Rev 20.11.2019
V1.07 - Page 21
Subject to modifications!
romutec Steuer.-und Regelsysteme GmbH Jochsberger Straße 39 D-91592 Buch am Wald
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Subject to technical changes
5.7 Analog output module 8 AO eco
The analog output module
romod 8 AO eco
is
a Remote I/O Device which is used to provide
eight 0-10V control signals. These may be
utilized, e.g., for controlling heating valves,
dampers or frequency converters etc.
The analog 0-10V outputs are provided by the
module via terminals. The reference potential for
the analog outputs is available at the GND
terminals. For two AOs there is available one
GND terminal in each case. All ground pins are
connected to each other internally and to the
GND of the power supply, as well.
All analog outputs can be configured so that they
will assume a defined state (‘safe state’) if the
module has not received valid bus telegrams via
the MODBus for a certain time. These
predefined states are set separately for each
output, whereas the time until activating the safe
state is common for all outputs of a module.
Note: The time for triggering the 'safe state'
should not be too short in order to avoid
malfunctions as they can occur, e.g., when
another device which is connected to the bus
fails and will so cause time-outs.
Regarding the system configuration (addressing, maximum number of modules connected to a MODBus
Master interface, installation, connection to the bus etc.), please follow the instructions in the chapter
Configuration
.
Important technical data:
Power supply:
24 V AC or DC, connection via terminals
Current consumption:
max. 120 mA (DC), 160 mA (AC) with all analog outputs loaded
Capacity of the outputs
10 mA each (short circuit proof)
Resolution AO
10 Bit
Linearity error
< +/- 2%
