Mobatime DTS 4801.masterclock Instruction Manual Download Page 21

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800652.11

6.3 Main

menu

Menus:

Status

Display of various information regarding operation and environment
See Chapter “6.4 Status Menu“

Configuration Configuration of the DTS 480x

See Chapter “6.5 Configuration Menu“

Maintenance Software update, backup and restore

See Chapter “6.6 Maintenance Menu“

Summary of Contents for DTS 4801.masterclock

Page 1: ...MOBATIME BE 800652 11 MOUNTING AND INSTRUCTION MANUAL Net Master Clock DTS 4801 masterclock DTS 4802 masterclock Network Timeserver and Master Clock...

Page 2: ...rsion can be obtained from the Mobatime website 3 This Instruction Manual has been composed with the utmost care in order to explain all details in respect of the operation of the product Should you h...

Page 3: ...es 71 8 Time administration 77 9 SNMP 83 10 Description of the switch function 90 APPENDIX A Connection diagrams 92 B Time Zone Table 96 C Alarm List 99 D Troubleshooting 101 E Serial Telegrams 102 F...

Page 4: ...gram 41 6 5 11 Time handling 45 6 5 12 General time configuration 46 6 5 13 Time source 47 6 5 14 NTP server 48 6 5 15 Communication Alarm Network CAN to MTC 52 6 5 16 Manual time set 53 6 5 17 Alarms...

Page 5: ...n spring terminals 95 A 5 Connection of GPS 4500 DCF 450 4500 or GNSS 3000 95 B Time Zone Table 96 C Alarm List 99 C 1 Alarms 99 D Troubleshooting 101 E Serial Telegrams 102 E 1 General 102 E 2 Syntax...

Page 6: ...ssage to avoid damages to property and devices Notice Additional information for the use of the device 1 3 Intended Use The DTS 480x masterclock is a master clock for the use in network environments I...

Page 7: ...moisture and avoid dust heat and direct sunlight Do not use the device outdoors The device is designed for 19 racks and should only be operated installed in a 19 cabinet Danger Make sure that you wait...

Page 8: ...nnot rectify this problem yourself 2 2 Cleaning Please make sure that the device remains clean especially in the area of the connections the control elements and the display elements Clean your device...

Page 9: ...cial features of the individual models 3 4 Device Description The DTS 480x masterclock is a master clock for use in network environments It can be synchronized both from NTP and also function as an NT...

Page 10: ...locks As part of the DTS system it functions as a master clock or clock line 3 5 Device types Model Characteristics Product no DTS 4801 masterclock According to the description above 1 clock line MOBA...

Page 11: ...ate and alarm information It supports DTS devices as well as all MOBATime analog and digital network clocks and can handle a network with more than 1000 devices This software provides extensive functi...

Page 12: ...tor for NTP and time zone packages editor for time zone files online help etc 3 7 2 Device management All MOBATime network devices are displayed in the so called device view Here the devices can be gr...

Page 13: ...ing flashing till NTP synch Lost alarm appears or an external time source is available after restart Synchronization source is not available Off when alarm Failure time source Str occurs See chapter 6...

Page 14: ...g Display button First press the button briefly Switch on the background light Other buttons to press briefly Scroll through all displays Press button longer 3 sec Change to default display time and d...

Page 15: ...tputs 5 3 Boot procedure of the DTS 480x masterclock The normal booting time of the DTS 480x is approx 60 sec with pre set IP or with DHCP The booting procedure of the operating system is displayed on...

Page 16: ...0ms Synch only offset off Lines DCF output off UTC Lines 1 and 2 on MOBALine MEZ NTP slave clocks Time zone server off RS485 telegram off switching function off Network DHCP on DHCPv6 off Autoconf IPv...

Page 17: ...as user The standard password is dts Changing the password see Chapter 4 4 20 General Settings Only one menu can be open at any time The first menu started has priority The menu is automatically clos...

Page 18: ...h ENTER When rebooting the boot process will be displayed on the serial console Attention The serial connection should always be disconnected before switching off the operating PC exit terminal progra...

Page 19: ...entries must be completed with ENTER Return e g also ESC The menu window can always be exited with Ctrl C incl termination of the Telnet and SSH connection The desired menu can be selected with the r...

Page 20: ...inal menu and designated accordingly Example The terminal menu Configuration Alarms can be found in MOBA NMS under the tab Alarms Configuration example of a DTS 4801 masterclock For further details on...

Page 21: ...Display of various information regarding operation and environment See Chapter 6 4 Status Menu Configuration Configuration of the DTS 480x See Chapter 6 5 Configuration Menu Maintenance Software updat...

Page 22: ...splay of the DTS 480x alarm record newest alarm first The ALARM RECORD menu pages can be scrolled through with ENTER The ALARM RECORD menu page can be exited with 99 Max length of error report 240 mes...

Page 23: ...MOBATIME 23 120 800652 11 Status menu page 2 Display of information with regard to the internal state of the NTP server...

Page 24: ...ent stratum Last measured drift drift before the last quartz correction in Frequency of NTP only for support Time source current time source Offset to source offset to source source system time Jitter...

Page 25: ...eceived from DCF source In information about number of available satellites only with GPS 4500 With a DCF receiver this is a random value Sec counter DCF the counter is incremented by 1 with each DCF...

Page 26: ...6 5 11 Time handling 3 Alarm settings alarm relais e mail SNMP See chapter 6 5 17 Alarms 4 General settings for the DTS 480x language time zone for alarms and display password for menu See chapter 4...

Page 27: ...apter 6 5 2 MOBALine DCF active code line 2 see chapter 6 5 4 Impulse line see chapter 6 5 5 DCF active code line 2 Line only active with the DTS 4802 DCF Pulse output see chapter 0 DCF Pulse Output S...

Page 28: ...steps 30 second steps or cont 10 sec steps 4 Select time zone see chapter 6 5 28 Time zone selection 5 Select maximum current 0 700mA on the line The line will be switched off for as long as the overc...

Page 29: ...R Option In the case of the DTS 4801 masterclock IRIG B model an IF 488 interface is internally installed The function is only available if the clock line is configured to MOBALine The IF 488 interfac...

Page 30: ...ne will be switched off as long as the overcurrent is connected DTS 4802 The maximum current is divided between both lines i e it can always only be the remainder at the most that can be set as maximu...

Page 31: ...diagrams on the next page 4 Select time zone see chapter 6 5 28 Time zone selection 5 Select maximum current 0 1000mA on the line The line will be switched off as long as the overcurrent is connected...

Page 32: ...1s 2s 3s Mode 3 U 0 t 1s 2s 3s Mode 4 U 0 t 1s 2s 3s Mode 5 U 0 t 1s 2s 3s Mode 6 U 0 t 1s 2s 3s Mode 1 6 2 5 3 4 are equal Their polarity only depends on how the line is connected to the DTS 480x ma...

Page 33: ...s 20 500ms Only active with the pulse output function 5 User defined pulse interval 1 3600 sec only active with pulse type 3 user the value is also only then displayed The pulse always occurs after a...

Page 34: ...0 off 1 send 2 read RS232 3 read RS485 4 send and read read only from RS232 5 send and read read only from RS485 The modes 2 and 3 read RS232 and read RS485 are not yet available 4 Baudrate 300 600 12...

Page 35: ...MOBATIME 35 120 800652 11 Selection of the telegram file The copy procedure of telegram files is explained in chapter 7 10 Copying telegram or program files to DTS 480x masterclock...

Page 36: ...ctionality 5 Select and configure the slave clocks menu RS 485 clock line 6 Display error list history of the clock line error list of the RS 485 slave clock line see the following pages Important To...

Page 37: ...ng is displayed By entering the clock number the page changes to that of the required slave clock 1 Select clock function Clock monitored on or off 2 Clock name for identifying the clock clock locatio...

Page 38: ...Alarm list of the RS485 slave clock line Error number display continuous equipment number clock number name date and time of the error in UTC error name and error number The error list is deleted when...

Page 39: ...s range 1 16 E g poll value 2 interval 22 4 sec poll value 5 interval 25 32 sec For redundant Multicast time servers see remark next page 5 Packet time to Live TTL for NTP and time zone Multicast pack...

Page 40: ...sending NTP Multicast packets the packets from second time server are ignored This configuration is needed to reach a defined situation for the end devices the DTS 480x masterclock with the more frequ...

Page 41: ...r 6 5 28 Time zone selection 2 Selection of the program file changes to the menu SELECTION OF FILE 3 Switch function twilight changes to the menu SWITCH FUNCTION TWILIGHT 4 Control inputs changes to t...

Page 42: ...sunset on the basis of the position entered The accuracy of the calculation is 5 min within the limits 60 north 60 south The switch function can be linked with AND OR or exclusive to a channel 1 Chan...

Page 43: ...te shows if the switch function is on or off The state change of the lines MOBALine and RS485 can be delayed up to 1 min Control inputs Each of the 4 alarm inputs can be linked as control input or swi...

Page 44: ...hed on channel in a locked state An shows that the channel is linked to a control output An s shows that the channel is linked to the twilight calculation By entering a channel the page can be changed...

Page 45: ...l on and lock The channel is switched on immediately and locked in this state 4 Channel off and lock The channel is switched off immediately and locked in this state 5 Unlock channel The channel takes...

Page 46: ...ource Str occurs sync LED turns off 2 Mode leap second 0 Off 1 Additional second is added to the time period set Is set to 0 off after adding the leap second 1 A second is omitted at the time period s...

Page 47: ...e source TO 5 Synch only offset 0 off 100 5000ms Limits as from which time is no longer accepted Alarm Syn only diff too large 6 Fix stratum 0 Stratum is calculated automatically on the basis of the t...

Page 48: ...scribed in chapter 8 2 Time take over NTP Further 2 multicast or broadcast addresses can be configured 1 4 Summary about configured NTP time sources Select to configure and display changes to the menu...

Page 49: ...ion it s better to limit Maxpoll to 6 64 sec 4 Set type of inquiry server or peer 5 Preferred source on or off If possible one source should always be preferred even if only one source is defined exce...

Page 50: ...on in seconds The interval is rounded after the entry to NTP standard which only permits values of format 2x 1 2 4 8 16 32 64 maximum 65536 seconds 3 TTL time to live in hops Only required for multica...

Page 51: ...e the IFF certificate gen_gq generate the GQ certificate gen_mv generate the MV certificate gen_all generate all IFF GQ MV certificates gen_client generate the client certificate update_server update...

Page 52: ...1 CAN mode on or off If CAN is switched on all the time source entries are accepted according to the set values of the MTC CAN module U6 5 The time sources can no longer be changed if CAN is switched...

Page 53: ...5 16 Manual time set Call menu 2 Configuration 2 Time handling 5 Manual time adjustment 1 Set UTC time in the format YY MM DD hh mm ss Time is set with ENTER 2 Correct time in ms backwards Range 10 0...

Page 54: ...larms Under alarms settings can be undertaken for the following functions Alarm relays see chapter 6 5 18 E Mail see chapter 6 5 20 SNMP Traps see chapter 6 5 21 6 5 18 Alarm relays 1 Alarm mask for r...

Page 55: ...modifications will be saved or restored one menu level higher in ALARM CONFIGURATION All Alarms with Error bitxx are not yet used A description of individual errors can be found in Appendix C Alarm li...

Page 56: ...g an address will delete the entry 4 Mail server port often 25 5 6 Destination e mail address ENTER without entering an address will delete the entry 7 Reply address e g support administrator ENTER wi...

Page 57: ...n 1 auto tries CRAM MD5 LOGIN PLAIN in this sequence 2 PLAIN 3 LOGIN 4 CRAM MD5 12 User name only for authentication mode 1 4 13 Password only for authentication mode 1 4 Press ENTER to change to page...

Page 58: ...figuration of the receiving system trap sink 1 5 Configuration of the receiving system trap sink 2 6 Time period for alive messages in seconds 0 no alive traps are sent Range 1 7 200sec Important Gene...

Page 59: ...1 Address of the evaluation system e g 10 241 0 15 ENTER without entering an address will delete the entry 2 Port of the evaluation system usually 162 3 SNMP Version 1 SNMP V1 2 SNMP V2c Important Ea...

Page 60: ...ttings 1 Setting the display language 2 Setting the time zone for the display and also all alarm logs e mail and SNMP See chapter 6 5 28 Time zone selection 3 Enter password for the menu user dts max...

Page 61: ...g test org 5 Set network interface Auto 100 10Mbit half full duplex View of the current network state in Menu 1 Status 6 Info network config Important The menu is closed upon modifying the IP or the D...

Page 62: ...llowing fields are not available in case of DHCP on A DHCP renew can also be triggered via this point Important DHCP on if no DHCP server is available leads to longer start up time 75 sec of the DTS 4...

Page 63: ...BATIME 63 120 800652 11 Network configuration IPv6 1 Autoconf on or off 2 DHCPv6 on or off 3 IP address with prefix in IPv6 format e g 2001 2345 6789 12 1 34 64 4 Gateway in IPv6 format 5 IPv6 DNS ser...

Page 64: ...MOBATIME 64 120 800652 11 6 5 24 Services network services FTP telnet SSH Network services configuration 1 3 Switch the individual services off or on...

Page 65: ...er must be configured See also chapter 6 5 21 SNMP Traps 2 Alarm mask for SNMP status see chapter 6 5 19 Alarm mask The modifications will be saved or restored one menu level higher in SNMP CONFIGURAT...

Page 66: ...V2c 1 Community string for read only Group membership for GET Standard romobatime 2 Community string for read write Group membership for GET PUT Standard rwmobatime Important Each configuration change...

Page 67: ...uration change leads to a restart of the SNMP DTS Agent User configuration SNMP V3 1 Password for authentication MD5 and privacy DES 8 40 characters 2 Minimal security level 0 noauth no authentication...

Page 68: ...iewDTS1 4 user defined 2 viewDTS2 Important Each configuration change leads to a restart of the SNMP DTS Agent Access configuration SNMP V3 1 3 Include View path form 1 3 6 1 4 1 13842 4 e g DTS or is...

Page 69: ...ones 100 over several pages The pages can be scrolled through with ENTER A time zone can be selected on the actual page by entering a time zone number Only one time zone is selected at any time Press...

Page 70: ...ve the entire configuration incl program and telegram files and the log files on a USB stick Also generates a diagnosis file dts480xsystem_xxxxxxxxxxxx log in the directory ram which is also copied on...

Page 71: ...scfg img Additionally the file dtscheck md5 must exist all file names are case sensitive Steps for updating images 1 Connect a FTP client software binary to the DTS 480x masterclock e g with Internet...

Page 72: ...ime Please wait is shown in the command line All images are copied The DTS 480x is automatically restarted on completion of the update The Telnet or SSH session has to be restarted Attention The updat...

Page 73: ...be verified after the update 7 5 Updating applications or configurations via USB To update individual files such as e g dts4801 dts4801menu ntpd dts4801mod ko dts4801 conf etc on the DTS 480x the fol...

Page 74: ...r ftp dts 10 241 0 5 ram Establish connection with IPv6 The address must be written in brackets e g with Internet Explorer enter ftp dts fd03 4432 4646 3454 2000 Attention The file has to be copied in...

Page 75: ...nts that are to be saved In case of doubt select everything 4 Click button Next 5 Indicate destination file by clicking the Browse button 6 Optionally enter a free backup comment E g reason for the ba...

Page 76: ...The copy procedure can be started on the DTS 480x by selecting the menu 3 Maintenance 8 Copy telegram and program files and press ENTER Afterwards select again in the menu 6 5 7 Serial telegrams and...

Page 77: ...individually allocated to a specific time zone External DCF Time Source UTC Master Clock DCF 77 Time Code output Switch Program Time Zone Entry C Operation Display Error report D A B Time Zone Entry...

Page 78: ...ing of the Stratum TO 1 16 the stratum will be counted upwards till it reaches 16 When the startum reaches the value Stratum limit for synchalarm the alarm Failure time source Str occures fix delay of...

Page 79: ...Stratum is increased as per set stratum timeout value till stratum of time source Fix stratum Stratum DTS 480x now keeps fix stratum 1 DCF GPS without NTP DCF ok Stratum DTS 480x always 1 Time always...

Page 80: ...checked for 1 hour before the time of the possible leap second DCF or NTP for any possible notification If notification is recognized it will be passed on via NTP and DCF output and the leap second a...

Page 81: ...f the ntp conf file can be accessed via the corresponding man page or consulted at http www eecis udel edu mills ntp html authopt html The authentication mode is automatically activated when a key is...

Page 82: ...ys and public keys enables all NTP clients to check the validity of the time information which they receive from servers in their own autokey group NTP Autokey is relatively complex in its use and stu...

Page 83: ...MD5 and encoding encryption DES The following MIB definitions are used SNMPv2 SMI SNMPv2 MIB SNMPv2 CONF SNMPv2 TC SNMPv2 TM SNMP FRAMEWORK MIB SNMP MPD MIB SNMP NOTIFICATION MIB SNMP TARGET MIB SNMP...

Page 84: ...om the menu descriptions of this manual Example Management System DTS Put dts480xFTPMode 1 Variable is set to 1 internally Put dts480xNetServicesConfigCmd 1 Configuration group is assumed Sends dts480...

Page 85: ...d Type Size Description dts480xSysConfigChangedTime TimeTicks 4 Bytes dts480xSystem dts480xNetConfigChangedTime TimeTicks 4 Bytes dts480xNetwork dts480xNetServicesConfigChangedTime TimeTicks 4 Bytes d...

Page 86: ...dts480xTSLocalFixStratum dts480xTSLocalCorrection dts480xTSLocalStratumTimeou dts480xTSOffsetSynchOnly dts480xTSErrorStratum dts480xTSLeapSecMode dts480xTSLeapSecDate dts480xTSCanMode dts480xTimeNTPS...

Page 87: ...erialMode dts480xOutLineSerialTimezone dts480xOutLineSerialComMode dts480xOutLineSerialComParam dts480xOutLineSerialTeleFile dts480xOutLineRS485Mode dts480xOutLineRS485Devices dts480xOutLineRS485DevNa...

Page 88: ...nity dts480xSnmpRWCommunity dts480xSnmpTrapMode dts480xSnmpTrapAlarmMask dts480xSnmpTrapCommunity dts480xSnmpTrapListenerIPAddress1 dts480xSnmpTrapListenerPort1 dts480xSnmpTrapVersion1 dts480xSnmpTrap...

Page 89: ...FFFFFFFF 5 Byte 2 Byte 1 Byte 9 3 6 Alarm Notification dts480xAlarm Sent out if alarm status changes i e Notification is sent out when an alarm flag is set or deleted This Notification is always sent...

Page 90: ...Up to 1000 lines can be programmed in this way This is the total sum of the lines in the week and channel programs Line 1 Line 2 Line 3 Time of day Switching function Weekday Line of a week program St...

Page 91: ...e via MOBALine 0 10sec If the control input AND or OR is linked to the switch program the status of the input is transferred to the next but one minute The switch inputs have priority as opposed to th...

Page 92: ...Buchse 1 SUB D 9 1 and Buchse 2 SUB D 9 2 SUB D 9 1 SUB D 9 2 Receive Data 2 3 Transmit Data Transmit Data 3 2 Receive Data Data Terminal Ready 4 1 6 Data Set Ready Carrier Detect System Ground 5 5 Sy...

Page 93: ...B Output for RS 485 slave clock line serial telegrams 8 Common Alarm inputs 18 36VDC max 6mA current consumption close contact Contact closed no alarm Length of connection max 30m 9 Alarm input 1 10...

Page 94: ...current consumption close contact Contact closed no alarm Length of connection max 30m 9 Alarm input 1 10 Common 11 Alarm input 2 12 Common 13 Alarm input 3 14 Common 15 Alarm input 4 16 DCF input DCF...

Page 95: ...10 A Rated voltage EN 250 V Rated surge voltage 2 5 kV Nominal current 10 A Strip length 7 mm 0 28 in Pulled out spring terminal with operation tool 2 operation tools are delivered with the accessory...

Page 96: ...oria Harare 2 No 06 Amman 2 Yes Last Thu Mar 23 59 Last Fri Oct 01 00 07 UTC GMT 0 No 08 Kuwait City Minsk Kaliningrad 3 No 09 Praia Cape Verde 1 No 10 UTC GMT 0 No 11 Abu Dhabi Muscat Tbilisi Moscow...

Page 97: ...52 UTC GMT 0 No 53 UTC GMT 0 No 54 Scoresbysund Greenland 1 Yes Last Sun Mar 00 00 Last Sun Oct 01 00 55 Nuuk Greenland 3 Yes Last Sat Mar 22 00 Last Sat Oct 23 00 56 Qaanaaq Greenland 4 Yes 2 nd Sun...

Page 98: ...r table can be changed with MOBA NMS or any other Moser Baer AG software such as e g ETCW If not changed using MOBA NMS it must be updated in accordance with the update instructions chapter 7 3 Updati...

Page 99: ...cters or the file type is TEL Tel or tel or syntax error in telegram file 14 Swtich program file invalid Check switch program file The file name has more than 8 characters or the file type is not PRG...

Page 100: ...and trap configuration 26 Error bit26 Not used 27 Error bit27 Not used 28 Linie 2 current too high Check MOBALine Impulse line DCF active line Alarm disappears only if alarm is removed Only active wit...

Page 101: ...ock is not or no longer reachable via network Check network settings in menu 2 Configuration 5 Network only possible with serial connection IP Address Subnet mask and Gateway must be set correctly Int...

Page 102: ...Telegram is transmitted on request The request strings can be defined The following requests are possible stop output output telegram at once singly output telegram at the next second singly output ev...

Page 103: ...600 Bit s 8 data bits none 1 stop bit the telegram has 20 characters Transmission time for the entire telegram 20 x 1 04 ms 20 8 ms Name of the telegram file The telegram file name is limited to 8 cha...

Page 104: ...es received e g variable value d 40 40 n 2 040 n 3 X ascii hex e g variable value d 40 28 c char binary e g variable value d 40 h 28 s string always up to comma see text tables e g string Jan Jan b he...

Page 105: ...tput CS a hh hour 00 23 mm minute 00 59 ss second 00 59 e g the periodic time output should start at 06 00 00 in each case SO 06 00 00 Interval automatic telegram output TI p hh mm ss Interval from se...

Page 106: ...rs must conform with l or ll Wildcards can be set with the sign This serves as wildcard for any character Characters can also be outputted in AsciiHex format e g xFE d h FE h FE is inserted d h is ins...

Page 107: ...s AM am pm 1 Entry AM PM flag 0 d h 00 00 11 59 2 Entry AM PM flag 1 d h 12 00 23 59 Text table synchronization alarm 2 entries SY ok alarm 1 Entry synchronization ok 2 Entry synchronization s failure...

Page 108: ...rt No 203495 Output code format With DIP switch 1 to 4 MODE is configurable Code 1 2 3 4 Code definition according to data sheet DCF FSK on on on on 112 071 IRIG B Standard off on on on 112 072 IRIG B...

Page 109: ...LICENSE OpenSSH SFTP server 5 2 p1 BSD LICENCE dropbear SSH server 0 52 MIT style Free party BSD LICENSE wide dhcpv6 DHCPv6 client 20080615 Free COPYRIGHT flex Flex Lib 2 5 4e BSD adapted COPYING zli...

Page 110: ...85 A RS485 B GND DCF in Ethernet 10 100Mbit USB Host 230VAC 24 VDC in Low voltage detection power 24 VDC out Ulogic alarm Alarm 1 in Alarm 2 in Alarm 3 in Alarm 4 in DCF in sync RTC IF 488 optional IR...

Page 111: ...sec day 1ppm measured over 24 h at 20 C 5 C During power break based on internal RTC 5 ppm but with jitter of 15 ms measured over 24 h at 20 C 5 C After a power failure the RTC time is available durin...

Page 112: ...DTS 4801 Max time deviation against internal time 10 ms jitter 10 ms 300 38400 Bauds 7 or 8 Data bits Parity no even odd Stop bit 1 or 2 no flow control cable length max 3 m The description of the tel...

Page 113: ...03495 Impedance 600 Voltage Amplitude 2 Vp p Max time deviation against internal time 15 ms jitter 10 ms RS 485 line output Only DTS 4801 Alternatively to serial telegrams Number of monitored clocks m...

Page 114: ...ntrol Key 51 Copyright 109 Correcting time manually 52 CRAM MD5 57 D Data bit 18 34 Daylight Saving Time 97 DAYTIME 80 112 DC power supply 93 94 113 DCF active 31 32 DCF input 93 94 DCF Ouput 33 DCF r...

Page 115: ...89 SNMP alive notification 89 SNMP notification 84 SNMP variables 86 SNMP access configuration 68 SNMP configuration 58 65 SNMP operation 84 SNMP traps 58 84 SNMP user configuration 67 SNTP 80 112 Sof...

Page 116: ...MOBATIME 116 120 800652 11 K Connection Table to be filled in Line Type Designation Example Line Type Designation MBL MBL Slave clock line main building west 1st floor...

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