Elektro-Automatik EL 9080-170 B Betriebsanleitung Seite 180

3.11.1.4 Wiring and set-up of the master-slave bus
The master-slave connectors are built-in and must first be connected via network cables (≥CAT3, patch cable) and
then MS can be configured manually (recommended) or by remote control. The following applies:
• A maximum 16 units can be connected via the bus: 1 master and up to 15 slaves.
• Only connect devices of same kind, i.e. electronic load to electronic load, and same model, such as EL 9080-
170 B to EL 9080-170 B.
• The units at both ends of the bus must be terminated (see below)
The master-slave bus must not be wired using crossover cables!
Later operation of the MS system implies:
• The master unit displays, or makes available to be read by the remote controller, the sum of the actual values
of all the units
• The ranges for setting values on the master are adapted to the total number of units, thus, if e.g. 5 units each with
a power of 4.8 kW are connected together to a 24 kW system, then the master can be set in the range 0...24 kW.
• Slave units will show the alarm "MSP" in the display as long as they not have been initialised by the master. The
same alarm is signalled after a connection drop to the master unit occurred.
• In case the function generator of the master unit is going to be used, the Share bus must be connected as well
► How to connect the master-slave bus
1.
Switch off all units that are to be connected and connect them together with a network cable (CAT3 or bet-
ter, not included). It doesn't matter which of the two master-slave connection sockets (RJ45, backside) is
connected to the next unit.
2.
Also connect all units at the DC side.
3.
The two units at the beginning and end of the chain should be terminated, if long connection cables are
used. This is achieved using a 3-pole DIP switch which is positioned on the rear side of the unit next to the
MS connectors.
Now the master-slave system must be configured on each unit. It is recommended to configure first all the slave
units and then the master unit.
► Step 1: Configuring all slave units (standard models with TFT display)
1.
Enter then GENERAL SETTINGS and press
2.
Activate the MS mode with touch area
knowledged with OK, otherwise the change will be reverted.
3.
Accept the settings with the touch area
► Step 1: Configuring all slave units (EL 9000 B Slave series models without display)
1.
Connect the Slave series model via the rear USB port interface to a PC.
2.
Start the software EA Power Control (included with the device on USB stick) and let the software find the
device.
3.
Open app "Settings" for the particular unit, change to tab "Master-Slave" and there set the parameter "Master-
slave mode" to "SLAVE".
The slave is then configured for master-slave. Repeat the procedure for all other slave units.
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Germany
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EL 9000 B Series
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