User Manual

Page 52
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
PSB 9000 2.5 kW Series
3.6.3.2 General information about the interface modules
WiththestandardmodelsofseriesPSB9000,oneoftheplug-inandretrottablemoduleslistedin3.6.3.1 can be
installed. It can take over remote control of the device alternatively to the built-in USB type B on the back side or
analog interface. For installation see section „2.3.9. Installation of an interface module“ and separate documentation.
Themodulesrequirelittleornosettingsforoperationandcanbedirectlyusedwiththeirdefaultconguration.All
specicsettingswillbepermanentlystoredsuchthat,afterchangeoverbetweenthevariousmodels,norecong-
uration will be necessary.
3.6.3.3 Programming
Programming details for the interfaces, the communication protocols etc. are to be found in the documentation
“Programming Guide ModBus & SCPI“ which is supplied on the included USB stick or which is available as down-
load from the manufacturer’s website.
3.6.4 Remote control via the analog interface (AI)
3.6.4.1 General
Thebuilt-in,galvanicallyisolated,15-poleanaloginterface(short:AI)isonthebacksideofthedeviceo󰀨ersthe
following possibilities:
• Remote control of current, voltage, power and resistance
• Remote status monitoring (CV, DC terminal)
• Remote alarm monitoring (OT, OVP, PF, OCP, OPP)
• Remote monitoring of actual values
• Remoteon/o󰀨switchingoftheDCterminal
Setting the three set values of voltage, current and power via the analog interface must always be done concur-
rently. It means, that for example the voltage can’t be given via the AI and current and power set by the rotary
knobs, or vice versa. The internal resistance set value can additionally be adjusted. Contrary to manual adjustment
orviadigitalinterface,theanaloginterfacedoesn’to󰀨erseparatesetvaluesofpowerandcurrentforthesource
and sink mode.
Analog set values can be supplied by an external voltage or generated from the reference voltage on pin 3. As
soon as remote control via the analog interface is activated, the displayed set values will be those provided by the
interface. The AI can be operated in the common voltage ranges 0...5 V and 0...10 V, both representing 0...100%
of the nominal value. The selection of the voltage range can be done in the device setup. See section „3.5.3. Con-
guration via MENU“ for details. The reference voltage sent out from pin 3 (VREF) will be adapted accordingly:
0-5 V: Reference voltage = 5 V, 0...5 V set value signal (VSEL, CSEL, PSEL, RSEL) correspond to 0...100% rated
value (exception: R
Min
...R
Max
for resistance) and 0...100% of the actual values correspond to 0...5 V at the actual
value outputs CMON and VMON.
0-10 V: Reference voltage = 10 V, 0...10 V set value signal (VSEL, CSEL, PSEL, RSEL) correspond to 0...100%
rated value (exception: R
Min
...R
Max
for resistance) and 0...100% of the actual values correspond to 0...10 V at the
actual value outputs CMON and VMON.
Input of excess signals (e. g. >5 V in selected 5 V range or >10 V in the 10 V range) are clipped by the device by
setting the corresponding set value to 100%.
The OVP set value and other supervision (events) and alarm thresholds can’t be set via the AI and therefore must
be adapted to the given situation before the AI is going to be in control.
Before you begin, please read these important notes about the use of the interface:
After powering the device and during the start phase the AI signals undened statuses on the
output pins. Those must be ignored until is ready to work.
• AnalogremotecontrolofthedevicemustbeactivatedbyswitchingpinREMOTE(5)rst.Onlyexceptionispin
REM-SB, which can be used independently
• Before the hardware is connected that will control the analog interface, it shall be checked that it can’t provide
voltagetothepinshigherthanspecied
• Set value inputs, such as VSEL, CSEL, PSEL and RSEL (if R mode is activated), must not be left unconnected
(i.e.oating)duringanalogremotecontrol.Incaseanyofthesetvaluesisn’tusedforadjustment,itcanbetied
toadenedlevelorconnectedtopinVREF(solderbridgeordi󰀨erent),soitgives100%
• Switching between sink and source mode can only be done with the voltage level on pin VSEL. Also see example
d) in 3.6.4.7.