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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
In case of a device alarm occurring during remote control via analog interface, the DC input will be switched off the
same way as in manual control. Alarms are signalled either on pin ALARMS 1 or ALARMS 2, as configured in the
MENU (see section „3.4.3. Configuration via MENU"). In case several alarms occur at once, the particulars ones
can only read from the unit in the display (alarm counter in MENU) or via digital interface.
Some device alarms (OVP, 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 input off and on again, means a HIGH-LOW-HIGH edge (at least 50 ms for LOW), when using
the default level setting for this pin.
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
4 DGND
POT Digital ground
5 REMOTE
DI
Remote control
Overheating alarm /
6 ALARMS 1 DO
Power fail
Set internal resist-
7 RSEL
AI
ance value
8 PSEL
AI
Set power value
9 VMON
AO Actual voltage
10 CMON
AO Actual current
11 AGND
POT Analog ground
12 R-ACTIVE
DI
R mode on / off
DC input OFF
13 REM-SB
DI
(DC input ON)
(ACK alarms ****)
Overvoltage alarm
14 ALARMS 2 DO
Overcurrent alarm
Overpower alarm
Constant voltage
regulation active
15 STATUS*** DO
DC input
* 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 3.4.3.1
**** Only during remote control
***** The error of a set value input adds to the general error of the related value on the DC input of the device
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Default levels
0...10 V or. 0...5 V corre-
spond to 0...100% of U
Nom
0...10 V or. 0...5 V corre-
spond 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= HIGH, U
> 4 V
High
No Alarm = LOW, U
<1 V
Low
0...10 V or. 0...5 V corre-
spond to R
...R
Min
Max
0...10 V or. 0...5 V corre-
spond to 0...100% of P
Nom
0...10 V or. 0...5 V corre-
spond to 0...100% of U
Nom
0...10 V or. 0...5 V corre-
spond to 0...100% of 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 = HIGH, U
> 4 V
High
No alarm = LOW, U
<1 V
Low
CV = LOW, U
<1 V
Low
CC/CP/CR = HIGH, U
>4 V
High
On = LOW, U
<1 V
Low
Off = HIGH, U
>4 V
High
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
EL 9000 B Series
Electrical specification
Accuracy 0-5 V range: < 0.4% *****
Accuracy 0-10 V range: < 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 0-5 V range: < 0.4% *****
Accuracy 0-10 V range: < 0.2% *****
Input impedance R
>40 k...100 k
i
Accuracy 0-5 V range: < 0.4% *****
Accuracy 0-10 V range: < 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
www.elektroautomatik.de
ea1974@elektroautomatik.de
= 30 V
Max
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