Rev 20.11.2019
V1.07 - Page 13
Subject to modifications!
romutec Steuer.-und Regelsysteme GmbH Jochsberger Straße 39 D-91592 Buch am Wald
www.romutec.de
Subject to technical changes
5.3 Digital output module with relay outputs 8 DO-R eco
The digital output module
romod 8 DO-R eco
is a
Remote I/O Device which is used to control eight
1-stage motors, or other digital actuators.
The relay outputs provide the normally open
contact of each relay. They will be contacted via
terminals.
The signal that will be switched by the relay
contacts also has to be connected via terminals.
The eight relay outputs are divided into two
groups of four outputs. The two groups are not
linked internally, so both COM-terminals must be
wired.
Important:
The signals to be switched must
have the same phasing.
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 85 mA (DC), 220 mA (AC) with all relay outputs activated
Specifications digital outputs:
Relay outputs (NO contact), max. 250 VAC)
Characteristics (Resistive Load):
Initial contact resistance
100m
Ω (at 1A / 24 VDC)
Rated load
3 A at 250 VAC / 30 VDC
Max. switching voltage
277 VAC, 30 VDC
Max. switching capacity
830 VA (AC), 90 W (DC)
Endurance
1x10
5
ops (Rated Load)
Inductive loads
should be avoided as far as possible, or be suppressed at the source,
respectively.
