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Digital Output Module
MR-DO4
1108361321
with manual control facility
MR-DOA4
110836132101
without manual control facility
1. Description
The Modbus modules with 4 digital outputs are designed for
local switching operations. They are suitable to operate electrical
components such as motors, contactors, lamps, sun-blinds etc.
We recommend to protect the relay contacts additionally by a
RC-element for high inductive loads. MR-DO4 is equipped with a
manual control facility for manual switching of the relays.
MR-DOA4 has no manual control facility.
The outputs can be operated via a Modbus-Master. Setting of the
slave address, bit rate and parity is done with the two address
switches (x1 / x10) on the front. Possible settings are addresses 00
to 99 and bit rates 1200, 2400, 4800, 9600, 19200, 38400, 57600
und 115200 Bd.
The device does not participate in bus communication if the
address is 00 (reserved for broadcast commands).
METZ CONNECT | Im Tal 2 | 78176 Blumberg | Germany | Phone +49 7702 533-0 | Fax +49 7702 533-433
Distributed by RIA CONNECT GmbH and BTR NETCOM GmbH
Mounting instruction see www.metz-connect.com
Continuation Description
Communication with the master can be monitored with a watch-
dog timer. If master or communication fail the outputs are swit-
ched to their basic state (secure state) and the red LED is lighting.
The timer restarts with each valid message addressed to the device.
When defining the time constant it is necessary to take account of
the baud rate, the number of slaves on the bus and the length of
the messages per slave.
2. Declaration of Conformity
The device was tested according to the applicable standards.
Conformity was proofed. The declaration of conformity is available
at the manufacturer BTR NETCOM GmbH.
Notes Regarding Device Description
These instructions include indications for use and mounting of the
device. In case of questions that cannot be answered with these
instructions please consult supplier or manufacturer.
The indicated installation directions or rules are applicable to the
Federal Republic of Germany. If the device is used in other coun-
tries it applies to the equipment installer or the user to meet the
national directions.
Safety Instructions
Keep the applicable directions for industrial safety and prevention
of accidents as well as the VDE rules.
Technicians and/or installers are informed that they have to
electrically discharge themselves as prescribed before installation
or maintenance of the devices.
Only qualified personnel shall do mounting and installation work
with the devices, see section "qualified personnel".
The information of these instructions have to be read and under-
stood by every person using this device.
Symbols
Warning of dangerous electrical voltage
Danger
means that non-observance may cause risk of life,
grievous bodily harm or heavy material damage.
Qualified Personnel
Qualified personnel in the sense of these instructions are persons
who are well versed in the use and installation of such devices
and whose professional qualification meets the requirements of
their work.
This includes for example:
Qualification to connect the device according to the VDE
l
specifications and the local regulations and a qualification to
put this device into operation, to power it down or to activate it
by respecting the internal directions.
Knowledge of safety rules.
l
Knowledge about application and use of the device within the
l
equipment system etc.
3. Technical Data
Modbus Interface
Protocoll
Modbus RTU
Transmission rate
1200 ... 115200 Bd
(factory setting 19200 Bd Even)
Cabling
RS485 two wire bus with voltage
equalizing cable in bus / line topology
Supply
Operating voltage range
20 ... 28 V AC/DC (SELV)
Current consumption
200 mA (AC) / 70 mA (DC)
Relative duty cycle
100 %
Output
Output contacts
4 x changeover contacts
Switching voltage max.
250 V AC
Continuous current max.
5 A per relay
Total current for
all contacts
12 A
Switching frequency
360 switching cycles per hour
Housing
Dimensions WxHxD
1.4 x 2.8 x 2.6 in. (35 x 70 x 65 mm)
Weight
95 g
Mounting position
any
Mounting
standard rail TH35 per IEC 60715
Mounting in series
the maximum quantity of modules
without space
connected in line is limited to 15 or to
a maximum power consumption of
2 Amps (AC or DC) per connection to
the power supply. For any similar block
of additional modules a separate
connection to the power supply is
mandatory.
Material
Housing
Polyamide 6.6 V0
Terminal blocks
Polyamide 6.6 V0
Cover plate
Polycarbonate
Type of protection
(IEC 60529)
Housing
IP40
Terminal blocks
IP20
Terminal blocks
Supply and bus
4 pole terminal block
max. AWG 16 (1,5 mm²) solid wire
max. AWG 18 (1,0 mm²) stranded wire
Wire diameter
min. 0.3 mm up to max. 1.4 mm
(terminal block and jumper plug are
included to each packing unit)
Module connection
Input/Output
max. AWG 12 (4.0 mm²) solid wire
max. AWG 14 (2.5 mm²) stranded wire
Wire diameter
min. 0.3 mm up to max 2.7 mm
Temperature range
Operation
-5 °C ... +55 °C
Storage
-20 °C ... +70 °C
Protective circuitry
polarity reversal protection of
operating voltage
polarity reversal protection of supply
and bus
Display
Operating and bus activity green LED
Error indication
red LED
Status of the outputs
yellow LED
4. Wiring Diagram
5. Connection Diagram
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