6RL SERIES OPERATION MANUAL
SECTION 6: FRONT PANEL OPERATION
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2018 by Adaptive Power Systems, Inc. (APS) • All Rights Reserved • No reproduction without written authorization from APS.
6RL Series Regenerative DC Load Operation Manual
Page 81 of 204
6.5.3
Remote Control using Analog Interface (AI)
The built-in, galvanically isolated, 15-pole analog interface (short: AI) is on the backside of
the unit offers the following possibilities:
Remote control of current, voltage, power and internal resistance
Remote status monitoring (CC/CP, CV)
Remote alarm monitoring (OT, OVP, PF)
Remote monitoring of actual values
Remote on/off switching of the DC Input
6.5.3.1
General Information
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 cannot be set via the
AI and therefore must be adapted to the given situation before the AI will be in control.
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 unit
setup. See section 6.4.3.2, “General Settings Menu” on page 67 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 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.
Input of excess signals (e.g. >5 V in selected 5 V range or >10 V in the 10 V range) are clipped
by the unit by setting the corresponding set value to 100%.
Important notes about the use of the interface:
After powering the unit and during the start phase the AI signals undefined statuses on the
output pins such as ERROR or OVP. Those must be ignored until is ready to work.
Analog remote control of the unit 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, check to
make sure 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
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