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• Do not exceed the specified operational temperatures and humidity range.
• Mount inside an electrical switchboard or control cabinet.
• Make sure there is sufficient air ventilation and clearance to other devices mounted
next to the unit.
• Observe applicable local regulations like EN60204 / VDE0113.
Powering the MBDC-200
Before connecting power please follow the rules in the section called "Safety Precau-
tions" and the section called "Before connecting anything".
Power is supplied via a 3.81 mm 2-pin pluggable terminal block located at the top side
of the mounted unit (refer to Figure 2.1, "Location of connectors" ). The following table
and picture shows the power terminal socket pinout:
Pin
Signal
1
V+
2
V-
Table 3.1: Power supply connector pinout
Make sure that the polarity of the supply voltage is correct before connecting any
device to the serial ports! A wrong polarity can cause high currents on the ground
plane between the V- power supply pin and the serial port ground pins, which can
cause damage to the device.
Wiring the RS-485/422 interface
The RS-485/422 port is used for integrating the MBDC-200 into a two-wire or four-wire
Modbus over Serial Line network. The use of either the RS-485 or RS-422 interface must
be configured using the web interface (See the section called "Configuring serial line
Modbus"). The MBDC-200 is a Modbus Master device on this interface.
The RS-485 and RS-422 signals are located at the 3.81 mm 6-pin pluggable terminal
block on the top side of the mounted unit (refer to Figure 2.1, "Location of connectors" ).
The following table and picture shows the pinout:
Pin
3
PORT1 PORT2
4
RS-485
5
6
RS-422
7
8
Table 3.2: RS-485/RS-422 connector pinout
UMMBDC200-2201
Function
Positive voltage supply (10 - 30 V DC)
Negative voltage supply, DC power return
RS-485 signal
RS-422 signal
GND
GND
D+ port 1
TX+
D- port 1
TX-
GND
GND
D+ port 2
RX+
D- port 2
RX-
Description
Modbus Common
Modbus D1 or TXD1
Modbus D0 or TXD0
Modbus Common
Modbus D1 or RXD1
Modbus D0 or RXD0
Installation
7
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