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.

11
SOFTWARE
MONITORING SOFTWARE
PowerShield3software ensures an effective and user-friendly monitoring of the ATS, displaying important items of information
such as the input voltage, load applied and phase displacement angle between inputs.
It can also automatically perform shutdown operations, send e-mails, sms and network messages when specific user-selected
events occur.
Installation operations:
Connect the RS232 communication port of the ATS to a COM communication port of a PC via the serial cable
provided*, or connect the USB port of the ATS to a USB port of the PC using a standard USB cable *.
Download the software from www.riello-ups.com, selecting the desired operating system.
Follow the installation program instructions.
For more detailed information about PowerShield3, refer to the software manual which can be downloaded from our
website www.riello-ups.com.
* We recommend the use of a cable no longer than 3 metres.

12
USE
DISPLAY INDICATION
The LED display shows the general functioning status of the ATS. The table below lists and describes the signal displayed.
Fig. 11: Focus on LED display.
FIGURE 11 LEGEND:
Indication
type
LED description
LED status
Condition
Sound
Preference
indication
SELECTED A
ON
Power A is preference
OFF
SELECTED B
OFF
SELECTED A
OFF
Power B is preference
OFF
SELECTED B
ON
Input power
status
A OK
OFF
Inlet A has no power input
OFF
ON
Inlet A has power input, and power is OK
OFF
BLINKING
Inlet A has power input, but power is out of SPEC
OFF
B OK
OFF
Inlet B has no power input
OFF
ON
Inlet B has power, and power is OK
OFF
BLINKING
Inlet B has power input, but power is out of SPEC
OFF
Output
status
OUTPUT FROM A
ON
Power A is output
OFF
OUTPUT FROM B
OFF
OUTPUT FROM A
OFF
Power B is output
OFF
OUTPUT FROM B
ON
OUTPUT FROM A
OFF
No output
OFF
OUTPUT FROM B
OFF
Alarm
FAULT
OFF
Alarm not present
OFF
ON
Alarm present
Continuous

13
TROUBLESHOOTING GUIDE
Irregular operation of the ATS is not always an indication of a fault, and can often be resolved quickly and simply. Please
consult the table below, which may help you deal with some commons issues.
PROBLEM
POSSIBLE CAUSE
SOLUTION
THE ATS WITH THE
MAINS VOLTAGE
PRESENT, DOES NOT
TURN ON
(THE LEDs DOES NOT
BLINK AND NO BEEP IS
EMITTED)
NO CONNECTION WITH
INPUT PLUGs
Connect the mains to the input plugs as indicated in the
installation paragraph
INPUT SWITCHES IN “OFF”
POSITION
Turn the input switches in “ON” position
MAINS VOLTAGE NOT
PRESENT (BLACKOUT)
Check that the mains voltage is present or check if the
UPS supplying the ATS is powered on.
PROTECTIVE DEVICE
UPSTREAM ACTIVATED
Reset the protective device. Warning: check that there
is no overload or short-circuit at the output of the UPS.
THE LOAD IS NOT
POWERED
NO CONNECTION WITH
OUTPUT SOCKETS
Connect the load to the output sockets
INTERVENTION OF 10A
THERMAL PROTECTION
The hermal protection device will operate in the event
of a short circuit or overload on one of the 10A output
sockets. The thermal protection can be reset by
pushing the button in which will result in the power
being reconnected to the load. Therefore prior to
attempting a reset of the thermal protection, please
check the connected loads rating and/or determine if
there are any problems. Then once reset reconnect
each load one at a time to ensure no problems exists.
THE DISPLAY SHOWS
NOTHING OR PROVIDES
INCORRECT
INFORMATION
THE DISPLAY HAS POWER
SUPPLY PROBLEMS
Shut down the ATS completely and wait for a few
seconds.
Switch the ATS on again, if the problem persists,
contact the nearest technical support centre.
THE DISPLAY IS OFF
BUT THE LOAD IS
POWERED
THE DISPLAY HAS POWER
SUPPLY PROBLEMS
Contact the nearest technical support centre.

14
TECHNICAL DATA
Model
ATS
Nominal Voltage
220/230/240 Vac
Nominal Frequency
50 or 60Hz
Maximum Current
16A
Switching time
8-12ms typical, 16ms maximum
Display
7 LEDs display
Buzzer
Acoustic signal for overload, overtemperature, short-circuit or others internal faults.
Protections
Overload, overtemperature, short-circuit
Dimensions (W x D x H)
483 (19”) x 330 x 44 (1U) mm
Weight
5 Kg
Ambient Temperature(6)
0 –40 °C
umidity
0–95% non-condensing
Noise
< 25 dB
INPUT VOLTAGE AND FREQUENCY THRESHOLDS (DEFAULT SETTINGS)
FUNCTION
DESCRIPTION
DEFAULT SETTING
Low voltage INPUT A
not good
Lower voltage value of INPUT A to switch on INPUT B
180V
Low voltage INPUT A
good
Lower voltage value of INPUT A to return on INPUT A (with
A setted as preferred and output supplied by INPUT B)
190V
High voltage INPUT
A not good
Higher voltage value of INPUT A to switch on INPUT B
258V
High voltage INPUT
A good
Higher voltage value of INPUT A to return on INPUT A (with
A setted as preferred and output supplied by INPUT B)
248V
Low voltage INPUT B
not good
Lower voltage value of INPUT B to switch on INPUT A
180V
Low voltage INPUT B
good
Lower voltage value of INPUT B to return on INPUT B (with
B setted as preferred and output supplied by INPUT A)
190V
High voltage INPUT
B not good
Higher voltage value of INPUT B to switch on INPUT A
258V
High voltage INPUT
B good
Higher voltage value of INPUT B to return on INPUT B (with
B setted as preferred and output supplied by INPUT A)
248V
Low frequency
INPUT A
Lower frequency value for INPUT A to switch on INPUT B
45Hz
High frequency
INPUT A
Higher frequency value for INPUT A to switch on INPUT B
55Hz
Low frequency
INPUT B
Lower frequency value for INPUT B to switch on INPUT A
45Hz
High frequency
INPUT B
Higher frequency value for INPUT B to switch on INPUT A
55Hz

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