Vemer memo AST Series User manual

INTERRUTTORE CREPUSCOLARE
ASTRONOMICO DIGITALE Manuale d’Uso
memo AST NFC
Digital astronomical twilight switch

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User manual memo AST NFC
Index
■Technical features page 3
■Safety warnings page 4
■Dimensions page 4
■Wiring diagrams page 5
■Display and keyboard description page 6
■Initial operation page 7
■Start page (or main) page 8
■Menu description page 11
■Settings menu page 12
Language setting menu page 13
Date setting menu page 14
Time setting menu page 15
Daylight saving time (DST)/winter time (CET)
change setting menu page 16
Astronomical coordinates setting menu page 18
Random switchings setting menu page 20
Protection PIN setting menu page 21
■Program menu page 22
Program menu: new page 27
Program menu: new astro night page 28
Program menu: new astro daily page 32
Program menu: new astro weekly page 33
Program menu: new astro holiday page 34
Program menu: check page 36
Program menu: modify page 38
Program menu: copy page 40
Program menu: delete page 41
■NFC menu page 42
■Hour couter menu page 43
■Reset menu page 44
■Firmware menu page 46
■Error signals page 47
■Battery management page 48
■Reference standards page 48

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User manual memo AST NFC
USER MANUAL
The digital time switches of memo AST are electronic devices for the management of electrical loads between sunset and sunrise times
(astronomical program).
It has a NFC interface that allows it to be coupled with mobile devices (smartphone or tablet and, thanks to the free app that can be downlo-
aded from Google Play store, it is possible to program and make settings directly on your smartphone, and then transfer all the data to the
time switch. The reverse procedure is also possible, i.e. to copy the programming of a time switch on your mobile device.
The backup battery allows you to keep the settings even in case of black-out and can be replaced through the cover on the back of the time
switch.
The time switches of Memo series are devices that perform actions of 1B type, intended to operate in environments with III overvoltage
category and pollution degree 2 in accordance with EN 60730-1 standard.
Code Model Description
VE344800 memo AST1 Astronomical twilight switch 1 channel with NFC interface
VE343000 memo AST2 Astronomical twilight switch 2 channels with NFC interface

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User manual memo AST NFC
TECHNICAL FEATURES
• Power supply: 230 Vac (-15% ÷ +10%) 50/60 Hz
• Power consumption:
- memo AST1: 1W (3.5 VA)
- memo AST2: 1.5W (5.5 VA)
• Lithium backup battery: 3V, CR2032 type (replaceable)
• Output:
- memo AST1: 1 monostable change-over relay with maximum
switchable load of 16 (10)A / 250V
- memo AST2: 2 monostable change-over relays with
maximum switchable load of 16 (10)A /
250V
• Display LCD with backlighting (active with AC power supply)
• NFC communication interface
• Storable programs:
- memo AST1: 120 events
- memo AST2: 120 events (divisible on 2 channels)
• Actions type: 1B
• Operating temperature: -20 ÷ +50°C
• Operating humidity: 20 ÷ 90% non condensing
• Storage temperature: -10 ÷ + 70°C
• Container: 2 DIN modules
• Protection degree: IP20
• Insulation: reinforced between accessible parts (front) and all
the other terminals

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User manual memo AST NFC
SAFETY WARNINGS
nDuring product installation and operation it is necessary
to observe the following instructions:
1) The instrument must be installed by a qualified person,
strictly in observance of the connection diagrams shown
in this manual.
2) After installation inaccessibility to the terminals without
using dedicated tools must be guaranteed.
3) Before accessing the connection terminals, make sure
that the leads are not live.
4) Do not connect or feed the instrument if any part of it is
damaged.
5) The product must be installed and activated in com-
pliance with current electric systems standards.
6) Do not use the product for anything other than the
indicated purpose.
7) In the electrical system upstream of the device must be
installed a protection device against the overcurrents
8) The product can be used in environments with
Measurement Category III and Pollution degree 2,
according to the Standard EN 60730-1
DIMENSIONS
35
87
65

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User manual memo AST NFC
WIRING DIAGRAMS
Memo AST1 Memo AST2

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User manual memo AST NFC
DISPLAY AND KEYBOARD DESCRIPTION
aGeneral indications
bTime indication
cChannel 1/channel 2 status indication
channel status
blocked switchings
active random switchings
active holiday program
active pulse program
active manual program
dDay of the week (DAY) indication
eTurn on the display
Access the menu
ESC (1 level back)
f Key “C1”: decrease datum/previous menu/ switching channel 1/
lock channel 1
Key “C2”: increase datum/next menu/ switching channel 2/
lock channel 2
g Confirm selection
h Hardware reset
Key “Ok” + “C1” (3 sec): random switching channel 1
Key “Ok” + “C2” (3 sec): random switching channel 2
C2
C1

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User manual memo AST NFC
INITIAL OPERATION
• Once out of the package, memo is off: press the key and
wait a moment before activating the display
• The set language is Italian. To change it, press the key for
at least 3 seconds. Choose among: Italian, English, Spanish,
French or German and confirm with
• Make connections following the diagrams on page 5 of this
manual
• Power memo: the backlighting turns on permanently.
• The presence of the backup battery allows the memo to have
updated date and time.
To make the other settings follow the following steps:
Date - format: DD/MM/YY
- 1st day of the week: Monday
Astronomical coordinates - country: Italy
- city: Agrigento
- latitude: North (37° 19’ 12”)
- longitude: East (13° 34’ 12”)
Daylight Saving time (DST)
change: active
- start of daylight saving time (DST):
last Sunday of March at 02:00
o’clock
- end of daylight saving time (DST):
last Sunday of October at 03:00
o’clock
Time correction: - sunrise: +0:00
- sunset: +0:00
Time zone: +1:00 UTC
Random switchings: - minimum: 1 minute
- maximum: 5 minutes
Keyboard lock with PIN: disabled (---)
NFC interface active

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User manual memo AST NFC
START PAGE (or main)
Information messages
- day of the week
- product identification code and serial number
- battery status (only if discharged)
- NO SUPPLy*
•Press the key
to access the menu of memo
C1
and
C2
to change channel 1 and channel 2 status (only for
memo AST2)
to display the calculated sunrise and sunset times**
* Only if memo is not powered by mains.
In this condition the backlighting is not active and the relay is in off
status.
** The displayed times take into account possible entered values of
correction (see page 18).
If the display shows means that the calculated sunrise
time is after the sunset time.
If the display shows means that the calculated sunrise
time is before 00:00 or that the calculated sunset is at 23:59.
NOTE: the NFC interface is
active only when the memo
displays the initial (main) page.
The action range of the NFC
interface is deliberately limited:
in order for the memo and the
smartphone to communicate, it
is necessary to place the latter
on the memo display.
information messages
date
relay 2 status
hour
day of the week
relay 1 status

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User manual memo AST NFC
Access the store of your device, install and start the free app Memo – Vemer.