© EA Elektro-Automatik in 2022, this information is subject to change without notice
65
06230920_manual_ps_10000_3u_15kw_en_01
3.10.1.3 Wiring the Share bus
The Share bus is wired from unit to unit with standard BNC cables (coaxial, 50 Ω type) with a length of 0.5 m (1.64 ft) or similar.
Both sockets are internally connected and are not specifically input or output. The labeling is only for orientation.
3.10.1.4 Wiring and set-up of the digital master-slave bus
The master-slave connectors are built-in and can be connected via network cables (≥CAT3, patch cable). After this, MS can
be configured manually (recommended) or by remote control. The following applies:
•
A maximum of 64 units can be connected via the bus: 1 master and up to 63 slaves.
•
Connection only between devices of same kind, i.e. power supply to power supply; connection of different power classes
is allowed and supported, e. g. one 15 kW 3U with one 30 kW 4U to achieve a total of 45 kW, but requires to have at least
firmware KE/HMI 3.02 installed on all units
•
Linking different series is supported, but limited to:
•
PS 10000 series models can be used as slave units for PSI 10000 series models being the master unit
•
Units at the end of the bus should be terminated, if necessary (see below for more information)
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.) of the master are adapted to the total number
of units. Thus, if e.g. 5 units each with a power of 15 kW are connected together to a 75 kW system, then the master can
be set in the range 0...75 kW.
•
Slaves are no operable as long as being controlled by the master
•
Slaves which haven’t yet been initialized by the master will show the alarm
MSP
in the display. The same alarm is signaled
upon MS bus errors.
►
How to connect the digital master-slave bus
1.
Switch off all units and connect the master-slave bus with network cables (CAT3 or better, cables not included). It
doesn’t matter which of the two master-slave sockets (RJ45, backside) is connected to the next unit.
2.
Depending on the desired configuration the units are then also connected at their DC terminals.
The two units at the beginning and end of the chain must be terminated, while the master
requires a separate setting. See table below.
Termination is done with internal electronic switches which are controlled from within the
Settings
menu of the device in group
Master-slave
. This can be done as part of setting up
every unit as master or slave, but should be done before the master is going to be set as
Master
, because doing so immediately triggers a bus initialization. In group
Master-Slave
the termination resistors for BIAS and the bus itself (TERM, see figure to the right) can be
set separately. Settings matrix for the units on the MS bus:
Device position
Termination setting(s)
Master (at end)
BIAS + TERM
Master (central)
BIAS
Slave (at end)
TERM
Slave (central)
-
R
R
+
B
A
BIAS
BIAS
MS
Bus
R
TERM
