LDA 420 English Tech.
Manual PDF format.
LDA 420 English Tech.
Manual PDF format.
Ver. 5.00 - Rel. 01 June 2004.
LDA 08 card is a powerfull
and low cost Single Euro card, provided with BUS Abaco®
interface. This card belongs to the analog peripherals units and,
in specific, its purpose is to provide eight Digital to
Analog conversion lines that generateas many 4÷20
mA signals, with 16 bit of resolution. The output analog
signals are available on comfortable screw terminal, quick release
connectors, placed on the front side of the card, that simplify
and speed connections.
The eight analog signals generation is managed by eight indipendent
D/A Converter circuits and by eight different protection
and filter circuits: this feature ensures a complete separation
of the signals and increased noisy immunity. The LDA 420
modularity lets the user order the card with a variable number
of analog outputs, obtaining an increased cost reduction accorded
to requirements of the application to develop. So the card can
be ordered in the following combinations: LDA 420, LDA
420/4, LDA 420/6 and LDA 420/8 with two, four,
six and eight 4÷20 mA outputs respectively.
Indipendently from chosen configuration, the card is always provided
of one power supply input for analog section, still connected
to a screw terminal connector. The choice to use an external power
supply voltage for the analog section avoids each power dissipation
problems and allows the user to select the supply voltage of the
current loop controlled by the card; this extends its possible
application fields.
There are other really interesting features of LDA 420
as the galvanic separation between analog section and control
logic section, that allows card use inside electric noisy industrial
environments, and the presence of a local CPU that simplify
and speed up the software management. The card functionalities
are defined by the Firmware executed by this CPU
and they can be easily increased even according with customer
requirements. For example it can be provided the autonomous generation
of ramps, of analog profiles predefined, repeated settings, proportional
settings, etc.
LDA 420 card can be parallel driven through any GPC®
xxx board connected to Abaco® BUS, and takes
as low as 2 contiguous bytes in the addressing space, or
serial driven by any system provided of a programmable asyncronous
line.
- Single Euro format, with 100x160 mm dimension
- 8 separated sections of D/A conversion, based on AD 420 component, 16 Bits resolution, with active 4÷20 mA output on furnished analog power supply voltage
- 8 different Protection and Filter circuits
-Wide range power Supply input for Analog Section: 12÷32 V, 210 mA max
- 8 Screw Terminal Quick Release, 2 pin connectors for generated analog signals
- 1 Screw Terminal Quick Release, 2 pin connector for analog section power supply, not compatible with the analog output ones
- Galvanic Separation between analog section and control logic section
- Four different Configurations can be ordered, equipped wit 2, 4 ,6, 8 analog outputs
- 8 ways Dip Switch for configuration and settings
- Visualization, through coloured LEDs, of the card status
- Asynchronous TTL Serial interface with configurable physic protocol
- Direct parallel interface to Abaco® Industrial BUS
- On board CPU that manages the analog sections through commands received from Serial or Parallel interface
- GNET logic communication protocol that allows the use of many units as slave devices connected on a serial line
- Management firmware complete of 10 general purpose Commands and with possibility to add interesting high level functions
- 8 ways Dip Switch to set the allocation address of the card
- Used addressing space: 2 byte
- Nornal addressing range of 256 byte
- Single power supply for control logic: +5 Vdc, 130 mA
- Supplied with Demo Programs that simplify and speed the card use with each programmable external systems
Data Sheet LDA 420, Rel. 04.02
