ABB UNO-DM-4.0-TL-PLUS User Manual

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000692CG
5 - Installation
Connection of the RS485 line
On the inverter models which equip the UNO-DM-COM KIT board (-X
or -E version only) it is possible to use the RS485 communication port
for: Connecting the inverter to an external supported energy meter (to
manage the energy produced by the PV plant with the Dynamic Feed-in
control functionality); Integrating the inverter with a third party monitoring
and control systems; Carrying out “daisy-chain” (“in-out”) connections of
multiple inverters installation.
The inverter RS458 communication protocol must be properly congured depending on the
device to which it communicates. The RS485 protocol can be changed through the relevant
section of web user interface (see the specic chapter) or through the display and the key-
board (see the specic chapter).
The connection of the serial communication cable must be made to the
specic RS485 connector
26
present on the UNO-DM-COM KIT board.
For connection of the RS485 communication line is necessary a three-
wire shielded cable. The cable specications are described in the fol-
lowing table:
Cable type AWG
Characteristic
impedance
Operating
voltage
Operating
temperature
Shielded 22 - 24 120 Ohm ≥300 V -20...+60 °C
-T/R
+T/R
RTN
-T/R
+T/R
RTN
SHIELD
SHIELD
Shield continuity must be provided along the communication line and must be grounded at a
single point. It is recommended not to exceed a length of 1000m for the communication line.
The cabling of the RS485 line must be winded up to the toroidal provided
in the package (1 winding); this toroidal shall be conveniently placed near
the cable gland which is in the bottom part of the inverter.
1 2 3

ABB UNO-DM-4.0-TL-PLUS Specifications

General

Brand	ABB
Model	UNO-DM-4.0-TL-PLUS
Category	Inverter
Language	English

Summary

Safety and Accident Prevention

Safety Information and Instructions

Key safety instructions for inverter installation and operation. Essential for preventing injury and equipment damage.

Installation and Maintenance Safety

General safety guidelines for installing and maintaining the inverter, including environmental considerations.

Electrical and Thermal Safety

Critical safety instructions regarding electrical hazards and thermal considerations during operation and maintenance.

Characteristics

Characteristics and Technical Data

Power Limitation (Power Derating)

Safety Devices

Installation

Environmental Checks

Installation Position

Wall Mounting

Step-by-step instructions for securely mounting the inverter onto a wall using the provided bracket.

Input Connection to PV Generator (DC Side)

Detailed instructions for connecting the photovoltaic generator's DC output to the inverter's input.

Distribution Grid Output Connection (AC Side)

Procedures for connecting the inverter's AC output to the distribution grid, including cable sizing.

Installation of the External Protective Grounding Cable

Instructions for installing the essential external protective grounding cable for safety.

Instruments

User Interface

Description of Keyboard and LED Panel

Operation

Commissioning (Via Web User Interface)

Step-by-step guide for commissioning the inverter using the web user interface.

Commissioning (Using the Inverter Display)

Procedure for commissioning the inverter directly via its display and buttons.

Power, Alarm, GFI LEDs Behaviour

Web User Interface Menu Structure

SETUP Section

NETWORK Section

Maintenance

Inverter Total De-energization and Safe Access

Essential procedure for safely de-energizing the inverter before performing any work.

Clothing and Protection of Personnel

Safety Equipment and Tools

Routine Maintenance

Troubleshooting

Guidance for identifying and resolving common problems, especially with web interface and wireless communication.

Alarm Messages of the Inverter

A comprehensive list of inverter alarms, their causes, and recommended solutions.

Power Limitation Messages

Attachments

Inverter Network Configuration