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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
PSI 9000 15U/24U Series
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 when working with the 10 V range. In the 5 V range this resolution halves. 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
) are always indicated in the front display and some of them are also reported as signal
on the analog interface socket (see table below).
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. Some device alarms (OVP, OCP and OPP) have to be acknowledged (see
„3.6.2. Device alarm and event handling“
Acknowledgement during analog remote control is done with pin REM-
SB switching the DC output off and on again, means a HIGH-LOW-HIGH edge (min. 50ms for LOW), when using
the default level setting for this pin.
3.5.4.4
Analog interface specification
Pin Name
Type* Description
Default levels
Electrical specifications
1
VSEL
AI
Set voltage value
0…10 V or. 0...5 V correspond
to 0..100% of U
Nom
Accuracy 0-5 V range: < 0.4% *****
Accuracy 0-10 V range: < 0.2% *****
Input impedance R
i
>40 k...100 k
2 CSEL
AI
Set current value
0…10 V or. 0...5 V correspond
to 0..100% of I
Nom
3
VREF
AO Reference voltage
10 V or 5 V
Tolerance < 0.2% at I
max
= +5 mA
Short-circuit-proof against AGND
4 DGND
POT Digital ground
For control and status signals.
5
REMOTE
DI
Switching internal /
remote control
Remote = LOW, U
Low
<1 V
Internal = HIGH, U
High
>4 V
Internal = Open
Voltage range = 0…30 V
I
Max
= -1 mA bei 5 V
U
LOW to HIGH typ.
= 3 V
Rec’d sender: Open collector against DGND
6 ALARMS 1
DO Overheating or
power fail alarm
Alarm = HIGH, U
High
> 4 V
No Alarm = LOW, U
Low
<1 V
Quasi open collector with pull-up against Vcc **
With 5 V on the pin max. flow +1 mA
I
Max
= -10 mA at U
CE
= 0,3 V
U
Max
= 30 V
Short-circuit-proof against DGND
7
RSEL
AI
Set internal resist-
ance value
0…10 V or. 0...5 V correspond
to 0..100% of R
Max
Accuracy 0-5 V range: < 0.4% *****
Accuracy 0-10 V range: < 0.2% *****
Input impedance R
i
>40 k...100 k
8 PSEL
AI
Set power value
0…10 V or. 0...5 V correspond
to 0..100% von P
Nom
9
VMON
AO Actual voltage
0…10 V or. 0...5 V correspond
to 0..100% von U
Nom
Accuracy 0-5 V range: < 0.4% *****
Accuracy 0-10 V range: < 0.2% *****
at I
Max
= +2 mA
Short-circuit-proof against AGND
10
CMON
AO Actual current
0…10 V or. 0...5 V correspond
to 0..100% von I
Nom
11 AGND
POT Analog ground
For -SEL, -MON, VREF Signals
12
R-ACTIVE
DI
R mode on / off
On = LOW, U
Low
<1 V
Off = HIGH, U
High
>4 V
Off = Open
Voltage range = 0…30 V
I
Max
= -1 mA bei 5 V
U
LOW to HIGH typ.
= 3 V
Rec’d sender: Open collector against DGND
13
REM-SB
DI
DC output OFF
(DC output ON)
(ACK alarms ****)
Off = LOW, U
Low
<1 V
On= HIGH, U
High
>4 V
On = Open
Voltage range = 0…30 V
I
Max
= +1 mA at 5 V
Rec’d sender: Open collector against DGND
14
ALARMS 2
DO
Overvoltage alarm
Overcurrent alarm
Overpower alarm
Alarm = HIGH, U
High
> 4 V
No alarm = LOW, U
Low
<1 V
Quasi open collector with pull-up against Vcc **
With 5 V on the pin max. flow +1 mA
I
Max
= -10 mA at U
CE
= 0,3 V, U
Max
= 30 V
Short-circuit-proof against DGND
15 STATUS*** DO
Constant voltage
regulation active
CV = LOW, U
Low
<1 V
CC/CP/CR = HIGH, U
High
>4 V
DC output
On = LOW, U
Low
<1 V
Off = HIGH, U
High
>4 V
* AI = Analog Input, AO = Analog Output, DI = Digital Input, DO = Digital Output, POT = Potential
** Internal Vcc approx. 10 V
*** Only one of both signals possible, see section
**** Only during remote control
***** The error of a set value input adds to the general error of the related value on the DC output of the device
