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EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
PS 9000 T Series
3.5.4.3 Acknowledging device alarms
Device alarms (see
3.6.1
) 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 overcurrent (OC) 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, OC and OP) have to be acknowledged, either by the user of the device or by the control-
ling unit. Also see
„3.6.1. Device alarm 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
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 alarm
or Power Fail
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 -
-
-
-
-
8 PSEL
AI
Set power value
0…10 V or. 0...5 V correspond
to 0..100% von P
Nom
Accuracy 0-5 V range: < 0.4% ****
Accuracy 0-10 V range: < 0.2% ****
Input impedance R
i
>40 k...100 k
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 -
-
-
-
-
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
*** 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