Rev 20.11.2019
V1.07 - Page 17
Subject to modifications!
romutec Steuer.-und Regelsysteme GmbH Jochsberger Straße 39 D-91592 Buch am Wald
www.romutec.de
Subject to technical changes
5.5 Digital output module with relay outputs 4 DO-R eco
The digital output module
romod 4 DO-R eco
is
a Remote I/O Device which is used to control
four lighting circuits, or other digital actuators.
The relay outputs provide the normally open
contact of each relay and will be contacted via
terminals. They are implemented using
bistable
relays
.
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.
Furthermore, a delay time can be defined, which must elapse between the switching of two outputs at least.
Thus, the system perturbations resulting from the switching operations can be reduced.
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 14 mA (DC), 40 mA (AC)
Specifications digital outputs:
Relay outputs (NO contact), max. 250 VAC)
Characteristics (Resistive Load):
Initial contact resistance
100m
Ω (at 1A / 6 VDC)
Minimum switching current
100mA (at min. 5 VDC)
Rated load
16 A at 250 VAC
Max. switching voltage
277 VAC
Max. switching capacity
4432 VA (AC)
Endurance
2.5x10
4
ops (Rated Load)
Inductive loads
should be avoided as far as possible, or be suppressed at the source,
respectively.
