Rev 20.11.2019
V1.07 - Page 11
Subject to modifications!
romutec Steuer.-und Regelsysteme GmbH Jochsberger Straße 39 D-91592 Buch am Wald
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Subject to technical changes
5.2 Digital output module with MOSFET outputs 8 DO eco
The digital output module
romod 8 DO eco
is a
Remote I/O Device which is used to control eight
1-stage motors, or other digital actuators.
The digital MOSFET outputs are provided by the
module via terminals. They are ground
referenced, + 24VDC.
The source voltage for the DOs is also
connected via terminals and must be +24 volts
(DC). The two supply terminals are connected
with each other internally, but not with the
24 V power supply, i.e. there must be applied
a source voltage for the outputs in any case.
All digital 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:
typically 21 mA (DC), 60 mA (AC), outputs WITHOUT any load
Specifications digital outputs:
MOSFET, ground referenced (source operation mode +24 VDC)
Output current
5 ... 500 mA (leakage current max. 0.1 mA)
The load resistance shall not be less than 48
Ω.
Voltage drop
max. 0.4 V at 0.5 A
Inductive loads
should be avoided as far as possible, or be suppressed at the source,
respectively.
