Riello MTA 16A User manual

Multi Switch ATS
MTA 16A
USER MANUAL

INTRODUCTION
Thank you for choosing our product.
Riello UPS specialises in designing, developing and manufacturing uninterruptible power supplies (UPS) and accessories.
The Automatic Transfer Switch (ATS) described in this manual is a high quality product which has been carefully designed and
built in order to guarantee the highest levels of performance.
This manual contains detailed instructions for using and installing the product.
We recommend that this manual is referred to before attempting any operations on the ATS.
NOTE: Some images contained within this document are for indication purposes only, and therefore may not identically match
the products in use.
ENVIRONMENTAL PROTECTION
During the development of its products, Riello UPS dedicates extensive resources to managing environmental concerns.
All our products meet the objectives defined in the environmental management system developed by the company in
compliance with standards in force.
No hazardous materials such as CFC, HCFC or asbestos are used in this product.
When evaluating packaging used, Riello UPS favours recyclable materials, which are listed in the table below.
Please dispose of these materials in compliance with your local standards.
DESCRIPTION
MATERIAL
Packaging corners
Polystyrene
Box
Cardboard
Protective bag
HD Polyethylene
DISPOSING OF THE PRODUCT
The ATS contains internal components that (when disposed of) are considered Toxic or Hazardous Waste e.g electronic circuit
boards. Please refer to qualified personal regarding the safe disposal of these items.

SECURITY
WARNING: The ATS must be connected to earth when in use.
In line with current regulations, only use the cables that have been supplied with the machine. The power supply socket must be
easily accessible to the operator.
ATTENTION! A soft damp cloth may be used to clean the outside of the machine (always with the system disconnected from
the mains power supply and users).
Do not use any type of solvent as this may damage the external finishing of the machine.
ATTENTION! The ATS has been designed exclusively for professional use.
NOTE: These instructions may be modified by the wiring regulations in force in the country where the ATS is purchased.
Operation
The ATS has been designed exclusively to operate indoors. It is advisable to install it in areas where no inflammable liquids or
gases, or other harmful or noxious substances, have been stored.
© The reproduction of any part of this manual, in whole or in part, is forbidden without the prior consent of the manufacturer.
In order to make improvements, the manufacturer reserves the right to modify the product described at any moment and without notice.

CONTENTS
OVERVIEW 5
RECEIVING THE MATERIAL 5
STORING 5
FUNCTION 5
CHARACTERISTICS 5
ATS VIEWS 6
CONTROL PANEL 7
INSTALLATION 8
INSTALLATION 8
CONNECTIONS 8
CONFIGURING THE ATS 8
COMMUNICATION PORTS 9
RS232 AND USB CONNECTORS 9
COMMUNICATION SLOTS 9
CONTACTS PORT 10
SOFTWARE 11
MONITORING SOFTWARE 11
USE 12
DISPLAY INDICATION 12
TROUBLESHOOTING GUIDE 13
TECHNICAL DATA 14
INPUT VOLTAGE AND FREQUENCY THRESHOLDS (DEFAULT SETTINGS) 14

5
OVERVIEW
RECEIVING THE MATERIAL
After opening the package, please check its contents. The ATS package contains the following material:
No. 1 ATS module
No. 1 user manual (this document)
No. 2 fixing brakets with relatives screws for rack cabinet mounting
No. 1 USB cable
No. 2 output IEC-IEC 10A cables
No. 1 output IEC-IEC 16A cable
No. 2 input IEC-SCHUCKO 16A cables
No. 1 warranty card
STORING
If this ATS module is to be stored prior to installation, it should remain in the original packing, in a dry place (storage
temperature range: from -40°C to +70°C).
FUNCTION
The ATS source transfer switch is a simple and effective solution to manage the redundancy provided by two independent
power sources, ensuring the uninterrupted operation of mission-critical equipment.
The ATS allows the automatic or manual transfer of your loads between two independent power sources without interrupting the
supply of power. Either of the two sources may be designated as the preferred power source, with the other becoming the
alternate source. In the event of a failure, the transfer from one source to the other is automatic and instantaneous.
Automatic transfer to the alternative source takes place if the voltage of the preferred source goes outside a tolerance above or
below of the nominal value. Return to the preferred source is automatic when the voltage returns within the tolerance range.
To provide a maximum level of protection for the connected equipment, both power sources should be on-line type UPSs.
However, the ATS module can also be supplied by one UPS and another type of source, or by two non-UPS sources providing
a sinusoidal output (AC system, engine generator set, etc.).
CHARACTERISTICS
The ATS has the following characteristics:
Input current up to 16A
Output 10A thermal protections for OUTPUT 1 and 2 (10A outputs)
7 LEDs display
Thresholds for to transfer from preferred to alternate source settable by user.
RS232, USB communication ports and contacts port.
Maximum operating temperature 40°C
Dimensions: 1U x 19” x 330mm
Weight: 5 Kg

6
ATS VIEWS
Figure 6 shows in detail the front and rear views of the ATS.
Fig. 6: front and rear views of ATS module.
FIGURE 6 LEGEND:
“INPUT A” switch
SNMP expansion slot
“INPUT B” switch
Brakets for rack cabinet mounting
Output 10A thermal breaker “OUTPUT 1”
Contacts port (see the relative paragraph for its
functioning)
Output 10A thermal breaker “OUTPUT 2”
Output IEC 10A sockets “OUTPUT 1”
USB communication port
Output IEC 10A sockets “OUTPUT 2”
RS232 communication port
Output IEC 16A socket “OUTPUT 3”
LED indication panel (see related paragraph)
Input 16A plug “INPUT A”
Preferred source selection button
Input 16A plug “INPUT B”
Acoustic signal mute button

7
CONTROL PANEL
The LED display on the front of the ATS shows the general functioning status of the ATS.
Fig. 7: Focus of LED display.
FIGURA 7 LEGEND:
Preferred input indication
Input “OK” indication
Output supplied indication
Alarm indication
Preferred source selection button
Acoustic signal mute button

8
INSTALLATION
INSTALLATION
Figure 8 shows how to install the ATS module in a 19-inch bay (with a depth of 600mm), using the four screws supplied, at the
desired height in the cabinet uprights.
The module is not as wide as the bay and therefore does not obstruct the flow of air.
Fig. 8: ATS module in a rack cabinet mounting.
If the temperature inside the bay will rise above 40 °C, ventilation is required.
CONNECTIONS
For connecting the ATS, plug “INPUT A” and “INPUT B” to the mains or to the UPS depending using the SCHUCKO-IEC or
IEC-IEC 16A cables supplied.
Plug the user load to the output 10A (“OUTPUT 1 and 2”) or 16A (“OUTPUT 3”) sockets depending on user’s requirements.
Put the input switch in “ON” position. The output will then be supplied by the source set as preferred (Default: “INPUT A”).
CONFIGURING THE ATS
It is possibile to set the input preferred to supply the output by pushing the button “select input”.
The following table shows the configurations available.
FUNCTION
DESCRIPTION
DEFAULT
POSSIBLE CONFIGURATIONS
Preferred input
Selection of input that normally
supplies the load
INPUT A
INPUT A
INPUT B

9
COMMUNICATION PORTS
The ATS is supplied with the following communication ports:
Serial port is available with RS232 connector and USB connector on the front panel.
NOTE: the use of one port automatically excludes the other.
Expansion slots for additional COMMUNICATION SLOT interface boards
Contacts port on the rear panel.
RS232 AND USB CONNECTORS
RS232 CONNECTOR
USB CONNECTOR
PIN #
NAME
TYPE
SIGNAL
PIN #
SIGNAL
1
1
VBUS
2
TX
OUT
Serial line TX
2
D-
3
RX
IN
Serial line RX
3
D+
4
4
GND
5
GND
POWER
6
+12V
POWER
7
8
9
NOTE: the utilization of the communication port is optional and it is not necessary for the correct functioning of the ATS.
The RS232 and USB communication ports allows remote monitoring of the ATS via software; available for free download at
www.riello-ups.com.
At the rear of the ATS a contact port is available that allows remote monitoring via internal relays (see related paragraph).
COMMUNICATION SLOTS
The ATS is equipped with an expansion slot for accessory communication boards, enabling the equipment to communicate
using the main communication standards.
Some examples:
Second RS232 port
Serial duplicator
Ethernet agent with TCP/IP, HTTP and SNMP protocol
JBUS / MODBUS protocol converter
To insert the board, unscrew the slot cover and carefully insert into the slot.
For further information on the accessories available, visit the web site.

10
CONTACTS PORT
The contacts port is formed using eight (8) pins numbered from left to right (see fig. 9), which can be connected to an external
monitoring system (such as a BMS) in order to monitor the operational status of the ATS.
The external equipment must respects the voltage and current characteristics of contacts port.
Fig. 9: Focus on contacts port.
The contacts port provides the following pins:
Pin 1: supplies +12V d.c. and a maximum 100mA current usable as user needs.
Pin 2: GND.
Pin 3: common contact.
Pin 4: “INPUT B” active contact (if the contact between “pin 4” and “pin 3” is closed, output is supplied by “INPUT B”).
Pin 5: “INPUT A” active contact (if the contact between “pin 5” and “pin 3” is closed, output is supplied by “INPUT A”).
Pin 6: “INPUT A”OK contact (if the contact between “pin 6” and “pin 3” is closed, “INPUT A” is present and regular).
Pin 7: “INPUT B” OK contact (if the contact between “pin 7” and “pin 3” is closed, “INPUT B” is present and regular).
Pin 8: Status OK contact (if the contact between “pin 8” and “pin 3” is closed, ATS functioning status is regular).
The following diagram shows the fuctioning of the contacts port.
Fig. 10: Contacts port basic diagram.
ATTENTION: the pins of the contact port are able to carry a 1A maximum current and 48V maximum voltage.