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EPS Stromversorgung GmbH
Alter Postweg 101 • 86159 Augsburg
Germany
PSI 9000 3U Series
Fon: +49 821 / 570451-0
Fax: +49 821 / 570451-25
3.5.4.2 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 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.
All device alarms (OT, OV, PF, 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).
3.5.4.3
Analog interface specification
Pin Name
Type* Description
Default levels
Electrical properties
1
VSEL
AI
Set voltage value
0…10 V or. 0...5 V corre
-
spond to 0..100% of U
Nom
Accuracy < 0.2% *****
Input impedance R
i
>40 k...100 k
2 CSEL
AI
Set current value
0…10 V or. 0...5 V corre
-
spond 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
digital 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
DO Overheating or
power fail*** alarm
Alarm OT= HIGH, U
High
> 4 V
No Alarm OT= 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
-
-
-
-
-
8 PSEL
AI
Set power value
0…10 V or. 0...5 V corre
-
spond to 0..100% von P
Nom
Accuracy < 0.2% *****
Input impedance R
i
>40 k...100 k
9
VMON
AO Actual voltage
0…10 V or. 0...5 V corre
-
spond 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 corre
-
spond to 0..100% von I
Nom
11 AGND
POT Ground for all
analog signals
For -SEL, -MON, VREF Signals
12 -
-
-
-
-
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 over- or 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
3.5.4.4 Overview of the Sub-D Socket
