Elektro-Automatik PSI 9000 2U Bedienungsanleitung Seite 151

3.5.4.2 Resolution and sample rate
The analog interface is internally sampled and processed by a digital microcontroller. This causes a limited resolu-
tion of analog steps. The resolution is the same for set values (VSEL etc.) and actual values (VMON/CMON) and
is 26214. Due to tolerances, the truly achievable resolution can be slightly lower.
There is furthermore a max. sample rate of 500 Hz. It means, the device can acquire analog set values and states
on digital pins 500 times per second.
3.5.4.3 Acknowledging device alarms
Device alarms (see 3.6.2) are always indicated in the front display and some of them are also reported as signal on
the analog interface socket (see 3.5.4.4), for example the overvoltage alarm (OV), which is considered as critical.
In case of a device alarm occurring during remote control via analog interface, the DC output will be switched off
the same way as in manual control. While alarms OT and OV can be monitored via the corresponding pins of the
interface, other alarms like power fail (PF) can't. Those could only be monitored and detected via the actual values
of voltage and current being all zero contrary to the set values.
Some device alarms (OV, OCP and OPP) have to be acknowledged, either by the user of the device or by the
controlling unit. Also see „3.6.2. Device alarm and event handling". Acknowledgement is done with pin REM-SB
switching the DC output off and on again, means a HIGH-LOW-HIGH edge (min. 50ms for LOW).
3.5.4.4 Analog interface specification
Pin Name Type* Description
1 VSEL AI Set voltage value
2 CSEL AI Set current value
3 VREF AO Reference voltage
Ground for all digi-
4 DGND POT
tal signals
Switching internal /
5 REMOTE DI
remote control
Overheating or
6 OT DO
power fail*** alarm
Set internal resist-
7 RSEL AI
(1
ance value
8 PSEL AI Set power value
9 VMON AO Actual voltage
10 CMON AO Actual current
Ground for all
11 AGND POT
analog signals
R-AC-
12 DI R mode on / off
TIVE
DC output OFF
13 REM-SB DI (DC output ON)
(ACK alarms ****)
14 OVP DO Overvoltage alarm
Constant voltage
15 CV DO
regulation active
* AI = Analog Input, AO = Analog Output, DI = Digital Input, DO = Digital Output, POT = Potential
*** Mains blackout, mains undervoltage or PFC error
related value on the DC output of the device
1) Unless the device has not already been delivered with KE firmware 2.10, resistance mode via analog interface requires retrofitting from the manufacturer
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Levels
0...10 V or. 0...5 V correspond
to 0..100% of U
Nom
0...10 V or. 0...5 V correspond
to 0..100% of I
Nom
10 V or 5 V
Remote = LOW, U <1 V
Low
Internal = HIGH, U >4 V
High
Internal = Open
Alarm OT= HIGH, U > 4 V
High
No Alarm OT= LOW, U <1 V
Low
0...10 V or. 0...5 V correspond
to 0..100% of R
Max
0...10 V or. 0...5 V correspond
to 0..100% von P
Nom
0...10 V or. 0...5 V correspond
to 0..100% von U
Nom
0...10 V or. 0...5 V correspond
to 0..100% von I
Nom
On = LOW, U <1 V
Low
Off = HIGH, U >4 V
High
Off = Open
Off = LOW, U <1 V
Low
On= HIGH, U >4 V
High
On = Open
Alarm OV = HIGH, U > 4 V
High
No alarm OV = LOW, U <1 V
Low
CV = LOW, U <1 V
Low
CC/CP/CR = HIGH, U >4 V
High
**** Only during remote control ***** The error of a set value input adds to the general error of the
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
PSI 9000 2U Series
Electrical properties
Accuracy < 0.2% *****
Input impedance R >40 k...100 k
i
Tolerance < 0.2% at I = +5 mA
max
Short-circuit-proof against AGND
For control and status signals.
Voltage range = 0...30 V
I = -1 mA bei 5 V
Max
U = 3 V
LOW to HIGH typ.
Rec'd sender: Open collector against DGND
Quasi open collector with pull-up against Vcc **
With 5 V on the pin max. flow +1 mA
I = -10 mA at U = 0,3 V
CE
Max
U = 30 V
Max
Short-circuit-proof against DGND
Accuracy < 0.2% *****
Input impedance R >40 k...100 k
i
Accuracy < 0.2% *****
Input impedance R >40 k...100 k
i
Accuracy < 0.2% at I = +2 mA
Max
Short-circuit-proof against AGND
For -SEL, -MON, VREF Signals
Voltage range = 0...30 V
I = -1 mA bei 5 V
Max
U = 3 V
LOW to HIGH typ.
Rec'd sender: Open collector against DGND
Voltage range = 0...30 V
I = +1 mA at 5 V
Max
Rec'd sender: Open collector against DGND
Quasi open collector with pull-up against Vcc **
With 5 V on the pin max. flow +1 mA
I = -10 mA at U = 0,3 V, U
CE
Max
Short-circuit-proof against DGND
** Internal Vcc approx. 10 V
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= 30 V
Max
Page 57