Baelz Automatic BA 375-E42 - 7. DIGITAL POSITIONER 7020 A

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Motorized Rotary Actuator baelz 375-E42
7. DIGITAL POSITIONER 7020A
7.1 Intended use
The digital positioner baelz 7020A controls the actuator according to the value of the control
signal:0(2)-10V,0(4)-20mA
Toensureuseforthepurposeintended,checkthattheabovetypeidenticationcorresponds
tothenameplateonthepositionerbeforestartinganyactivities.Thetechnicalspecicationsof
the positioner and the power supply requirements are the indicated on the name plate.
Any use other than the intended use stated above, use for different tasks, and operation
with other power sources than those permitted, is considered to be improper use. In case of
improper use, the operator shall be solely liable for the risk presented to persons and to the
device as well as to other property!
The intended use also comprises compliance with the accident prevention regulations and
theDINVDEstandardsoftheGermanInstituteforStandardizationandtheAssociationfor
Electrical, Electronic & Information Technologies. It also implies working in accordance with the
safety requirements when performing all activities described in these operating instructions,
under consideration of general technical rules and regulations.
7.2 Operational modes and operating options
For further information and additional functions, see baelz 7020 operating instructions.
7.2.1 Standard operation using DIP switches
TheDIPswitchescanbeusedtocarryoutstandardcongurationsandoperations(see
section 7.4).
When DIP switch 11 is set to 0, the 7020A is in the standard operational mode.
In standard mode, all DIP switches are active and the functions of the Baelz 7020A can be
individuallyadapted.Functionswhicharepredenedandunalterableinstandardmodeare
described in section 6.1 of the baelz 7020 operating instructions.
7.2.2 Standard operation using Modbus VT100 or direct addressing
In standard mode, the Baelz 7020A can be operated using Modbus VT100. For this, a virtual
7020A display and a virtual 7020A keypad are transmitted to a user interface. Modbus direct
addressing, e.g. from a building automation system, enables access to status information and
allowsoperationandconguration.(Seebaelz7020operatinginstructions,AppendixA).The
settings given by the DIP switches remain active. Values which are only relevant in Modbus
mode can be adjusted in standard mode, but only take effect in Modbus mode.
7.2.3 Modbus mode
When DIP switch 11 is set to 1, the Baelz 7020A is in Modbus mode. In Modbus mode, the
7020AisatitsmostexibleandcanbeconguredandoperatedusingeitheraModbusVT100
or Modbus direct addressing, for example in a building automation system. See separate
operating instructions "Baelz 7020 Digital Positioner - Operating Instructions for Modbus mode"
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