Nastec HMA Series User manual

Operating manual
HMA
manHMA_eng_00

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Index
1. Introduction to HMA ......................................................................................................................................................... 3
2. Safety Instructions............................................................................................................................................................. 4
3. Technical Characteristics ................................................................................................................................................... 5
3.1 Weight and dimensions .......................................................................................................................................................... 5
4. Electric wiring.................................................................................................................................................................... 6
4.1 Protections............................................................................................................................................................................... 8
4.2 Electromagnetic compliance.................................................................................................................................................... 8
5. HMA installation............................................................................................................................................................ 9
6. HMA Use and Programming .............................................................................................................................................10
6.1 HMA display .......................................................................................................................................................................... 10
6.2 Initial configuration ............................................................................................................................................................... 10
6.3 Initial view ............................................................................................................................................................................. 11
6.4 Menu view............................................................................................................................................................................. 12
6.5 Control parameters ............................................................................................................................................................... 12
6.6 IN/OUT parameters................................................................................................................................................................ 13
6.7 Connectivity parameters........................................................................................................................................................ 14
7. Protections and alarms.....................................................................................................................................................15

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1. Introduction to HMA
HMA is an electronic device for switching between power sources that integrates multiple functions:
Automatic power source management: HMA, combined with any MultiPower “HMA ready” device, switches
between AC power (mains or generator) and DC power (photovoltaic panels) completely automatically, based on the
programmed logic.
Mechanical disconnection of the two power supplies: Two interlocked contactors guarantee the uniqueness of the
power supply and ensure separation in order to ensure maximum electrical safety.
Control of auxiliary generator: When the AC power is provided by a generator, HMA is able to start or stop it
according to need. HMA also monitors any signs of failure or running out of fuel.
Five programmable switching logics can meet any application requirement.

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2. Safety Instructions
The manufacturer strongly suggests carefully reading this operation manual before using and installing its products
Any operation (installation, maintenance and repair) must be carried out by trained, skilled, and qualified personnel.
Failure to observe and follow the instructions in this manual may result in dangerous and potentially lethal electric shock.
Pay attention to all standard safety and accident prevention regulations
The device must be connected to both power supply (DC: photovoltaic panels
and AC: grid or generator) via a switch to ensure the complete disconnection
from the supply before any operation on the HMA and on the connected load.
Do not remove, for any reason, the cover and the cable plate without having first
disconnected the device from the power supply and having waited at least 5
minutes.
The system must be grounded properly before operation.
Install safety devices on both DC and AC side.
Avoid any shock or significant impact during transport.
Check the product immediately upon delivery and check for damage and/or missing parts. If either occurs, immediately
notify the supplier.
Damages due to transport, incorrect installation, or improper use of the device will null and void the warranty.
Tampering or disassembly of any component will automatically void the warranty.
The manufacturer cannot be held responsible for any damages to people and/or property due to improper use of its
products.
Devices marked with this symbol cannot be disposed of in household waste but
must be disposed of at appropriate waste drop-off centres. It is recommended
to contact the Waste Electrical and Electronic Equipment drop-off centres
(WEEE) in the area. If not disposed of properly, the product can have potential
harmful effects on the environment and on human health due to certain
substances present within. Illegal or incorrect disposal of the product is subject
to serious administrative and/or criminal penalties.

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3. Technical Characteristics
Model
VDC
VAC
I max
Compatibility
HMA 218
90-400
1 x 9 0 - 2 6 5
18 A
4HS MP
SUND
MIDA Solar 203-207 MP
VS 218 MP
HMA 430
190-850
3 x 1 9 0 - 520
30 A
VS 212 MP
VS 409-430 MP
HMA 485
190-850
3 x 1 9 0 - 520
85 A
VS 438-485 MP
Ambient temperature at rated current: da -10 a 50°C
Max altitude at rated current: 1000 m.
Grade of protection: IP54 (NEMA 12)*
Connettivity: MODBUS RTU RS485, Bluetooth® SMART (4.0)
* avoid direct exposition to solar rays.
3.1 Weight and dimensions
Model
Weight *
Size
[Kg]
HMA 218
XX.X
3
HMA 430
XX.X
3
HMA 485
XX.X
3
* Weight without packaging.

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4. Electric wiring
HMA 218
AC input
P.E., T1, T2
DC input
+, -, P.E.
It is necessary to respect the
polarity.
AC/DC output
F1+, F2-, P.E.
It is necessary to respect the
polarity.
HMA 430
AC input
P.E., T1, T2, T3
DC input
+, -, P.E.
It is necessary to respect the
polarity.
AC/DC output
F1+, F2-, F3, P.E.
It is necessary to respect the
polarity.
HMA 485
AC input
P.E., T1, T2, T3
DC input
+, -, P.E.
It is necessary to
respect the polarity.
AC output
F1, F2, F3, P.E.
DC output
+, -, P.E.
It is necessary to
respect the polarity.
It is recommended to use cable lugs.

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Control board
Analog inputs (10 or 15 Vdc):
1. AN1: 4-20 mA
2. AN2: 4-20 mA
3. AN3: 4-20 mA / 0 - 10 Vdc (settable
by jumper C.C.)
4. AN4: 4-20 mA / 0 - 10 Vdc (settable
by C.C.)
Digital outputs:
Power source signal relay:
NO1, COM1: closed contact with AC power supply
NC1, COM1: closed contact with DC power supply
Alarm Relay:
NO2, COM2: contact closed without alarm.
NC2, COM2: contact closed with alarm or without
power supply.
Generator start / stop relay:
NO3, COM3: contact closed for generator start.
NC3, COM3: contact open for generator start.
The digital output relays are non-voltage contacts.
The maximum voltage applicable to the contacts is
250 V AC, max 5 A.
RS485 for COMBO with
device to be controlled:
S1+
S1-
G
It is recommended to
respect the polarity
linking devices.
Digital inputs:
IN1 : float or pressure switch for
pump start and stop
IN2: AC / DC switch
IN3: genset alarm
IN4 : genset lack of fuel
0V
We recommend using only no voltage
contacts.
5V power supply (max 1 A):
• 0V
• + 5V
RS485 for MODBUS:
S2+
S2-
G
It is recommended to
respect the polarity.

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Communication with HMA Ready device
The communication between the HMA and the HMA ready device that is intended to be powered is made via serial port
RS485 COMBO.
It is enough to use a three wire cable with a minimum section of 0.5 mm2 connected to the terminals S1 +, S1-,G.
4.1 Protections
The protections required upstream HMA depend on the type of installation, and local regulations.
Safety protections on both AC and DC side must be used.
For DC side we recommend to use 1000 VDC circuit breaker and, if possible, 1000 VDC surge protection.
For AC side we recommend to use overload protection with the characteristic curve of type C and type B circuit breaker,
sensitive to both AC and DC current.
4.2 Electromagnetic compliance
To ensure electromagnetic compatibility (EMC) of the system, it is necessary to apply the following measures:
Always connect the device to ground
Use shielded signal cables by placing the screen at one end.
Use motor cable as short as possible (<1 m / <3 ft). For longer lengths, it is recommended to use shielded cables
connecting the screen at both ends.
Separate signal, motor, and power supply cables.

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5. HMA installation
HMA can be installed on the wall following the holes shown in the drawing.
The IP54 protection degree (NEMA 12) allows installation even in humid and dusty environments. However, it is
recommended to avoid direct exposure to atmospheric agents and sunlight.

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6. HMA Use and Programming
HMA software is extremely simple to use, but allows a wide variety of parameters to be set for ideal system calibration.
Setting Parameters is protected by password:
1: Installer level (MENU’ CONTROL PARAMETERS, MENU’ IN/OUT PARAMETERS, MENU’ CONNECTIVITY PARAM.)
A password is required for this level; these parameters are adjustable by trained professionals
Default password: 001
From the menu a different password can be set up.
Installer level can be entered only with the correct password; otherwise, it is impossible to set up and/or modify any
parameters (they can be only displayed).
6.1 HMA display
It is a backlit display with 2 rows of 16 characters.
An acoustic signal accompanies the user in use and provides a quick indication in case of an alarm.
6.2 Initial configuration
When HMA is switched on for the first time, the initial setting menu is displayed for the initial setting of parameters to
configure the system. If the initial setting procedure is not completed properly, it is impossible to run the system. Initial
setting procedure can be repeated if necessary.
A brief description of parameters and their allowable ranges are listed below:
Parameter
Default
Description
XXXXX
End user communication language
Language
XXXXX
Switch to DC
/ Menù exit
Switch to AC
/ Menù exit
ENTER
Scroll up
Scroll down
AC + DC to
interrupt power
supply