Specifications

Installation

UMMBRG300-1101 7

• Avoid dusty environments.

• Avoid shock or vibration

• 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 MBRG-300

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:

V+

V-

Pin Signal Function

1 V+ Positive voltage supply (10 - 30 V DC)

2 V- Negative voltage supply, DC power return

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 MBRG-300 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 MBRG-300 is a Modbus Master device on this interface.

Wiring the RS-232 interface

The RS-232 port can alternativly be used for serial communication to a Modbus Slave

device instead of RS-485. The use of the RS-232 interface must be configured using the

web interface (See the section called “Configuring serial line Modbus”). The MBRG-300

is a Modbus Master device on this interface.