Meinberg LANTIME M300 Use and care manual

TECHNICAL REFERENCE
LANTIME
M300/GNS/LNE/AD10-AD10
October 27, 2022
Meinberg Funkuhren GmbH & Co. KG

Table of Contents
1 Imprint 1
2 Important Safety Information 2
2.1 Important Safety Information and Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.2 UsedSymbols................................................. 3
2.3 ProductDocumentation ........................................... 4
2.4 SafetyduringInstallation.......................................... 5
2.5 Connection of Protective Earth Conductor/Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.6 SafetyDuringOperation .......................................... 9
2.7 SafetyduringMaintenance......................................... 10
2.8 HandlingofBatteries ............................................ 11
2.9 CleaningandCare .............................................. 12
2.10PreventionofESDDamage......................................... 12
2.11 Return of Electrical and Electronic Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3 General Information about LANTIME 14
4 LANTIME Chassis: Technical Specifications 15
5 LANTIME M300 Front Connectors 17
6 LANTIME M300 Rear Connectors 19
6.1 AC/DCPowerSupply ............................................ 19
6.2 COMxTimeString:RS-232 ........................................ 22
6.3 ErrorRelay .................................................. 23
6.4 Antenna Input: GNSS Reference Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.5 PulseperSecondOutput .......................................... 25
6.6 10MHzFrequencyOutput ......................................... 25
6.7 10/100BASE-TNetworkPort........................................ 25
7 GNSS Antenna Installation 26
7.1 Installation of the Multi-GNSS Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.2 Assembly of the RV-76G GPS/GLONASS Antenna for Mobile Applications . . . . . . . . . . . . 32
8 Information on Satellite Reception 33
8.1 MultiGNSSSatelliteReceiver ...................................... 33
8.2 HowSatelliteNavigationWorks...................................... 33
8.2.1 Time Zones and Daylight Saving Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9 RoHS and WEEE 35
10 Declaration of Conformity 36
Date: October 27, 2022 LANTIME

1 Imprint
1 Imprint
Meinberg Funkuhren GmbH & Co. KG
Lange Wand 9, 31812 Bad Pyrmont, Germany
Phone: + 49 (0) 52 81 / 93 09 - 0
Fax: + 49 (0) 52 81 / 93 09 - 230
Website: https://www.meinbergglobal.com
Email: [email protected]
Date: June 17, 2021
LANTIME Date: October 27, 2022 1

2 Important Safety Information
2.1 Important Safety Information and Safety Precautions
The following safety information must be observed whenever the device is being installed or operated. Failure
to observe this safety information and other special warnings or operating instructions in the product manuals
constitutes improper usage and may violate safety standards and the manufacturer’s requirements.
Depending on the configuration of your device or installed options, some information may
not specifically apply to your device.
The device satisfies the requirements of the following EU regulations: EMC Directive,
Low Voltage Directive, RoHS Directive and—where applicable—the Radio Equipment Directive.
If a procedure is marked with the following signal words, you may only proceed with it if you have understood
and fulfilled all requirements. Hazard notices and other relevant information are classified and indicated as
such in this manual according to the following system:
DANGER!
This signal word indicates a hazard with a high risk level . Such a notice refers to a procedure
or other action that will very likely result in serious injury or even death if not observed or
if improperly performed.
WARNING!
This signal indicates a hazard with a medium risk level . Such a notice refers to a procedure or
other action that may result in serious injury or even death if not observed or if improperly
performed.
CAUTION!
This signal word indicates a hazard with a low risk level . Such a notice refers to a procedure or
other action that may result in minor injury if not observed or if improperly performed.
ATTENTION!
This signal word refers to a procedure or other action that may result in product damage or the
loss of important data if not observed or if improperly performed.
2 Date: October 27, 2022 LANTIME

2 Important Safety Information
2.2 Used Symbols
The following symbols and pictograms are used in this manual. Pictograms are used in particular to indicate
potential hazards in all hazard categories.
Symbol
Beschreibung / Description
IEC 60417-5031
Gleichstrom / Direct current
IEC 60417-5032
Wechselstrom / Alternating current
IEC 60417-5017
Erdungsanschluss / Earth (ground) terminal
IEC 60417-5019
Schutzleiteranschluss / Protective earth (ground) terminal
ISO 7000-0434A
Vorsicht / Caution
IEC 60417-6042
Vorsicht, Risiko eines elektrischen Schlages / Caution, risk of electric shock
IEC 60417-5041
Vorsicht, heiße Oberfläche / Caution, hot surface
IEC 60417-6056
Vorsicht, Gefährlich sich bewegende Teile / Caution, moving parts
IEC 60417-6172
Trennen Sie alle Netzstecker / Disconnect all power connectors
IEC 60417-5134
Elektrostatisch gefährdete Bauteile / Electrostatic Discharge Sensitive Devices
IEC 60417-6222
Information generell / General information
2012/19/EU
Dieses Produkt fällt unter die B2B Kategorie. Zur Entsorgung muss es an den
Hersteller übergeben werden.
This product is handled as a B2B-category product. To ensure that the product is
disposed of in a WEEE-compliant fashion, it must be returned to the manufacturer.
LANTIME Date: October 27, 2022 3

2.3 Product Documentation
Detailed product documentation is provided on a USB flash drive delivered with the Meinberg system. The
manuals can also be downloaded from the Meinberg website at https://www.meinbergglobal.com, where you can
enter your system name into the search box at the top of the page to find the relevant manual. Alternatively,
contact Meinberg Support for further assistance.
The "Docs & Support" menu on the Web Interface also provides user manuals for time server administrators.
This manual contains important safety instructions for the installation and operation of the
device. Please read this manual thoroughly before using the device.
This device may only be used for the purpose described in this manual. In particular, the
specified operating limits of the device must be heeded. The person setting up the device is
responsible for safety matters in relation to any larger system in which the device is
installed!
Failure to observe these instructions may have an adverse impact on device safety!
Please keep this manual in a safe place.
Target Readership
This manual is only intended to be used by qualified electricians, or by persons who have been appropri-
ately instructed by a qualified electrician and who are familiar with applicable national standards and with
safety rules & regulations. This device may only be installed, set up, and operated by qualified personnel.
4 Date: October 27, 2022 LANTIME

2 Important Safety Information
2.4 Safety during Installation
WARNING!
Pre-Operation Procedures and Preparation for Use
This mountable device has been designed and examined in accordance with the requirements
of the standard IEC 62368-1 "Audio/Video, Information and Communication Technology
Equipment - Part 1: Safety Requirements".
When the mountable device is to be used as part of a larger unit (e.g., electrical enclosure),
there will be additional requirements in the IEC 62368-1 standard that must be observed and
complied with. General requirements regarding the safety of electrical equipment (such as IEC,
VDE, DIN, ANSI) and applicable national standards must be observed in particular.
The device has been developed for use in the industrial sector or in home environments and may
only be used in such environments. In environments at risk of high environmental conductivity
("high pollution degree" according to IEC 60664-1), additional measures such as installation
of the device in an air-conditioned electrical cabinet may be necessary.
Transport, Unpacking, Installation
If the unit has been brought into the usage area from a cold environment, condensation may
develop; in this case, wait until the unit has adjusted to the temperature and is completely dry
before setting it up.
When unpacking & setting up, and before operating the equipment, be sure to read the information
on installing the hardware and the specifications of the device. These include, for example,
dimensions, electrical characteristics, or necessary environmental conditions.
Fire safety standards must be upheld with the device in its installed state.
The device must not be damaged in any way when mounting it. In particular, holes must not be
drilled into the housing.
For safety reasons, the device with the highest mass should be installed at the lowest position in
the rack. Further devices should be installed from the bottom, working your way up.
The device must be protected against mechanical & physical stresses such as vibration or shock.
LANTIME Date: October 27, 2022 5

Connecting Data Cables
Do not connect or disconnect data cables during a thunderstorm, as doing so presents a risk in
the event of a lightning strike.
The device cables must be connected or disconnected in the order specified in the user
documentation for the device. Cables should always be held by the connector body when
connecting or disconnecting them. Never pull a connector out by pulling on the cable. Doing so
may cause the plug to be detached from the cable or cause damage to the plug itself.
Cables must be installed so that they do not represent a health & safety hazard (e.g., tripping)
and are not at risk of damage (e.g., kinks).
Connecting the Power Supply
This equipment is operated at a hazardous voltage. Failure to observe the safety instructions in
this manual may result in serious injury, death or property damage.
Before the device is connected to the power supply, a grounding conductor must be connected to
the earth terminal of the device.
The power supply should be connected with a short, low-inductance cable.
Before operation, check that all cables and lines work properly and are undamaged. Ensure in
particular that the cables do not have kinks, that they are not wound too tightly around
corners, and that no objects are placed on the cables.
Ensure that all connections are secure—make sure that the lock screws of the power
supply plug are tightened when using a 3-pin MSTB or 5-pin MSTB connector (see diagram,
LANTIME M300 power supply).
-
+
U = 100 - 200 V
N
U = 90 - 250 V
max
5-Pin MSTB Connector 3-Pin MSTB Connector
Faulty shielding or cabling and improperly connected plugs are a health & safety risk (risk of
injury or death due to electrical shock) and may damage or even destroy your Meinberg device or
other equipment.
Ensure that all necessary safety precautions have been taken. Connect all cables to the device
only while the device is de-energized before turning on the power. Observe the safety instructions
on the device itself (see safety symbols).
The metal chassis of the device is grounded. When installing the device in an electrical enclosure,
it must be ensured that adequate clearance is provided, creepage distances to adjacent conductors
are maintained, and that there is no risk of short circuits.
In the event of a malfunction or if servicing is required (e.g., damage to the chassis or power cable,
ingress of fluids or foreign objects), the power supply may be cut off.
Please address any questions regarding your building’s electrical, cable or antenna installations
to the person or department responsible for that installation within your building.
6 Date: October 27, 2022 LANTIME

2 Important Safety Information
AC Power Supply
DC Power Supply
•The device is a Protection Class 1 device and
may only be connected to a grounded outlet
(TN system).
•For safe operation, the installation must be
protected by a fuse of a rating not exceeding
16 A and equipped with a residual-current
circuit breaker in accordance with applicable
national standards.
•The disconnection of the appliance from the
mains power supply must always be performed
from the mains socket and not from the
appliance itself.
•Mains-powered appliances are equipped with
a safety-tested mains cable designed for use
in the country of operation and may only be
connected to a grounded shockproof socket,
otherwise electric shock may occur.
•Make sure that the mains socket on the
appliance or the mains socket of the house
installation is readily accessible for the user
so that the mains cable can be pulled out of
the socket in an emergency.
•In accordance with IEC 62368-1, it must be
possible to disconnect the appliance from the
supply voltage from a point other than the
appliance itself (e.g., from the primary circuit
breaker).
•The power supply plug may only be fitted or
dismantled while the appliance is isolated
from the power supply (e.g., disconnected at
the primary circuit breaker).
•Supply cables must be adequately secured
and have an adequate wire gauge size.
Connection Cable Wire Gauge:
1 mm2–2.5 mm2
17 AWG –13 AWG
•The power supply of the device must have a
suitable disconnection mechanism such as a
switch. This disconnection mechanism must
be readily accessible in the vicinity of the
appliance and marked accordingly as a cut-
off mechanism for the appliance.
LANTIME Date: October 27, 2022 7

2.5 Connection of Protective Earth Conductor/Grounding
ATTENTION!
In order to ensure that the device can be operated safely and to meet the requirements of
IEC 62368-1, the device must be correctly connected to the protective earth conductor via
the protective earth connection terminal.
If an external ground connection is provided on the housing, it must be connected to the
grounding busbar (earthing busbar) for safety reasons before connecting the power supply.
Like this, any possible leakage current on the housing is safely discharged to earth.
The screw, washer and toothed lock washer necessary for mounting the grounding cable are
located at the grounding point of the housing. A grounding cable is not included in the contents
of delivery.
Note:
Please use a grounding cable with cross-section ≥1.5 mm2, as well as a
suitable grounding clamp/lug. Always ensure that the connection is properly crimped!
8 Date: October 27, 2022 LANTIME

2 Important Safety Information
2.6 Safety During Operation
WARNING!
Avoiding Short-Circuits
Protect the device against all ingress of solid objects or liquids. Ingress presents a risk of
electric shock or short-circuiting!
Ventilation Slots
Ensure that ventilation slots are clean and uncovered at all times. Blocked ventilation slots
may cause heat to be trapped in the system, resulting in overheating. This may cause your device to
malfunction or fail.
Appropriate Usage
The device is only deemed to be appropriately used and EMC limits (electriomagnetic compatibility)
are only deemed to be observed if the chassis cover is properly fitted (thus ensuring that the device
is properly cooled, fire-safe, and shielded against electrical, magnetic and electromagnetic fields).
Switching the Device Off in the Event of a Malfunction or when Repairs are Required
It is not sufficient to simply switch off the device itself in order to disconnect the power supply.
If the device is malfunctioning, or if repairs become necessary, the device must be isolated from all
power supplies immediately.
To do so, follow the procedure below:
- Switch off the device from the unit itself.
- Pull out all power supply plugs.
- Inform the person or department responsible for your electrical installation.
- If your device is connected to an Uninterruptible Power Supply (UPS), it will remain
operational even after pulling the UPS power cable from the mains socket. In this case, you
will need to shut down your UPS in accordance with the user documentation of your UPS
system.
LANTIME Date: October 27, 2022 9

2.7 Safety during Maintenance
WARNING!
The device must never be opened. Repairs to the device may only be performed by the
manufacturer or by authorized personnel. Improper repairs may expose the user to
considerable safety risks (electric shock, fire hazard).
Opening the device or individual device components in an unauthorized fashion may
also expose the user to considerable risks and invalidate your warranty.
Meinberg Funkuhren accepts no liability for consequences arising from such
unauthorized actions.
Danger from moving parts—do not touch moving parts.
Parts of the device may become very hot during operation. Do not touch these surfaces!
If necessary, switch off the device before installing or removing any equipment, and
allow it to cool down.
10 Date: October 27, 2022 LANTIME

2 Important Safety Information
2.8 Handling of Batteries
WARNING!
The lithium battery on the receiver modules has a life of at least ten years. Should it be
necessary to replace it, please note the following:
Improper handling of the battery can lead to an explosion or to a leakage of flammable liquids or
gases.
•Never short-circuit the battery.
•Never attempt to recharge the battery.
•Never throw the battery into a fire.
•The battery must only be exposed to the barometric pressure range specified by the battery
manufacturer.
•The battery must only ever be replaced with one of the same type or a comparable type
recommended by the manufacturer. The battery must only be replaced by the manufacturer or
an authorized technician.
•Never dispose of the battery in a mechanical crusher or shredder, or in an open fire or
furnace.
Please consult your local waste disposal regulations for information on how to dispose of
hazardous waste.
IMPORTANT!
The battery is used to power components such as the RAM and the reserve real-time backup
clock for the reference clock.
If the battery voltage drops below 3 V DC, Meinberg recommends having the battery replaced.
If the battery voltage drops below the specified minimum, the following behavior may be
observed in the reference clock:
•The reference clock may have the wrong date or wrong date upon power-up
•The reference clock repeatedly starts in Cold Boot mode
•Some of the configurations saved for the reference clock may be lost
LANTIME Date: October 27, 2022 11

2.9 Cleaning and Care
ATTENTION!
Never clean the device using liquids! Water ingress is a significant safety risk for
the user (e.g., electric shock).
Liquids can cause irreparable damage to the electronics of the device! The ingress of
liquids into the device chassis may cause short circuits in the electronic circuitry.
Only clean with a soft, dry cloth. Never use solvents or cleaners.
2.10 Prevention of ESD Damage
ATTENTION!
An ESDS device (electrostatic discharge-sensitive device) is any device at risk of damage or
malfunction due to electrostatic discharges (ESD) and thus requires special measures to prevent
such damage or malfunction. Systems and modules with ESDS devices usually bear the following
symbol:
Symbol Indicating Devices with ESDS Components
The following measures will help to protect ESDS components from damage and malfunction.
When preparing to dismantle or install devices:
Ground your body (for example, by touching a grounded object) before touching sensitive devices.
Ensure that you wear a grounding strap on your wrist when handling such devices. These straps must
in turn be attached to an uncoated, non-conductive metal part of the system.
Use only tools and devices that are free of static electricity.
When transporting devices:
Devices must only be touched or held by the edges. Never touch any pins or conductors on the device.
When dismantling or installing devices:
Avoid coming into contact with persons who are not grounded. Such contact may compromise your
connection with the earth conductor and thus also compromise the device’s protection from any
static charges you may be carrying.
When storing devices:
Always store devices in ESD-proof ("antistatic") bags. These bags must not be damaged in any way.
ESD-proof bags that are crumpled or have holes cannot provide effective protection against
electrostatic discharges.
ESD-proof bags must have a sufficient electrical resistance and must not be made of conductive
metals if the device has a lithium battery fitted on it.
12 Date: October 27, 2022 LANTIME

2 Important Safety Information
2.11 Return of Electrical and Electronic Equipment
ATTENTION!
WEEE Directive on Waste Electrical and Electronic Equipment 2012/19/EU
(WEEE Waste Electrical and Electronic Equipment)
Waste Separation
Product Category: According to the device types listed in Annex I of the WEEE Directive,
this product is classified as "IT and Telecommunications Equipment".
This product satisfies the labeling requirements of the WEEE Directive. The product symbol on
the left indicates that this electronic product must not be disposed of in domestic waste.
Return and Collection Systems
When disposing of your old equipment, please use the national return or collection systems
available to you. Alternatively, you may contact Meinberg, who will provide further assistance.
The return of electronic waste may not be accepted if the device is soiled or contaminated in
such a way that it potentially presents a risk to human health or safety.
Return of Used Batteries
The EU Battery Directive prohibits the disposal of batteries marked with the WEEE trashcan
symbol above in household waste.
LANTIME Date: October 27, 2022 13

3 General Information about LANTIME
LANTIME stands for Local Area Network Time Server. The LANTIME provides an absolute and highly precise
time reference in a TCP/IP network (stratum 1 server). The time is made available to all NTP clients via
the NTP protocol (Network Time Protocol) and allows easy integration of an absolute time reference into an
existing network.
The individual LANTIME variants differ mainly in the time reference source used. An external radio clock,
a built-in GPS, GNSS (GPS, GLONASS, Galileo, BeiDou), or GNS-UC (only GPS and Galileo) satellite re-
ceiver, an IRIG time code receiver, a long-wave radio receiver (DCF77, MSF, WWVB), external NTP servers, or
a hybrid DCF77/GNSS receiver system can be used as a time reference source. A GNSS-synchronized LAN-
TIME, for example, consists of a GNSS satellite receiver, a single-board computer with an integrated network
card, and a power supply unit.
A simplified LINUX operating system is implemented on the single-board computer and is loaded from a flash
disk during the boot phase. All settings can be made using eight pushbuttons and a display*. The time server
can also be remotely configured via network over SSH, FTP, or Telnet. An integrated web server provides access
to the LANTIME via any standard web browser.
*LANTIME M100 time servers do not have a display or function keys. Instead, these systems are configured and monitored via the LANTIME Web
Interface, SSH, Telnet, or FTP.
14 Date: October 27, 2022 LANTIME

4 LANTIME Chassis: Technical Specifications
4 LANTIME Chassis: Technical Specifications
Chassis: 19" Multipac Chassis, 1U
Chassis Material: Sheet Steel
——————————————————————————-
Temperature Range
Operation: 0–50 ◦C (32–122 ◦F)
Storage: -20–70 ◦C (-4–158 ◦F)
——————————————————————————-
Relative Humidity
Operation: Max. 93 % (Non-Condensing) at 40 ◦C
——————————————————————————-
Maximum Altitude
Operation: Max. 4000 m / 13123 ft (Above Sea Level)
——————————————————————————-
Acoustics: 0 dB (A)
IP Rating: IP20
LANTIME Date: October 27, 2022 15

Chassis Dimensions
483 mm 19 inch
465 mm 18.31 inch
31,8 mm 1.25 inch
43,6 mm 1.72 inch
445 mm 17.51 inch
304 mm 11.98 inch
288 mm 11.32 inch
External Ground Terminal on the Chassis
This terminal must be wired to a bonding busbar (grounding busbar). The terminal is located on the side of
the chassis with the power supply unit. The parts required to establish this connection—not including the
grounding conductor cable itself—are included with the product as shipped.
16 Date: October 27, 2022 LANTIME

5 LANTIME M300 Front Connectors
5 LANTIME M300 Front Connectors
GNS
1 2 3 4 5
1. The main menu is displayed after the device is
switched on and the boot phase is completed. The
main menu provides the most important status infor-
mation. The top line of the display shows the operating
mode of the reference clock / reference time and will
normally read "GNS: NORMAL OPERATION", al-
though "GNS: COLD BOOT", "GNS: WARM BOOT",
or "GNS: UPDATE ALMANAC" may also appear. If
the antenna connection is disrupted for any reason, the
message "GNS: ANTENNA FAULTY" will be shown.
GNS: NORMAL OPERATION
NTP: Offset: PPS -5us
MON, dd.mm.yyyy
UTC: 12:00:00
2. The four arrows and the "ESC", "OK", "F1", and "F2"
buttons on the keypad can be used to navigate through
each menu in the display. Return to the main menu by
pressing the "ESC" button several times.
LANTIME Date: October 27, 2022 17