User manual

Page 41
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
EL 9000 T Series
3.5.4.3 Acknowledging device alarms
Device alarms (see 3.6.2) 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 input will be switched off
the same way as in manual control. While alarms like OT (overtemperature), PF (power fail) and OV (overvoltage)
can be monitored via the corresponding pins of the interface, other alarms like overcurrent (OC) can’t. Those could
only be 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 „3.6.2. 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).
3.5.4.4 Analog interface specication
Pin Name Type* Description Default levels Electricalspecication
1 VSEL AI Set voltage value
0…10 V or. 0...5 V corre-
spond 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 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 /PF DO
Overheating alarm
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.ow+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 corre-
spond 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 corre-
spond to 0..100% von P
Nom
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 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 input OFF
(DC input 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.ow+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
*** AC supply blackout or PFC failure or supply undervoltage
**** 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