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 countries
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:
l
Qualification to connect the device according to the VDE
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.
l
Knowledge of safety rules.
l
Knowledge about application and use of the device within the
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) / 75 mA (DC)
Relative duty cycle 100 %
Input
Voltage input 30 V AC/DC
High-signal recognition >8 V AC/DC
Output
Output contacts 2 changeover contacts
Switching voltage max. 250 V AC
Continuous current max. 16 A / relay (80 A / 20 ms)
Total current for
all contacts 25 A
Housing
Dimensions WxHxD 2.0 x 2.8 x 3.0 in. (50 x 70 x 75 mm)
Weight 126 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 wireg
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
inputs & outputs yellow LED
1. Description
The Modbus module with 4 digital inputs and 2 relay outputs is
designed for local switching operations. It is suitable to receive for
example light switches and window contacts in a room and to ope-
rate two light bands or to be used as sunblind control. It can also
be used to control two motor driven fire dampers or for many
other applications. We recommend to protect the relay contacts
additionally by a RC-element or high inductive loads. The relays are
provided with a manual control facility. Depending on the position
of the jumper (below the faceplate) the inputs can be operated as
contact and voltage inputs (A1, 24 V AC/DC; jumper J - A2) or with
actuation to GND (A2; jumper J - A1. Inputs and outputs can be
operated and scanned via a Modbus-Master. Addressing of the
module as well as baud rate and parity setting are done with the
two address switches (x1 / x10) on the front. Possible settings are
addresses 00 to 99 and baud 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 address).
89
92
90
Digital I/O Module
MR-DIO4/2
1108331326
5. Connection Diagram
4. Wiring Diagram
A1 = C1 = 24 V
A1 = C1 = 24 V
BTR NETCOM GmbH
Im Tal 2
78176 Blumberg
Germany
Phone +49 7702 533-0
Fax +49 7702 533-189
Mounting instruction see
www.metz-connect.com
