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EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
ELR 9000 HP Series
A max. of 16 units can be connected via Share bus.
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 devices of same kind, i.e. electronic load to electronic load, and of the same model, such as ELR 9080-
170 HP to ELR 9080-170 HP.
•
Units at the end 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 the values, adjustment limits, protections (OVP etc.) and user events (UVD etc.) of the
master are adapted to the total number of units. Thus, if e.g. 5 units each with a power of 5 kW are connected
together to a 25 kW system, then the master can be set in the range 0...25 kW.
•
Slaves are no operable as long as being controlled by the master
•
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.
►
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 back side of the unit next to the
MS connectors.
►
Position: not terminated
(default)
Position: fully terminated
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
until reaching
Page 11
.
2.
Activate the MS mode with touch area
. A warning requester will appear which has to be ac-
knowledged with OK, otherwise the change will be reverted.
3.
Accept the settings with the touch area
and return to the main page.
► Step 1: Configuring all slave units (ELR 9000 HP Slave series models without display)
1.
Connect the Slave series model via the rear USB port or via Ethernet 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 the 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.