Page 58
EPS Stromversorgung GmbH
Alter Postweg 101 • 86159 Augsburg
Germany
Fon: +49 821 / 570451-0
Fax: +49 821 / 570451-25
www.eps-germany.de
PSI 9000 2U 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. 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
), 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 some alarms, like overtemperature can be monitored via the corresponding
pin of the interface other alarms, like overpower 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 (OVP, OCP and OPP) have to be acknowledged (see
„3.6.2. Device alarm and event han
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
Levels
Electrical specification
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 Ground for all digi-
tal signals
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 OT / PF
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
(1
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 < 0.2% 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 Ground for all
analog signals
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 OVP
DO Overvoltage alarm Alarm OV = HIGH, U
High
> 4 V
No alarm OV = 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 CV
DO Constant voltage
regulation active
CV = LOW, U
Low
<1 V
CC/CP/CR = HIGH, U
High
>4 V
* AI = Analog Input, AO = Analog Output, DI = Digital Input, DO = Digital Output, POT = Potential ** Internal Vcc approx. 10 V
*** Mains blackout, mains undervoltage or PFC error **** 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
1)
Unless the device has not already been delivered with KE firmware 2.10 or higher, using resistance mode via analog interface first requires hardware retrofit
-
ting from the manufacturer
