Selecting The Regulation Speed; Crossflow Adjustment (Two-Quadrant Operation); Remote Sense; Pin Assignment Of Terminal System Bus - Elektro-Automatik EL 9000 A Bedienungsanleitung

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Handling the device
6.11.2 Selecting the regulation speed
The regulation speed (or time) of the load has deliberately
been set to slow and lies at typical 50ms (only for CV and
CP mode). By this setting it is accomplished that critical
feeding sources like power supplies with unknown regu-
lation characteristics can be loaded steadily and run free
from unwanted oscillation. The dynamics is then situated
at the given minimal regulation time. See „2. Technical
specifications", section „Dynamics".
If a better regulation dynamics is required, it can be ac-
tivated by switching the load to fast regulation. This is
done at the terminal System Bus, Pin 7 (FastReg) and
6 (AGnd). If these pins are shorted, the fast regulation
becomes active. By default, the slow regulation is active.
Changing this configuration must only happen while the
load is completely switched off from the mains!
6.11.3 Crossflow adjustment (two-quadrant operation)
Using two-quadrants operation, i.e. running a load in
combination with a power supply, necessarily requires
the use of the Share Bus, whereby the load controls the
power supply. The pins 2 (I-Cross) and 3 (I-Cross-Rtn)
of the terminal System Bus are used to connect a resi-
stor (0,25W) which injects a crossflow current between
the power supply and the load. This current effects that
load and power supply are permanently active and thus
can react faster to set value changes. Following applies:
R = 0 --> Crossflow current approx. 10% of nom. current
of the device
R = infinite --> Crossflow current = 0 (default)
The crossflow current can be continuously adjusted with
the resistor from 0 to 10% of the nominal current of the
load.
In practice, this is only used in a little number of special
applications where extremely fast load changes are re-
quired between the two quadrants. Common applications
like, for example, automotive start-up transients after
DIN40839 do not require this feature.
6.11.4 Remote sense
The remote sense feature is described in section „5.
Installation".
6.11.5 Pin assignment of terminal System Bus
Pin 1 = Sense (+)
Pin 2 = I-Cross
Pin 3 = I-Cross-Rtn
Pin 4 = Sense (-)
Pin 5 = Share Bus
Pin 6 = AGnd
Pin 7 = FastReg
Instruction Manual
42
Date: 11-16-2011
EL 9000 A Series