Meinberg NTP-SLAVE-CLOCK User manual

MANUAL
NTP-SLAVE-CLOCK
Analog Wall Clock - PoE Power Supply
2nd July 2015
Meinberg Radio Clocks GmbH & Co. KG

Page 0
Table of Contents
1 Imprint 1
2 NTP - Wall Clock with LAN-PoE 2
3 LAN-PoE Converter 4
3.1 Features of the LAN-PoE Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2 MicroProcessorSystem........................................ 4
3.3 DCF77-Port24Emulation....................................... 5
3.4 SerialPort............................................... 5
3.5 Technical Specications LAN-PoE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.5.1 Connectors........................................... 7
3.5.2 Format of the Meinberg Standard Time String . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Initial Start of Operation 9
4.1 PowerSupply ............................................. 9
4.2 NetworkConguration ........................................ 9
4.2.1 DHCP............................................. 9
4.2.2 ARPMethod ......................................... 9
4.3 Extended Conguration via Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3.1 Menu Option 0: Server conguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3.2 Menu Option 1: Security conguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3.3 Menu Option 2: SNMP Conguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3.4 Menu Option 3: Syslog Conguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3.5 Menüpunkt 4: DCF_Mark Conguration . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3.6 Menu Option 5: Time Zone Conguration . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3.7 Menu Option 6: NTP Client Conguration . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3.8 Menu Option 7: Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3.9 Menu Option 8: Exit without save . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3.10 Menu Option 9: Save and exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5 Declaration of Conformity 15
0 Date: 2nd July 2015 NTP-SLAVE-CLOCK

Page 1
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 - 30
Internet: http://www.meinberg.de
Mail: [e-mail]
Date: 2015-03-18
NTP-SLAVE-CLOCK Date: 2nd July 2015 1

Page 2 2 NTP - Wall Clock with LAN-PoE
2 NTP - Wall Clock with LAN-PoE
Case: Ø cir. 300 mm, depth cir. 55 mm
Ø cir. 400 mm, depth cir.ca. 55 mm
metal case, white or black painted
Protection Rating: IP 40 (EN 60529)
LAN-Bus: For running NTP slave clocks a time server is required.
Front Glass: Domed mineral glass on 300 mm cases, shock-resistant.
Plexiglas on 400 mm case.
Face: High distinction white metal with black arabic numerals for easy,
doubt-free reading even over longer distances.
Face printed according to DIN 41091.
Hands: Black bar-type hour and minute hands, red second hand.
PoE: NTP slave clocks require a PoE (Power over Ethernet) power supply.
Appropriate hardware has to be supplied by customer.
2 Date: 2nd July 2015 NTP-SLAVE-CLOCK

Page 3
Connection Diagram
Funkuhren GmbH &
Co. KG
LAN-PoE
Power over Ethernet - NTP Client
Diagnostic
Link
DCF
NTP Time Server
Network SwitchLAN-PoE
NTP
NTP
DCF_Port24
Rear View - Wall Clock with LAN-PoE Module
NTP-SLAVE-CLOCK Date: 2nd July 2015 3

Page 4 3 LAN-PoE Converter
3 LAN-PoE Converter
The LanPoE converter module uses its NTP synchro-
nized timebase to generate DCF-Port 24 pulses. Power
over Ethernet technology lets the user install a synchro-
nized clock system without the cost of installing AC
outlets. The existing Ethernet LAN is used to power
the module and also to synchronize the time informa-
tion. It is possible to congure a number of LanPoE
converters via Telnet.
Wherever a PoE-Ethernet is not available, it is rec-
ommended to use a simple midspan power injector as
a power supply. Conguration of the time zone as well
as changes of daylight saving conguration occurs via
Telnet. The free running clock is beeing synchronized
cyclic via the network connection (10/100MBit, RJ45)
by a NTP time server using the Network Time Protocol.
The UTC time from the NTP server is converted into
the users local time by congurable parameters and the
DCF-Port 24 pulses are generated correspondingly.
Funkuhren GmbH & Co. KG
Lange Wand 9
31812 Bad Pyrmont / Germany
LAN-PoE
Power over Ethernet - NTP Client
Diagnostic
Link
DCF
3.1 Features of the LAN-PoE Converter
The LANPOE Converter unit is a stand-alone free running clock with integrated power over Ethernet supply. A
time string is sent via the serial port periodically once per second after synchronization with NTP. The format of
the time string is described in the section "Technical Specications". Baudrate and framing are set to 9600 baud,
8N1. This conguration is not to be changed. The module generate also an DCF77_PORT24 output signal.
3.2 Micro Processor System
The time strings received from the network are decoded by the microprocessor system. The checked and decoded
time is written to the on-board software clock and the DCF77_Port24 interface. A watchdog lets the micropro-
cessor recover from malfunction. A power-fail comparator resets the microprocessor if the supply voltage drops
below a specied threshold.
4 Date: 2nd July 2015 NTP-SLAVE-CLOCK

3.3 DCF77-Port24 Emulation Page 5
3.3 DCF77-Port24 Emulation
The Converter generate an time mark signal which is compatible with the time marks spread by the German long
wave transmitter DCF77. This time mark are available as an demodulated time signal at each DFK-connector.
The pulse voltage is 15 V/DC (aktiv low DCF77-Marks) with max. pulse current of 80 mA. The coding sheme
is given below:
0
10
20
30
40
50
R
M
1
4
2
1
0
2
10
8
4
2
1
P2
20
0
1
8
4
2
1
2
4
8
10
1
2
4
8
10
20
40
80
P3
A1
1
Z
Z2
A2
S
1
2
4
8
10
20
40
P1
Kodierung
nach Bedarf
Minute
Stunde
Kalendertag
Wochentag
Kalender-
monat
Kalenderjahr
M Minutenmarke (0.1 s)
R Aussendung über Reserveantenne
A1 Ankündigung Beginn/Ende der Sommerzeit
Z1, Z2 Zonenzeitbits
Z1, Z2 = 0, 1: Standardzeit (MEZ)
Z1, Z2 = 1, 0: Sommerzeit (MESZ)
A2 Ankündigung einer Schaltsekunde
S Startbit der codierten Zeitinformation
P1, P2, P3 gerade Paritätsbits
3.4 Serial Port
One asynchronous serial interface (RS-232) called COM are available to the user. A time string is sent via the
serial port periodically once per second after synchronization with NTP. The format of the time string is described
in the section "Technical Specications". Baudrate and framing are set to 9600 baud, 8N1. This conguration
is not to be changed.
NTP-SLAVE-CLOCK Date: 2nd July 2015 5

Page 6 3 LAN-PoE Converter
3.5 Technical Specifications LAN-PoE
Interface: one serial RS232
Baudrate: 9600
Framing: 8N1
Output String: after synchronization with NTP,
see "Format of the Meinberg Standard Time String"
Outputs: DCF_Port24
pulse voltage: 15 V (active low DCF77 pulses)
pulse current: 80mA max.
over 2-pol. Phoenix DFK connector
NTP Request Time: LAN-PoE Converter inquires the time information from the NTP server
and sets its own free-running clock every 64s
Status-LEDs: three status LEDs; Diagnostic, Link, DCF
Connectors: RJ45 10/100MBit Ethernet connector (IEEE802.3af, PoE)
D-SUB9 female connector
DFK-2 connector
Physical
Dimensions: 24mm x 71mm x 84mm / height x width x depth
Power
Requirements: PoE (Power over Ethernet)
Ambient Temperature: 0 ... 50
◦
C
Humidity: 85% max.
6 Date: 2nd July 2015 NTP-SLAVE-CLOCK

3.5 Technical Specications LAN-PoE Page 7
3.5.1 Connectors
Label Connector Type Cable
-
LAN(PoE) RJ-45 Ethernet with PoE 10 MBit data line
COM 9pin SUB-D RS232 shielded data line
Pin 2 - TxD;
Pin 3 - RxD;
Pin 5 - GND;
DCF_Port24 DFK DCF_Port24
CE Label
This device conforms to the directive 2004/108/EC
on the approximation of the laws of the Member
States of the European Community relating to
electromagnetic compatibility.
NTP-SLAVE-CLOCK Date: 2nd July 2015 7

Page 8 3 LAN-PoE Converter
3.5.2 Format of the Meinberg Standard Time String
The Meinberg Standard Time String is a sequence of 32 ASCII characters starting with the STX (start-of-text)
character and ending with the ETX (end-of-text) character. The format is:
<STX>D: dd.mm.yy;T:w;U:hh.mm.ss;uvxy <ETX>
The letters printed in italics are replaced by ASCII numbers whereas the other
characters are part of the time string. The groups of characters as dened below:
<STX> Start-Of-Text, ASCII Code 02h
sending with one bit accuracy at change of second
dd.mm.yy the current date:
dd day of month (01..31)
mm month (01..12)
yy year of
the century (00..99)
w the day of
the week (1..7, 1 = Monday)
hh.mm.ss the current time:
hh hours (00..23)
mm minutes (00..59)
ss seconds (00..59, or 60 while leap second)
uv clock status characters (depending on clock type):
u: `#' GPS: clock is running free (without exact synchr.)
PZF: time frame not synchronized
DCF77: clock has not synchronized after reset
` ` (space, 20h)
GPS: clock is synchronous (base accuracy is reached)
PZF: time frame is synchronized
DCF77: clock has synchronized after reset
v: `*' GPS: receiver has not checked its position
PZF/DCF77: clock currently runs on XTAL
` ` (space, 20h)
GPS: receiver has determined its position
PZF/DCF77: clock is syncronized with transmitter
x time zone indicator:
`U' UTC Universal Time Coordinated, formerly GMT
` ` CET European Standard Time, daylight saving disabled
`S' (CEST) European Summertime, daylight saving enabled
y anouncement of discontinuity of time, enabled during last hour before discontinuity comes in eect:
`!' announcement of start or end of daylight saving time
`A' announcement of leap second insertion
` ` (space, 20h) nothing announced
<ETX> End-Of-Text, ASCII Code 03h
8 Date: 2nd July 2015 NTP-SLAVE-CLOCK

Page 9
4 Initial Start of Operation
4.1 Power Supply
The local area network must support IEEE 802.3af Power over Ethernet (PoE) in order for the LAN-PoE Converter
to operate.
After network connection has been established and the LANPOE Converter has successfully synchronized, the
unit generate the time of the reached NTP server, the congured time zone is taken into consideration. This is
indicated by the yellow LED which starts blinking exactly once per second, corresponding to the time marks from
DCF77.
4.2 Network Configuration
To identify the LANPOE Converter in the network it is neccessary to set the unique 32 bit TCP/IP address by the
network administrator. Now conguration is possible by using a Telnet connection via ethernet. Initialization of
the TCP/IP address for the rst time may occur by two dierent ways: the network parameters are either given
automatically by a DHCP server or set manually by the below described ARP method.
4.2.1 DHCP
If there is a DHCP server (Dynamic Host Conguration Protocol) installed in the network the described congu-
ration can be done very easy as follows: When the TCP/IP address is 000.000.000.000 (factory default) a DHCP
client is started automatically. This client took the corresponding network parameters from a DHCP server and
congures the network installation of LANPOE Converter itself. The default hostname of the LANPOE Converter
is Cxxxxxx, where xxxxxx is the last 6 digits of the MAC address. The MAC address of the internal netcard
(Hw-Addr) is labeled beside the RJ45 connector.
4.2.2 ARP Method
This method is available under UNIX and Windows based systems. LANPOE Converter will set its address from
the rst directed TCP/IP packet it receives.
1. Step
On a UNIX host, create an entry in the host's ARP table using the intended IP address and the hardware address
of the Device Server, which is found on the label beside the RJ45 connector in the front panel.
In order for the ARP command to work on Windows, the ARP table on the PC must have at least one IP
address dened other than its own. If the ARP table is empty, the command will return an error message. Type
"arp -a" at the DOS command prompt to verify that there is at least one entry in the ARP table.
If the local machine is the only entry, ping another IP address on your network to build a new entry in the
ARP table; the IP address must be a host other than the machine on which you are working. Once there is at
least one additional entry in the ARP table, use the following command to ARP an IP address to the LANPOE
Converter:
ARP on Windows:
arp -s 191.12.3.77 00-20-4A-xx-xx-xx
ARP on Unix:
arp -s 191.12.3.77 00:20:4A:xx:xx:xx
NTP-SLAVE-CLOCK Date: 2nd July 2015 9

Page 10 4 Initial Start of Operation
2. Step
Now open a Telnet connection to port 1. The connection will fail quickly (3 seconds), but the LANPOE Converter
will temporarily change its IP address to the one designated in this step: telnet 191.12.3.77 1
3. Step
Finally, open a Telnet connection to port 9999 and set all required parameters in the conguration menu of the
Converter.
telnet 191.12.3.77 9999
10 Date: 2nd July 2015 NTP-SLAVE-CLOCK

4.3 Extended Conguration via Telnet Page 11
4.3 Extended Configuration via Telnet
As soon as the network parameters of the LANPOE Converter module are correctly set, you can start conguring
the unit by using a standard Telnet client. All you need to know is the IP address of the LANPOE Converter
module and the correct access password. The default password is meinberg.
You need to connect to port 9999 of the module, so please start a telnet session with the IP address of the
unit and port 9999.
Please note: Telnet sessions are always unencrypted, even the password is transmitted in plain text.
It is highly recommended to only connect to the module via Telnet in a secure, separated network in order
to avoid a network snier to nd out your password. The safest method is to directly connect a laptop with a
crosslink cable and use this laptop to congure the unit.
The changes made during the Telnet session are activated after you left the setup with Menu Option 9 (Save and
Exit). Only in this case the parameters are stored permanently and the module is restarted.
After you initiated a Telnet connection with the LANPOE Converter, you are presented the Welcome message
and have to enter the access password. If the password has been entered correctly, you have to press enter again
to start the setup tool:
*** NTP Slave Clock V1.00 :Meinberg Funkuhren ***
Hardware : Ethernet TPI
NTP Slave Clock addr : 172.16.3.234, gateway 172.16.3.1, netmask 255.255.0.0
NTP Time Server IP 1 : 172.16.3.235
NTP Time Server IP 2 :  not set 
Display delay time [+/-ms] : 0
NTP client stratum [1-15] : 10
DCF_Mark output : aktiv high
Time Zone Daylight on : Sun after 25.03 at 02:00 UTC +120min
Time Zone Daylight o : Sun after 25.10 at 03:00 UTC +60min
SNMP community name for read : public
SNMP community name for write : public
SNMP manager IP address 1 :  not set 
SNMP manager IP address 2 :  not set 
SNMP manager IP address 3 :  not set 
SYSLOG is disable Server IP :  not set 
Change Setup: 0 Server conguration 5 Time Zone conguration
1 Security conguration 6 NTP client conguration
2 SNMP conguration 7 factory defaults
3 SYSLOG conguration 8 exit without save
4 DCF_Mark output 9 save and exit
Your choice ?
NTP-SLAVE-CLOCK Date: 2nd July 2015 11

Page 12 4 Initial Start of Operation
4.3.1 Menu Option 0: Server configuration
The setup of the network parameters can be altered here:
IP Address : (172) .(016) .(003) .(202)
Set Gateway IP Address (Y) Y
Gateway IP Address : (172) .(016) .(003) .(002)
Netmask: Number of Bits for Host Part (0=default) (24)
IP addresses in the Telnet setup are entered as four separate decimal numbers (0-255), the Setup always shows
the number to be changed and waits for an input. It looks like this:
IP Address : (172) _
_ represents the cursor. Enter a new value and press RETURN. If you press RETURN without entering a
new value, the old one is taken. After RETURN the next number is displayed:
IP Address : (172) 192 .(016) _
Now you can enter the second part of your IP address and conrm it with RETURN. Afterwards you can enter
the third and nally the fourth part of the address. After entering all four parts the screen looks like this:
IP Address : (172) 192 .(016) 168 .(003) 100 .(202) 11
So, in this example you changed the IP address from 172.16.3.202 to 192.168.100.11.
The netmask for this converter has to be dened as a single decimal number representing the number of re-
served bits of the host part. If your netmask has to be set to 255.255.255.0, 24 bits are set for the net part and
8 bits reserved for the host part. So you would have to enter a 8. A netmask of 255.255.0.0 is represented by a
16, in order to dene a netmask of 255.0.0.0 you would have to enter 24.
Class A: 24 bits e.g. 255.000.000.000
Class B: 16 bits e.g. 255.255.000.000
Class C: 8 bits e.g. 255.255.255.000
4.3.2 Menu Option 1: Security configuration
Setting the Telnet conguration password prevents unauthorized access of the setup menu via a Telnet connection
to port 9999. Default password is meinberg. To change this password enter this menu by pressing 1 and return.
After the password is changed it has to be acknowledged by reentering it.
4.3.3 Menu Option 2: SNMP Configuration
Here you can setup the SNMP parameters:
SNMP community name for read (public):
The SNMP community value is some kind of a rudimentary access control. Every SNMP request pointed to
the module includes a community string dened by the originator of the request. This community is checked
against the congured community names and a reply is only sent if they matched. In order to improve SNMP
security, the Converter module additionally checks the IP address of the SNMP client and only accepts requests
by hosts congured as SNMP trap receivers. So, if you want to send SNMP requests to the module, you have to
dene the IP address of your PC as a SNMP trap receiver (see below).
SNMP community name for write (rwpublic):
An incoming SNMP request coming with this community string is granted read-writeaccess, meaning you can
change a value. At the moment there are no variables accessible for write-access, so this value can be used to
add a second SNMP community to be accepted by the module.
12 Date: 2nd July 2015 NTP-SLAVE-CLOCK

4.3 Extended Conguration via Telnet Page 13
Enter IP addresses for SNMP traps:
1: (172) .(016) .(003) .(002)
2: (172) .(016) .(003) .(045)
3: (000) .(000) .(000) .(000)
Here you can enter up to three SNMP trap receivers. As describe above, these IP addresses are additionally
used to authenticate SNMP requests. You nd a description of how to enter IP addresses in the Menu Option 1
section (see above).
A description of the supported SNMP variables and the MIB can be found in the SNMP Reference section
of this manual.
4.3.4 Menu Option 3: Syslog Configuration
This option allows you to congure a syslog server. The module is sending event log messages to UDP port
514(=syslog) and the congured server can record them, for example. Please note that you need to congure
your syslog service to accept remote messages. Otherwise the messages are dropped by the syslog server without
further notice.
A syslog server is dened like this:
******** SYSLOG Conguration ********
Use SYSLOG logging? (Y) Y
Enter IP address for SYSLOG server:(172) .(016) .(003) .(002)
4.3.5 Men¨ upunkt 4: DCF Mark Configuration
In this Menue, you can change the polarity at your DCF output.
0 = activ high; 1 = activ low
4.3.6 Menu Option 5: Time Zone Configuration
Select 5 to congure the Converter's time zone settings. The NTP time is a linear time scale similar to UTC,
without information about the time zone. This menu lets the user enter the range of date for daylight saving to
be in eect as well as the local times's oset to UTC.
Beginning and ending of daylight saving may either be dened by exact dates for using an algorithm which
allows the converter to recompute the eective dates year by year. Then, starting from the congured date,
daylight saving changes the rst day which matches the congured day-of-week. For example March 25, 1994 is
a Friday, so the next Sunday is March 27, 1994.
4.3.7 Menu Option 6: NTP Client Configuration
Select 6 to enter the Converter's NTP conguration.
NTP Server
The IP address of up to three NTP servers can be entered here. First the rst NTP server is tried to achieve.
If this fails, the second and than the third NTP server is queried. In case of 0.0.0.0 is entered for the rst NTP
server, the Converter tries to nd a NTP server itself.
Display Delay Time
This value causes the Converter to display the time delayed. It should be set to zero because of the internal
compensation of the propagation time.
NTP Client Stratum
NTP-SLAVE-CLOCK Date: 2nd July 2015 13

Page 14 4 Initial Start of Operation
A NTP stratum can be assigned to the Converter. If the NTP server has a higher stratum during the request
than the Converter, the time infomation is rejected.
4.3.8 Menu Option 7: Factory Defaults
You can reset your conguration by choosing this option. Please note that network parameters are not altered
(you have to change them manually by using Menu Option 1). If you have chosen this option by accident, just
abort the Telnet Session by using Menu Option 7 and reconnect.
4.3.9 Menu Option 8: Exit without save
If you changed something by accident or did not change anything, you can leave the Telnet setup by choosing
this option. The telnet session is closed without saving the changes and without a reboot.
4.3.10 Menu Option 9: Save and exit
All parameters are saved in the nonvolatile memory of the module and afterwards the unit restarts in order to
put the changes into eect. After 10  30 seconds the Converter module has nished rebooting and can be used
again.
14 Date: 2nd July 2015 NTP-SLAVE-CLOCK

Page 15
5 Declaration of Conformity
Konformitätserklärung
Doc ID: NTP-SLAVE-CLOCK-PoE-2015-03-18
Hersteller Meinberg Funkuhren GmbH & Co. KG
Manufacturer Lange Wand 9, D-31812 Bad Pyrmont
erklärt in alleiniger Verantwortung, dass das Produkt,
declares under its sole responsibility, that the product
Produktbezeichnung NTP-SLAVE-CLOCK-PoE
Product Designation
auf das sich diese Erklärung bezieht, mit den folgenden Normen übereinstimmt
to which this declaration relates is in conformity with the following standards
EN55022:2010, Class A Limits and methods of measurement of radio interference characteristics of
information technology equipment
EN55024:2010 Limits and methods of measurement of Immunity characteristics of information
technology equipment
EN 50581:2012 Technical documentation for the assessment of electrical and electronic products
with respect to the restriction of hazardous substances
gemäÿ den Richtlinien 2004/108/EG (Elektromagnetische Verträglichkeit), 2006/95/EG (Niederspannungsrichtlinie),
2011/65/EU (Beschränkung der Verwendung bestimmter gefährlicher Stoe) und 93/68/EWG (CE Kennzeichnung)
sowie deren Ergänzungen.
following the provisions of the directives 2004/108/EC (electromagnetic compatibility), 2006/95/EC (low voltage
directive), 2011/65/EU (restriction of the use of certain hazardous substances) and 93/68/EEC (CE marking) and
its amendments.
Bad Pyrmont, 2015-03-18
NTP-SLAVE-CLOCK Date: 2nd July 2015 15