter

Cable cross section 10 mm² (7 AWG): min. length 1,2 meter

- If a positive and a negative DC distribution point is used, the cross-section of the connection between the batteries and the DC

distribution point must at least equal the sum of the required cross-sections of the connections between the distribution point and the

MultiPlus units.

- Place the MultiPlus units close to each other, but allow at least 10 cm for ventilation purposes under, above and beside the units.

- UTP cables must be connected directly from one unit to the other (and to the remote panel). Connection/splitter boxes are not

permitted.

- A battery-temperature sensor need only be connected to one unit in the system. If the temperature of several batteries is to be

measured, you can also connect the sensors of other MultiPlus units in the system (with a maximum of one sensor per MultiPlus).

Temperature compensation during battery charging responds to the sensor indicating the highest temperature.

- Voltage sensing must be connected to the master (see Section 5.5.1.4).

- Only one remote control means (panel or switch) can be connected to the system.

4.4.9 Three-phase operation

The MultiPlus can also be used in 3-phase wye (Y) configuration. To this end, a connection between the devices is made by means of

standard RJ45 UTP cables (the same as for parallel operation). The system (MultPlus units plus an optional control panel) will require

subsequently configuration (see Section 5).

Pre-requisites: see Section 4.4.8.

Note: the MultiPlus is not suitable for 3-phase delta (Δ) configuration.

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