Heinzinger electronic GmbH
Phone: +49 (0) 8031 2458 0
www.heinzinger.com
Anton-Jakob-Str. 4, 83026 Rosenheim
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Page 71
ERS COMPACT
3.6.4
Remote control via the analog interface
3.6.4.1
General
The galvanically isolated, 15-pole analog interface, as built-in with standard models and below referenced in short
form as AI, is located on the rear side of the device offers the following possibilities:
•
Remote control of current, voltage, power and resistance
•
Remote status monitoring (CV, DC terminal)
•
Remote alarm monitoring (OT, OVP, PF, OCP, OPP)
•
Remote monitoring of actual values
•
Remote on/off switching of the DC terminal
Setting the
three
set values of voltage, current and power via the analog interface must always be done concur
-
rently. It means, for example, that the voltage can’t be given via the AI and current and power set by the rotary
knobs or vice versa. The internal resistance set value can additionally be adjusted. Contrary to manual adjustment
or via digital interface, the analog interface doesn’t offer separate set values of power and current for the source
and sink mode.
Analog set values can be supplied by an external voltage or generated from the reference voltage on pin 3. As
soon as remote control via the analog interface is activated, the displayed set values will be those provided by the
interface. The AI can be operated in the common voltage ranges 0...5 V and 0...10 V, both representing 0...100%
of the nominal value. The selection of the voltage range can be done in the device setup. See section
“3.5.3. Con-
figuration via the menu”
for details. The reference voltage sent out from pin 3 (VREF) will be adapted accordingly:
0-5 V
: Reference voltage = 5 V, 0...5 V set value (VSEL, CSEL, PSEL, RSEL) correspond to 0...100% rated value
resp.
R
Min
...R
Max
, 0...100% of the actual values correspond to 0...5 V at the outputs CMON and VMON, at least as
long these two pins are still configured for the default (see section
“3.5.3. Configuration via the menu”
).
0-10 V
: Reference voltage = 10 V, 0...10 V set value (VSEL, CSEL, PSEL, RSEL) correspond to 0...100% rated
value resp.
R
Min
...R
Max
, 0...100% of the actual values correspond to 0...10 V at the outputs CMON and VMON, at
least as long these two pins are still configured for the default (see section
“3.5.3. Configuration via the menu”
).
All set values are always additionally limited to the corresponding adjustment limits (U-max, I-max etc.), which
would clip setting excess values for the DC output. Also see section
“3.5.4. Adjustment limits”
.
Before you begin, please read these important notes about the use of the interface:
After powering the device and during the start phase the AI signals undefined statuses on the
output pins. Those must be ignored until it’s ready to work.
•
Analog remote control of the device must be activated by switching pin REMOTE (5) first. Only exception is pin
REM-SB, which can be used independently
•
Before the hardware is connected that will control the analog interface, it shall be checked that it can’t provide
voltage to the pins higher than specified
•
Set value inputs, such as VSEL, CSEL, PSEL and RSEL (if R mode is activated), must not be left unconnected
(i.e. floating) during analog remote control. In case any of the set values is not used for adjustment, it can be tied
to a defined level or connected to pin VREF (solder bridge or different), so it gives 100%
•
Switching between sink and source mode can only be done with the voltage level on pin VSEL. Also see example
d) in
3.6.4.7
.
3.6.4.2
Acknowledging device alarms
In case of a device alarm occurring during remote control via analog interface, the DC terminal will be switched
off the same way as in manual control. The device would indicate an alarm (see
3.7.2
) in the front display and, if
activated, acoustically and also signal most of them on the analog interface. Which alarms actually are signaled
can be set up in the device configuration menu (see
“3.5.3.1. Sub menu “Settings””
).
Most device alarms have to be acknowledged (also see
“3.7.2. Device alarm and event handling”).
Acknowledg-
ment is done with pin REM-SB switching the DC terminal off and on again, which represents a HIGH-LOW-HIGH
signal (min. 50ms for LOW), when using the default level setting for this pin.
There is one
exception
: the SOVP (Safety OVP) alarm, which is only featured with the 60 V model of this series.
It can’t be acknowledged and requires to power-cycle the device. It can be monitored via the analog interface and
would be indicated by the alarms PF and OVP being signaled at the same time, so it would require to select the
alarm indication on pin 6 to at least signal PF and for pin 14 to signal OVP in any of the combinations.