© EA Elektro-Automatik in 2022, this information is subject to change without notice
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06230820_manual_psi_10000_3u_15kw_en_01
3.5.4
Remote control via the analog interface
3.5.4.1
General
The built-in, galvanically isolated, 15-pole analog interface (below referenced in short form as
AI
) is located on the rear side
of the device and provides the following possibilities:
•
Remote control of current, voltage, power and internal resistance
•
Remote status monitoring (CC/CP, CV, DC output)
•
Remote alarm monitoring (OT, OVP, OCP, OPP, PF)
•
Remote monitoring of actual values
•
Remote on/off switching of the DC output
Setting the set values of voltage, current and power via the analog interface must always be done concurrently. It means, that
for example 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.
The OVP set value and other supervision (events) and alarm thresholds can’t be set via the AI and therefore must be adapted
to the given situation before the AI is taking over control. Analog set values can be supplied from an external voltage source
or can be derived from the reference voltage on pin 3. As soon as remote control via the analog interface is activated, the set
values on the display will be those supplied to 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 rated value. The
selection of the voltage range can be done in the device setup. See section
“3.4.3. Configuration via the menu“
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 signal for VSEL, CSEL, PSEL and RSEL correspond to 0...100% nominal value,
0...100% actual values correspond to 0...5 V at the actual value outputs CMON and VMON.
0-10 V
: Reference voltage = 10 V, 0...10 V set value signal for VSEL, CSEL, PSEL and RSEL correspond to 0...100% nominal
values, 0...100% actual values correspond to 0...10 V at the actual value outputs CMON and VMON.
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
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 is 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 (table in
•
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 isn’t used for adjustment, it can be tied to a defined level or
connected to pin VREF (solder bridge or different)
3.5.4.2
Acknowledging device alarms
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. The device would indicate an alarm (see
3.6.2) in the front display and, if activated, acoustically and also
signal most of them on the analog interface. Which alarms are eventually signaled can be set up in the device configuration
menu (see
“3.4.3.1. Sub menu “Settings”“).
The alarms MSP, OVP, OCP and OPP have to be acknowledged (also see
“3.6.2. Device alarm and event handling“). Acknowl-
edgment is done with pin REM-SB switching the DC output off and on again, thats means a HIGH-LOW-HIGH edge (min.
50ms for LOW), given the default logical level is set for REM-SB.
The same is required for PF and OT in case the related settings
State after PF alarm
or
State after OT alarm
in settings
menu group
DC output
are set to
Off
.
There is one
exception
: the SOVP (Safety OVP) alarm, which is only featured with the 60 V models 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.
