Data sheet
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MR-DO4 Modbus module with digital outputs
Part number 1108361321 2016-07-18
Illustrations Principle diagram
A2/ GND
24 V
BUS A-
Open Energy Management Equipment 34TZ
Modbus RTU on RS-485
BUS B+
RISC - CPU
A1/ +24V
Wiring 12 N.C. 14 N.O. 11 C 22 N.C. 24 N.O. 21 C 32 N.C. 34 N.O. 31 C
42 41 44 32 31 34 A1 24 V AC/DC A1 GND A2 BUS B+ B+ B+ AABUS AA2
42 N.C. 44 N.O. 41 C
11 14 12 21 24 22 Use copper conductors only
Product description The outputs can be switched by means of standard registers via a Modbus master. Module address, bit rate and parity are set by means of two address switches on the front or by software.
With strong inductive loads, we recommend protecting the relay contacts additionally with an RC element. The module is provided with a manual control for manually switching the relays.
Suitable for decentralized mounting on DIN TH35 rail according to IEC 60715 in electrical distribution cabinets.
© 2016 METZ CONNECT - Subject to modifications!
The Modbus module with 4 digital outputs was developed for decentralized switching tasks. It is suitable for switching electrical components, such as motors, contactors, lamps, louvers, etc.
METZ CONNECT GmbH Im Tal 2 | 78176 Blumberg | Germany Ph. +49 7702 533-0 | Fax +49 7702 533-433 Additional documentation see www.metz-connect.com
Data sheet MR-DO4 Modbus module with digital outputs
Page 2/4 Part number 1108361321 2016-07-18
Technical data Approvals C-UL Certification
Open Energy Management Equipment 34TZ
Modbus interface Protocol Address range Transmission rate Bus interface
Modbus RTU 00 to 99 1200 to 115200 bit/s, factory setting 19200 bit/s Even RS485 two wire bus with potential equalization in bus or line topology terminate with 120 Ohm
Supply Operating voltage Current consumption Relative duty cycle
24 V AC/DC ± 10 % (SELV) 200 mA (AC) / 70 mA (DC) 100 %
Outputs Digital outputs Switching voltage max. Continuous current max. Total current for all contacts Switching frequency
4x changeover contacts (4 DPST) 250 V AC 5 A per relay 12 A 360 switching cycles per hour
General informations 230/400 V AC III 2 4 kV basic insulation
II 2 2.5 kV reinforced insulation
© 2016 METZ CONNECT - Subject to modifications!
Rated insulation voltage Overvoltage category Pollution degree Rated surge voltage Type of insulation
METZ CONNECT GmbH Im Tal 2 | 78176 Blumberg | Germany Ph. +49 7702 533-0 | Fax +49 7702 533-433 Additional documentation see www.metz-connect.com
Data sheet MR-DO4 Modbus module with digital outputs
Page 3/4 Part number 1108361321 2016-07-18
Technical data Housing Dimensions WxHxD Depth including switches Weight Mounting position Mounting Side-by-side mounting Material Housing Terminal blocks Cover plate Type of protection (IEC 60529) Housing Terminal blocks
1.378 x 2.728 x 2.362 in. (35 x 69.3 x 60 mm) 2.717 in. (69 mm) 95 g any on TH35 rail per IEC 60715 Without space The maximum quantity of Modbus modules connected side-by-side 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 necessary polyamide 6.6 V0 polyamide 6.6 V0 polycarbonate IP40 IP20
Terminal blocks Supply and bus Terminal block Solid wire Stranded wire Wire diameter Module connection, digital outputs Solid wire Stranded wire Wire diameter Protective circuitry
4-pole max. AWG 16 (1.5 mm²) max. AWG 18 (1.0 mm²) 0.3 mm to max. 1.4 mm max. AWG 12 (4 mm²) max. AWG 14 (2.5 mm²) 0.3 mm to max. 2.7 mm Polarity reversal protection of operating voltage Polarity reversal protection of supply and bus
Operation Storage
23 °F to 131 °F (-5 °C to +55 °C) -4 °F to +158 °F (-20 °C to +70 °C)
Display Operating and bus activity Error indication Status of the outputs
green LED red LED yellow LEDs
Additional documents Software description, mounting note, certificates
All additional documents are available for download at www.metz-connect.com
METZ CONNECT GmbH Im Tal 2 | 78176 Blumberg | Germany Ph. +49 7702 533-0 | Fax +49 7702 533-433 Additional documentation see www.metz-connect.com
© 2016 METZ CONNECT - Subject to modifications!
Temperature range
Data sheet MR-DO4 Modbus module with digital outputs
Page 4/4 Part number 1108361321 2016-07-18
MARCOM shop.marcomweb.it
METZ CONNECT GmbH Im Tal 2 | 78176 Blumberg | Germany Ph. +49 7702 533-0 | Fax +49 7702 533-433 Additional documentation see www.metz-connect.com
© 2016 METZ CONNECT - Subject to modifications!
Dimensional drawing