User Manual

Page 49
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
ELR 9000 Series
3.4.3.2 General
One of the plug-in and retrottable modules listed in 3.4.3.1 can be installed. It can take over remote control of
the device alternatively to the built-in USB type B on the back side or analog interface. For installation see section
„1.10.8. Interface module slot“ and separate documentation.
The modules require little or no settings for operation and can be directly used with their default conguration.
All specic settings will be permanently stored such that, after changeover between the various models, no re-
conguration will be necessary.
Via the digital interface primarily the set values (voltage, current, power) and device conditions can be set and
monitored. Furthermore, depending on the interface module used, various other functions are supported as de-
scribed in separate programming documentation.
Changing to remote control will retain the last set values for the device until these are changed. Thus a simple
voltage control by setting a target value is possible without changing any other values.
3.4.3.3 Programming
Programming details for the interfaces, the communication protocols etc. are to be found in the documentation
“Programming Guide ModBus & SCPI“ on the included CD.
3.4.4 Remote control via the analog interface (AI)
3.4.4.1 General
The built-in, galvanically separated, 15-pole analog interface (AI) is on the back side of the device offers the fol-
lowing possibilities:
• Remote control of current, voltage and power
• Remote status monitoring (CC/CP, CV)
• Remote alarm monitoring (OT, OVP)
• Remote monitoring of actual values
• Remote on/off switching of the DC input
Setting the three set values via the analog interface always takes place concurrently. It means, that for example
the voltage can not be given via the AI and current and power set by the rotary knobs, or vice versa.
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 is put in operation. Analog set values can be fed in by an ex-
ternal voltage or generated by the reference voltage on pin 3. As soon as remote control via the analog interface
is activated, the values displayed will be those provided by the interface.
The AI can be operated in the common voltage ranges 0...5V and 0...10V in each case 0...100% of the nominal
value. The selection of the voltage range can be done in the device setup. See section „3.3.3. Conguration via
MENU“ for details. The reference voltage sent out from Pin 3 (VREF) will be adapted accordingly and is then:
0-5V: Reference voltage = 5V, 0...5V set values (VSEL, CSEL, PSEL) correspond to 0...100% nominal values,
0...100% actual values correspond to 0...5V at the actual value outputs (CMON, VMON).
0-10V: .Reference voltage = 10V, 0...10V set values (VSEL, CSEL, PSEL) correspond to 0...100% nominal values,
0...100% actual values correspond to 0...10V at the actual value outputs (CMON, VMON).
Input of excess set values (e.g. >5V in selected 5V range or >10V in the 10V range) are clipped by setting the set
value at 100%.
Notes for use of the interface.
• Analog remote control of the device must be activated by switching pin “REMOTE” (5) rst
• Before the hardware that will control the analog interface is connected, all wiring should be laid and the hardware
is to be checked that it can generate no voltage >12V.
The analog interface is galvanically separated from DC input. Therefore do not connect
an ground from the analog interface to the DC- or DC+ input!