hopf Elektronik GmbH 6844 User manual

_____________________________________________________________
Technical Manual
System 6844 and 6844RC
(GPS and Sub-Master)
For Housing Versions
1U / 3U / Table / Wall
ENGLISH
Version: 03.00 - 17.12.2012
_____________________________________________________________
Valid for System 6844(RC) with FIRMWARE
Version: 03.xx
Industriefunkuhren

2 / 157 System 6844(RC) - V03.00
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: in[email protected]

INPORTANT NOTES
System 6844(RC) - V03.00 3 / 157
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: in[email protected]
Version number (Firmware / Manual)
THE FIRST TWO DIGITS OF THE VERSION NUMBER OF THE TECHNICAL MANUAL AND
THE FIRST TWO DIGITS OF THE FIRMWARE VERSION MUST COMPLY WITH
EACH OTHER.THEY INDICATE THE FUNCTIONAL CORRELATION BETWEEN DEVICE AND
TECHNICAL MANUAL.
THE DIGITS AFTER THE POINT IN THE VERSION NUMBER INDICATE CORRECTIONS IN
THE FIRMWARE /MANUAL THAT ARE OF NO SIGNIFICANCE FOR THE FUNCTION.
Downloading Technical Manuals
All current manuals of our products are available free of charge via our homepage on the In-
ternet.
Homepage: http://www.hopf.com
E-mail: [email protected]om
Symbols and Characters
Operational Reliability
Disregard may cause damages to persons or material.
Functionality
Disregard may impact function of system/device.
Information
Notes and Information.

SERVICE RELIABILITY
4 / 157 System 6844(RC) - V03.00
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: in[email protected]
Safety regulations
The safety regulations and observance of the technical data serve to en-
sure trouble-free operation of the device and protection of persons and
material. It is therefore of utmost importance to observe and compliance
with these regulations.
If these are not complied with, then no claims may be made under the
terms of the warranty. No liability will be assumed for any ensuing dam-
age.
Safety of the device
This device has been manufactured in accordance with the latest techno-
logical standards and approved safety regulations
The device should only be put into operation by trained and qualified staff.
Care must be taken that all cable connections are laid and fixed in posi-
tion correctly. The device should only be operated with the voltage supply
indicated on the identification label.
The device should only be operated by qualified staff or employees who
have received specific instruction.
If a device must be opened for repair, this should only be carried out by
employees with appropriate qualifications or by hopf Elektronik GmbH.
Before a device is opened or a fuse is changed all power supplies must
be disconnected.
If there are reasons to believe that the operational safety can no longer be
guaranteed the device must be taken out of service and labelled accord-
ingly.
The safety may be impaired when the device does not operate properly or
if it is obviously damaged.
CE-Conformity
This device fulfils the requirements of the EU directive 2004/108/EG "Elec-
tromagnetic compatibility" and 2006/95/EG "Low voltage equipment".
Therefore the device bears the CE identification marking
(CE = Communautés Européennes = European communities)
The CE indicates to the controlling bodies that the product complies with the
requirements of the EU directive - especially with regard to protection of health and safety for
the operator and the user - and may be released for sale within the common markets.

TABLE OF CONTENTS
System 6844(RC) - V03.00 5 / 157
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: in[email protected]
Contents Page
1Description of System 6844 and 6844RC..................................................................11
1.1 Difference between Systems 6844 and 6844RC .....................................................13
1.2 Structure of Housing Options...................................................................................14
1.2.1 Differences between the Housing Options ........................................................................ 14
1.2.2 System Design 6844(RC) in 19 inch Rack 3U/42HP and 3U/84HP.................................. 15
1.2.2.1 19 Inch Rack 3U/42HP and 3U/84HP......................................................................................... 17
1.2.2.2 Display and Keypad.................................................................................................................... 18
1.2.2.3 System-Bus 6000 ....................................................................................................................... 18
1.2.2.4 Slots for Function Boards............................................................................................................ 18
1.2.3 System Design 6844(RC) in 19 inch Rack 1U/84HP (Slim Line) ...................................... 19
1.2.3.1 19 Inch Rack 1U/84HP ............................................................................................................... 20
1.2.3.2 Display........................................................................................................................................ 20
1.2.3.3 Keypad........................................................................................................................................ 20
1.2.3.4 Status LEDs................................................................................................................................ 21
1.2.3.5 System-Bus 6000 ....................................................................................................................... 21
1.2.3.6 Function Board Slots .................................................................................................................. 22
1.2.3.7 Temperature-controlled Forced Ventilation................................................................................. 22
1.2.4 System Design 6844(RC) in ½ 19 inch Table Top Housing 3U/42HP .............................. 23
1.2.4.1 ½ 19 Inch Table Top Housing 3U/42HP..................................................................................... 24
1.2.5 System Design 6844(RC) in ½ 19 inch Wall Housing 3U/42HP........................................ 24
1.2.5.1 ½ 19 Inch Wall Housing 3U/42HP .............................................................................................. 25
1.2.5.2 Slot for a Function Board............................................................................................................ 25
1.3 Quick Install.............................................................................................................26
2System 6844(RC) Synchronization............................................................................27
2.1 Summary / Synchronization Source Settings...........................................................27
2.1.1 Synchronisation via GPS ................................................................................................... 27
2.1.2 Synchronization via Serial Interface................................................................................... 27
2.1.3 Synchronisation via Serial Interface with High-Accurate PPS........................................... 28
2.1.4 Synchronization via DCF77 Pulse - CET / WORLDWIDE................................................. 28
2.1.4.1 Operation in the CET Time Zone (Europe)................................................................................. 29
2.1.4.2 Operation in a different Time Zone (Worldwide)......................................................................... 29
3Installation...................................................................................................................30
3.1 System 6844(RC) in 3U / Table-Top / Wall - Housing..............................................30
3.1.1 Installation of the 19 Inch 3U Rack .................................................................................... 30
3.1.2 Installing the Table-Top Housing....................................................................................... 30
3.1.3 Mounting the Wall Housing................................................................................................ 31
3.1.4 Earthing.............................................................................................................................. 31
3.1.5 AC Power Supply............................................................................................................... 31
3.1.5.1 Safety and Warning Instructions................................................................................................. 31
3.1.5.2 Power Supply Unit Specifications ............................................................................................... 32
3.1.5.3 Fusing......................................................................................................................................... 32
3.1.6 DC Power Supply (Option)................................................................................................. 32
3.1.6.1 Power Supply Unit Specifications ............................................................................................... 33
3.1.6.2 Fusing......................................................................................................................................... 33
3.1.7 Synchronization Source Connection.................................................................................. 33
3.1.7.1 GPS Antenna Equipment............................................................................................................ 33
3.1.7.2 Serial String................................................................................................................................ 33
3.1.7.3 PPS (Pulse per second).............................................................................................................. 33
3.1.7.4 DCF77 Pulse .............................................................................................................................. 33
3.1.8 COM0 / COM1 Serial Interfaces Connection..................................................................... 34
3.1.9 DCF77 Antenna Simulation (77.5kHz) Connection ........................................................... 34
3.1.10 Function Boards Connection / Input- and Output Modules................................................ 34
3.2 System 6844(RC) in 1U Slim Line Housing .............................................................35
3.2.1 Installation of the 19 Inch Rack.......................................................................................... 35

TABLE OF CONTENTS
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3.2.2 Earthing.............................................................................................................................. 35
3.2.3 AC Power Supply............................................................................................................... 35
3.2.3.1 Safety and Warning Instructions................................................................................................. 36
3.2.3.2 Power Supply Unit Specifications ............................................................................................... 36
3.2.3.3 Fusing......................................................................................................................................... 36
3.2.4 DC Power Supply (Option)................................................................................................. 37
3.2.4.1 Power Supply Unit Specifications ............................................................................................... 37
3.2.4.2 Fusing......................................................................................................................................... 37
3.2.4.3 Reverse Voltage Protection........................................................................................................ 37
3.2.5 Synchronization Source Connection.................................................................................. 38
3.2.5.1 GPS Antenna Equipment............................................................................................................ 38
3.2.5.2 Serial String................................................................................................................................ 38
3.2.5.3 PPS (Pulse per second).............................................................................................................. 38
3.2.5.4 DCF77 Pulse .............................................................................................................................. 38
3.2.6 COM0 / COM1 Serial Interfaces Connection..................................................................... 39
3.2.7 Error Relays Connection.................................................................................................... 39
3.2.8 DCF77 Antenna Simulation (77.5kHz) Connection ........................................................... 39
3.2.9 Function Boards Connection / Input- and Output Modules................................................ 39
4Commissioning...........................................................................................................40
4.1 General Procedure..................................................................................................40
4.2 Switching on the Operating Power Supply...............................................................40
4.3 Display after System Start/Reset (Firmware)...........................................................41
4.3.1 Standard Display without Valid Time................................................................................. 41
4.3.2 Standard Display with Valid Time ...................................................................................... 41
4.3.3 Standard Display with Valid Time and Active ERROR-Byte.............................................. 42
4.4 Keypad Functions....................................................................................................43
4.4.1 Keypad Layout................................................................................................................... 43
4.4.2 Key Assignment................................................................................................................. 43
4.4.3 Keypad Inputs / Main Menu Activation............................................................................... 44
4.5 Initialization .............................................................................................................44
5System Parameterization and Operation...................................................................45
5.1 Menu Structure........................................................................................................45
5.2 SET Menu - Basic Settings System 6844(RC).........................................................47
5.2.1 Fail-safe Storage of Data Entries....................................................................................... 47
5.2.2 Input Time / Date................................................................................................................ 47
5.2.3 Input Local Time to UTC Time Offset (Time Zone)............................................................ 48
5.2.4 Input Daylight Saving Time (DST) Changeover................................................................. 49
5.2.5 Input Position (GPS only)................................................................................................... 50
5.2.6 Input SyncOFF Timer - Delayed Change of Sync.-Status................................................. 51
5.2.7 Serial Interface Parameters ............................................................................................... 52
5.2.7.1 Selection Frames for Parameters of Serial Interface COM0....................................................... 52
5.2.7.2 Selection Frames for Parameters of Serial Interface COM1....................................................... 53
5.2.8 LAN Board Parameters (Option)........................................................................................ 53
5.2.8.1 Selection Frames for LAN Board 1 Parameters.......................................................................... 53
5.2.8.2 Selection Frames for LAN Board 2 Parameters.......................................................................... 54
5.2.8.3 Selection Frame Parameters of the LAN Management Board/Module (System 6844RC only) . 54
5.2.9 Frequency Output (Option) ................................................................................................ 55
5.2.10 Status and Pulse Output.................................................................................................... 55
5.2.11 Selection of the Time Base for the LCD-Display ............................................................... 57
5.2.12 Selection of the Language for the Time Display on the LCD-Display................................ 57
5.2.13 SYSTEM-Byte.................................................................................................................... 58
5.2.13.1 Synchronization Mode (Sync.-Mode).......................................................................................... 58
5.2.14 Keyword Function for Keypad............................................................................................ 59
5.3 SHOW Menu - Display of the System 6844(RC) Base Settings...............................60
5.3.1 Satellite Values (GPS only)................................................................................................ 61

TABLE OF CONTENTS
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5.3.2 ERROR-Byte...................................................................................................................... 62
5.3.3 Position (GPS only)............................................................................................................ 66
5.3.4 Time Offset (Time Zone).................................................................................................... 66
5.3.5 Daylight Saving Time (DST) Changeover.......................................................................... 66
5.3.6 SyncOFF Timer - Delayed Change of Sync. Status .......................................................... 67
5.3.7 Serial Interface Parameters ............................................................................................... 68
5.3.7.1 Display Frames for the COM0 Serial Interface Parameters........................................................ 68
5.3.7.2 Display Frames for the COM1 Serial Interface Parameters........................................................ 68
5.3.8 LAN Board Parameters...................................................................................................... 69
5.3.8.1 Display Frames for LAN Board 1 Parameters............................................................................. 69
5.3.8.2 Display Frames for LAN Board 2 Parameters............................................................................. 69
5.3.8.3 Display Frames for LAN Management Board Parameters (System 6844RC only)..................... 70
5.3.9 Frequency Output (Option) ................................................................................................ 71
5.3.10 Status and Pulse Output.................................................................................................... 71
5.3.11 SYSTEM-Byte.................................................................................................................... 71
5.3.12 ADD.Outputs (Digital I/O)................................................................................................... 72
5.3.13 ADD.Inputs (Digital I/O) ..................................................................................................... 72
5.4 S.CLOCK Menu - Control of Slave Clocks with Function Board 7406......................73
5.5 INI Menu - System 6844(RC) Extended Settings/Functions.....................................73
5.5.1 Display the Firmware Version of Board 6844(RC)............................................................. 73
5.5.2 Display the PCID (Product Config ID) of Board 6844(RC) ................................................ 73
5.5.3 3D / Position-fix GPS Reception a. Synchronization Mode (GPS only) ............................ 74
5.5.4 DCF77 Pulse (1Hz) / DCF77 Antenna Simulation (77.5kHz) ............................................ 75
5.5.4.1 Signal DCF77.SYS / DCF77 Antenna Simulation (77.5kHz)....................................................... 75
5.5.4.1.1 Display and Set the DCF77.SYS Configuration 75
5.5.4.1.2 Display and Set DCF77.SYS TimeOFF 76
5.5.4.2 Signal DCF77.ADD (Option)....................................................................................................... 76
5.5.4.2.1 Display and Set DCF77.ADD Configuration 76
5.5.4.2.2 Display and Set DCF77.ADD TimeOFF 76
5.5.5 IRIG-B (Digital) Output....................................................................................................... 77
5.5.5.1 IRIG Time Code, Structure and Timing Diagram........................................................................ 77
5.5.5.1.1 IRIG-Bxxx Format Classes in accordance with IRIG Standard 200-04 78
5.5.5.1.2 IEEE1344-1995 78
5.5.5.1.3 AFNOR NFS 87-500 78
5.5.5.2 Display and Set IRIG-B.(1) Configuration................................................................................... 79
5.5.5.3 Display and Set IRIG-B.(1) TimeOFF......................................................................................... 79
5.5.5.4 IRIG-B.(2) Configuration/TimeOFF (Option)............................................................................... 80
5.5.6 Activate LAN Management Board (Board 6844RC only)................................................... 80
5.5.7 Trigger Reset / Default....................................................................................................... 81
5.5.7.1 Software-Reset (Control Board 6844(RC) only).......................................................................... 81
5.5.7.2 Hardware-Reset (Complete System).......................................................................................... 81
5.5.7.3 Trigger the GPS Receiver Default (GPS only)............................................................................ 81
5.5.7.4 Factory Default (Control Board 6844(RC) only).......................................................................... 81
6COM0 / COM1 Serial Interfaces..................................................................................82
6.1 Configuration of the Serial Interfaces / Pulse Output ...............................................82
6.1.1 Serial Transmission Parameters........................................................................................ 82
6.1.2 Configuration of the Data String (Mode Byte).................................................................... 84
6.1.2.1 Mode Byte 1 / Bit7 - Local Time or UTC in the Serial Output...................................................... 85
6.1.2.2 Mode Byte 1 / Bit 6 - Serial Output Second Forerun................................................................... 85
6.1.2.3 Mode Byte 1 / Bit 5 - Bit 5 currently no function.......................................................................... 85
6.1.2.4 Mode Byte 1 / Bit 4 - Last Control Character at Second Change (On-Time Mark)..................... 85
6.1.2.5 Mode Byte 1 / Bit 3 - Reverse Control Characters CR and LF.................................................... 85
6.1.2.6 Mode Byte 1 / Bit 2 - Delayed Transmission............................................................................... 85
6.1.2.7 Mode Byte 1 / Bit1-Bit0 - Data String Transmission Point of Time.............................................. 86
6.1.2.8 Mode Byte 2 / Bit7: Output Mode DATA STRING / PULSES...................................................... 86
6.1.2.9 Mode Byte 2 / Bit6-Bit0 - Data String Selection .......................................................................... 86
6.1.2.10 Mode Byte 2 / Bit6-Bit0: Pulse Selection .................................................................................... 87
6.1.2.11 Mode Byte 3 / Bit7-Bit0............................................................................................................... 88
6.1.3 Serial Data String Request ................................................................................................ 88
6.1.3.1 Serial Requests with ASCII Characters ( hopf Standard and hopf 2000) ............................... 88

TABLE OF CONTENTS
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6.2 Data String Transmission Points of Time.................................................................89
6.3 Data Strings.............................................................................................................90
6.3.1 General Information about Data Output of Board 6844(RC) ............................................. 90
6.3.2 hopf Standard String (6021)............................................................................................. 91
6.3.2.1 Specified Settings....................................................................................................................... 91
6.3.2.2 Structure..................................................................................................................................... 91
6.3.2.3 Status ......................................................................................................................................... 91
6.3.2.4 Example...................................................................................................................................... 92
6.3.3 hopf 2000 - 4 Digit Year Output........................................................................................ 93
6.3.3.1 Specified Settings....................................................................................................................... 93
6.3.3.2 Structure..................................................................................................................................... 93
6.3.3.3 Status ......................................................................................................................................... 94
6.3.3.4 Example...................................................................................................................................... 94
6.3.4 hopf Master/Slave-String.................................................................................................. 95
6.3.4.1 Specified Settings....................................................................................................................... 95
6.3.4.2 Structure..................................................................................................................................... 96
6.3.4.3 Status ......................................................................................................................................... 97
6.3.4.4 Example...................................................................................................................................... 97
6.3.5 SINEC H1........................................................................................................................... 98
6.3.5.1 Specified Settings....................................................................................................................... 98
6.3.5.2 Structure..................................................................................................................................... 98
6.3.5.3 Status ......................................................................................................................................... 99
6.3.5.4 Example...................................................................................................................................... 99
6.3.6 T-String ............................................................................................................................ 100
6.3.6.1 Specified Settings..................................................................................................................... 100
6.3.6.2 Structure................................................................................................................................... 100
6.3.6.3 Status ....................................................................................................................................... 100
6.3.6.4 Example.................................................................................................................................... 100
6.3.7 IBM Sysplex Timer Model 1+2......................................................................................... 101
6.3.7.1 Specified Settings..................................................................................................................... 101
6.3.7.2 Structure................................................................................................................................... 101
6.3.7.3 Status ....................................................................................................................................... 102
6.3.7.4 Example.................................................................................................................................... 102
6.3.8 Data String ALOHA.......................................................................................................... 103
6.3.8.1 Specified Settings..................................................................................................................... 103
6.3.8.2 Structure................................................................................................................................... 103
6.3.8.3 Status ....................................................................................................................................... 103
6.3.8.4 Example.................................................................................................................................... 103
6.3.9 SINEC H1 Extended ........................................................................................................ 104
6.3.9.1 Specified Settings..................................................................................................................... 104
6.3.9.2 Structure................................................................................................................................... 104
6.3.9.3 Status ....................................................................................................................................... 105
6.3.9.4 Example.................................................................................................................................... 105
6.3.10 NMEA 0183 - GPRMC (V3.00)........................................................................................ 106
6.3.10.1 Specified Settings..................................................................................................................... 107
6.3.10.2 Structure (GPS / Sub-Master)................................................................................................... 107
6.3.10.3 Status ....................................................................................................................................... 110
6.3.10.4 Example.................................................................................................................................... 110
6.3.11 SAT 1703 Time String...................................................................................................... 111
6.3.11.1 Specified Settings..................................................................................................................... 111
6.3.11.2 Structure................................................................................................................................... 111
6.3.11.3 Status ....................................................................................................................................... 112
6.3.11.4 Example.................................................................................................................................... 112
6.3.12 NMEA 0183 - GPZDA (V3.00)......................................................................................... 113
6.3.12.1 Specified Settings..................................................................................................................... 113
6.3.12.2 Structure................................................................................................................................... 114
6.3.12.3 Status ....................................................................................................................................... 114
6.3.12.4 Example.................................................................................................................................... 115
6.3.13 GPS2000 Data String....................................................................................................... 116
6.3.13.1 Specified Settings..................................................................................................................... 116
6.3.13.2 Structure................................................................................................................................... 116
6.3.13.3 Status ....................................................................................................................................... 117
6.3.13.4 Example.................................................................................................................................... 117

TABLE OF CONTENTS
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6.3.14 IEC-103 (ASDU Type 6) .................................................................................................. 118
6.3.14.1 Specified Settings..................................................................................................................... 118
6.3.14.2 Structure................................................................................................................................... 119
6.3.14.3 Example.................................................................................................................................... 119
6.3.14.4 Initialization String for IEC-103 (ASDU Type 6)........................................................................ 120
6.3.15 ABB-SPA Seconds-Clock ................................................................................................ 121
6.3.15.1 Specified Settings..................................................................................................................... 121
6.3.15.2 Structure................................................................................................................................... 122
6.3.15.2.1 Date and Time String 122
6.3.15.2.2 Second String 123
6.3.15.3 Status ....................................................................................................................................... 123
6.3.15.4 Examples.................................................................................................................................. 123
6.3.15.4.1 Date and Time String 123
6.3.15.4.2 Second String 123
6.3.16 SPT String........................................................................................................................ 124
6.3.16.1 Specified Settings..................................................................................................................... 124
6.3.16.2 Structure................................................................................................................................... 124
6.3.16.3 Status ....................................................................................................................................... 125
6.3.16.4 Example.................................................................................................................................... 125
76844RC - Functionality .............................................................................................126
7.1 RC-Pulses IMP 1-4 and RC-Output 1-4.................................................................127
7.1.1 RC-Pulses IMP 1-4 - Operating....................................................................................... 129
7.1.2 RC-Pulses IMP 1-4 - Time Status.................................................................................... 129
7.1.3 RC-Pulses IMP 1-4 - Cyclical Pulse................................................................................. 129
7.1.4 RC-Pulses IMP 1-4 - Daily Pulse..................................................................................... 130
7.1.5 RC-Pulses IMP 1-4 - Single Pulse................................................................................... 130
7.1.6 RC-Pulse IMP 1-4 - One Time / Variable Pulse per Weekday ........................................ 132
7.2 LAN Management Board 6844MNG for 3U / Table / Wall Systems .......................133
7.3 LAN Management Module 6844MNG for 1U System.............................................133
8Function Boards .......................................................................................................134
8.1 Function Boards for System-Bus...........................................................................135
8.2 Function Boards....................................................................................................135
8.3 Function Boards Summary....................................................................................135
8.4 Exchanging a Function Board................................................................................136
8.5 Installation of an Additional Function Board...........................................................137
8.6 Removing Function Boards ...................................................................................137
9System Indicators / Fault Analysis / Troubleshooting ...........................................138
9.1 Status and Fault Indicators....................................................................................138
9.1.1 Status LEDs..................................................................................................................... 138
9.1.1.1 "Power" LED (1U Systems only)............................................................................................... 138
9.1.1.2 "Sync. Status" LEDs (1U Systems only)................................................................................... 138
9.1.1.3 LED Power Supply Unit (not for 1U)......................................................................................... 138
9.1.2 LCD-Display..................................................................................................................... 138
9.1.2.1 System Status on the Display................................................................................................... 138
9.1.2.2 Number of Satellites (GPS only)............................................................................................... 138
9.1.2.3 Position Display (GPS only)...................................................................................................... 139
9.1.2.4 SyncOFF Timer ........................................................................................................................ 139
9.1.2.5 Display of ERROR-Byte............................................................................................................ 139
9.1.2.6 Settings of the Synchronisation Mode ...................................................................................... 139
9.1.3 Error Relays (1U Systems only - Optional for 3U / Table-Top / Wall) ............................. 139
9.1.3.1 "Power" Relay........................................................................................................................... 139
9.1.3.2 "Sync" Relay............................................................................................................................. 139
9.1.4 Send LED......................................................................................................................... 140
9.1.5 Auto-Reset Logic (System-Bus)....................................................................................... 140
9.1.6 Serial Output of Data Telegrams ..................................................................................... 141
9.1.7 RC-Functionality (6844RC Systems only) ....................................................................... 141

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9.2 Error Patterns........................................................................................................141
9.2.1 Complete Failure.............................................................................................................. 141
9.2.2 "Power" / Power Supply LED "ON" - No Display and No Output..................................... 142
9.2.3 Power LED "ON" - No Display but Valid Signal Output................................................... 142
9.2.4 Power LED "ON" - Cyclical Flickering of the Displays..................................................... 142
9.2.5 No GPS Reception / No Synchronization ........................................................................ 142
9.2.6 No DCF77 Antenna Simulation (77.5kHz) / DCF77 Pulse (1Hz)..................................... 144
9.2.7 No or Incorrect Serial Output ........................................................................................... 144
9.2.8 Incorrect Time Output ...................................................................................................... 144
9.2.9 No Daylight Saving Time (DST) Changeover.................................................................. 145
9.2.10 Output and Function Errors of individual Function Boards.............................................. 145
9.3 Support from the hopf Company..........................................................................145
10 Maintenance / Care...................................................................................................146
10.1 General Guidelines for Cleaning............................................................................146
10.2 Cleaning the Housing............................................................................................146
10.3 Cleaning the Display and Keypad..........................................................................146
11 Technical Data ..........................................................................................................147
11.1 Specific Technical Data for 3U / Table-Top / Wall..................................................147
11.2 Specific Technical Data for 1U ..............................................................................148
11.3 General Technical Data 6844(RC).........................................................................149
11.3.1 Internal System Accuracy................................................................................................ 150
11.3.2 Signal Outputs.................................................................................................................. 151
12 Appendix ...................................................................................................................153
12.1 Factory-Default Values..........................................................................................153
12.2 GPS (Global Positioning System)..........................................................................154
12.3 DCF77 (German Long-Wave Transmitter Frankfurt 77.5kHz)................................155
12.3.1 DCF77 General................................................................................................................ 155
12.3.1.1 DCF77 Signal Structure............................................................................................................ 155
12.3.1.2 Advantages and Disadvantages DCF77................................................................................... 157
12.3.2 DCF77 Generation by hopf Clocks................................................................................. 157
12.3.2.1 DCF77 Signal Simulation.......................................................................................................... 157
12.3.2.2 DCF77 Pulse (1Hz)................................................................................................................... 157

DESCRIPTION OF SYSTEM 6844 AND 6844RC
System 6844(RC) - V03.00 11 / 157
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: in[email protected]
1 Description of System 6844 and 6844RC
hopf Systems 6844 and 6844RC offer a broad range of functionality combined with ease of
integration and are suitable for the needs of modern industry and the current computer and
network environment in which these systems are used.
Tried and tested worldwide, hopf GPS System 6842 served as the basis for the further de-
velopment of hopf Systems 6844 and 6844RC.
In designing the Systems, particular attention was paid to their potential for universal applica-
tion combined with an optimal cost-benefit ratio for the different fields of use.
Furthermore, these Systems allow customized solutions to be created quickly and easily to
meet specific project requirements.
Synchronisation (GPS and Sub-Master)
The hopf_ Systems 6844 and 6844RC are available as GPS systems and also as Sub-
Master (Slave) Systems. A GPS System having GPS receiver can also be configured as a
Sub-Master (Slave) System.
Functionality
The functionality of the Systems ranges from the simple emission of serial strings or pulses
to the sophisticated NTP time server with LAN management and monitoring as well as a va-
riety of other complex applications.
A range of function boards are available for the respective applications which can be used to
meet almost all customer requirements - from a simple pulse output in the widest possible
variety of hardware applications to the highly accurate NTP time server.
Modularity
In their standard configurations, the Systems already offer appropriate modularity in terms of
the use of different function boards, housings, power supplies and subsequent expandability.
The Systems can also be supplied with additional expansion options. This makes it possible
to easily adapt the Systems in accordance with changing future requirements.
Housing Options
hopf Systems 6844 and 6844RC are available to the customer in a variety of housing op-
tions to permit their use in almost any application.
Maintenance free
Complete maintenance free (no additional service costs) and high equipment reliability result
in great flexibility and a high degree of availability.
Expansion
The System can be extended using Function Boards which can be added by the customer.
In this way, functionality can be easily upgraded on site at low cost. Function Boards can al-
so be exchanged directly on site. Direct account of the potential for subsequent local on-site
expansion by the customer can be taken at the system design stage.

DESCRIPTION OF SYSTEM 6844 AND 6844RC
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hopf Elektronik GmbH
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Customized System Structures
Based on the standard system, projects and special designs can be realized at low cost.
For this purpose, please consult the expert team at hopf Elektronik GmbH - now with the
almost 40 years of experience in the field of time synchronization - we will be pleased to
help.
Some of the System’s base functions:
Systems available as GPS and Sub-Master (Slave) Systems
GPS Systems also usable as Sub-Master (Slave) Systems
Synchronization is possible with only one satellite (GPS only)
Synchronisation of Sub-Master (Slave) Systems via different standard signals
Simple operation via keypad and LCD-display on the front panel
All cable connections on the rear side (19 inch rack 1U/3U only)
DC Power Supply (Option)
Housing with additional earth screw for cables up to 16mm²
Power input with mains switch (1U only) compliant with IEC/EN 60320-1/C14
and EMI line filter
Prepared for retrofitting of Function Boards by the customer
Up to two independent NTP time servers can be implemented on one System
Two independent serial interfaces (each in RS232 and RS422 format)
Output of a freely programmable digital IRIG-B pulse
High freewheel accuracy due to control of the internal quartz base
Potential isolation of the GPS antenna circuit (GPS only)
Completely maintenance-free System
SyncOFF timer (reception failure bypassing) for error message-free operation even in
difficult synchronisation conditions.
Redundant multiple synchronization signal verification for error-free and leap-free
signal evaluation
Maintenance-free buffered back-up clock for three days
Additional Functions of System 6844RC
All settings on Control Board 6844RC can be carried out via a serial remote inter-
face using the hmc Remote Software.
Internal output of 4 highly accurate, freely configurable signals / pulses.
With an optional LAN Management Board, all settings on the Control Board can
be performed and the System monitored via LAN.
Extension options
Customer-specific system adaptations for "tailor-made" project solutions.

DESCRIPTION OF SYSTEM 6844 AND 6844RC
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hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: in[email protected]
1.1 Difference between Systems 6844 and 6844RC
Both Systems are identical in their basic function and are based on the same hardware plat-
form. However, System 6844RC also has more features and options.
In this description, the notation 6844(RC) means that the statements refer
to both Systems.
Subsequent local on-site activation of RC functionality is not possible.
System 6844RC is designed for use in conjunction with management systems.
The System can be configured via serial interface and monitored in a network environment
by using a LAN Management Board / Module 6844MNG (SNMP/SYSLOG/e-mail notification)
and configured via the hopf Management Console ( hmc ).
In the 6844RC version, four additional high-precision, programmable internal pulses are
available, which can be configured exclusively via the hopf Management Console ( hmc ).
The serial connection is made via interface COM0. Optionally, a separate remote interface
can also be integrated into the System so that both interfaces COM0 and COM1 are exclu-
sively available for customer applications.

DESCRIPTION OF SYSTEM 6844 AND 6844RC
14 / 157 System 6844(RC) - V03.00
hopf Elektronik GmbH
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1.2 Structure of Housing Options
The following section describes the differences between the housing options.
1.2.1 Differences between the Housing Options
The following table provides a summary of the different functions and extensions of the vari-
ous housing options.
Description
3U
1U
TableTop
Wall
42HP
84HP
84HP
42HP
42HP
2 independent serial interfaces each
with RS232 and RS422 level
(1)
Slots for Function Boards (for Boards
with / without System-Bus)
2
2
2
2
1
(4)
Optional slot extensions for Function
Boards without System-Bus
2
11
(2)
Redundant power supply units (with /
without additional power feed)
optional
System status via LEDs / relays
optional
optional
optional
optional
LAN Management Board / Module
suitable for integration (6844RC only)
Optional slot prepared for LAN Man-
agement Board / separate remote
interface (6844RC only)
(3)
(3)
(3)
(3)
Standard voltage
115 /
230V AC
115 /
230V AC
100 -
240V AC
115 /
230V AC
115 /
230V AC
Temperature controlled forced ventila-
tion
Local on-site exchange of Control
Boards possible with display and key-
pad
Local on-site exchange of power supply
unit possible
Local on-site exchange / installation of
Function Boards possible
Optional
DC power supplies (in-
cluding voltage terminal
converted to DC)
24V DC
48V DC
110V DC
220V DC
(1) Alternative pin terminal design and pin assignment
(2) Standard power supply unit max. 40VA
(3) One optional expansion slot or the serial interface is lost
(4) Second slot available by removing the serial interface
It is not possible to freely combine all options and extensions.
For technical clarification of specific combinations of equipment features
and functions, please consult the expert team at hopf Elektronik GmbH –
we will be pleased to advise you.

DESCRIPTION OF SYSTEM 6844 AND 6844RC
System 6844(RC) - V03.00 15 / 157
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: in[email protected]
1.2.2 System Design 6844(RC) in 19 inch Rack 3U/42HP and 3U/84HP
As standard, the System is assembled in a standard ½ 19" rack (3U/42HP). Optionally, the
System is also available in a 1/1 19" rack (3U/84HP).
The base system consists of the following:
1/1 resp. ½ 19" module rack 3U
Supply voltage 115/230V AC –other voltages available
Voltage input with IEC/EN 60320-1/C14 connection and EMI line filter
Connection for protection earth (PE) cables up to 16mm²
System front panel with LCD-Display (2x16), keypad (25 keys)
Control Board 6844(RC) for:
oSynchronization signal reception and evaluation
oKeypad control
oDisplay control
oSystem-Bus control
oTime distribution in the system
Two independent serial interfaces
DCF77 antenna simulation (77.5kHz) via BNC connector
System-Bus with two expansion slots

DESCRIPTION OF SYSTEM 6844 AND 6844RC
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hopf Elektronik GmbH
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System front side 3U/42HP:
System rear side / plug-in side 3U/42HP:
System front side 3U/84HP:
System rear side / plug-in side 3U/84HP:

DESCRIPTION OF SYSTEM 6844 AND 6844RC
System 6844(RC) - V03.00 17 / 157
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: in[email protected]
1.2.2.1 19 Inch Rack 3U/42HP and 3U/84HP
As standard, the System is assembled in a standard ½ 19" housing (3U/42HP) for control
cabinet installation.
Optionally, the System is also available in a 1/1 19" rack (3U/84HP) for control cabinet instal-
lation.

DESCRIPTION OF SYSTEM 6844 AND 6844RC
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hopf Elektronik GmbH
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1.2.2.2 Display and Keypad
Display
The display consists of a two-line LCD-
Display (Liquid Crystal Display) with 2x16
characters and back-lighting.
The lighting is activated by
pressing a key and switch-
es off automatically after
approx. 4 minutes with no
action required on the key-
pad.
For a description of the display functions
please see Chapter 5 System Parameteri-
zation and Operation.
Keypad
The alphanumeric keypad with 25 keys pro-
vides menu-driven operation of the clock
system.
1.2.2.3 System-Bus 6000
System 6844(RC) contains the System-Bus which is made up of Bus Board with VG ledges,
by means of which Control Board 6844(RC) and the Function Boards are connected.
The System-Bus is used to:
Distribute time information.
Communicate between Control Board 6844(RC) and Function Boards.
Transmit the regulated second pulse (PPS). This serves to synchronize the data
output of the installed Function Boards.
Distribute the regulated DCF77 pulse (generated by Control Board 6844(RC)).
Continuous auto-reset circuit for ongoing monitoring of the System-Bus Function
Boards in the System.
Power supply to the installed Boards.
Each active (sending and receiving) Function Board built into the System-Bus has a SEND
LED. This LED indicates which Function Board is active on the System-Bus at the time.
Function Boards that only receive data from the System-Bus do not have a SEND LED.
1.2.2.4 Slots for Function Boards
In System 6844(RC), up to two Function Boards can be installed as standard. In principle,
the slot for each 'Function Board' / 'System-Bus Function Board' is freely selectable.
Exceptions with regard to slot selection can be found in Chapter 8 Function
Boards.

DESCRIPTION OF SYSTEM 6844 AND 6844RC
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hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: in[email protected]
1.2.3 System Design 6844(RC) in 19 inch Rack 1U/84HP (Slim Line)
The system can be individually configured for various applications due to its partly modular
design and can be easily upgraded or converted to suit changes in the application condi-
tions.
The base system consists of the following:
1/1 19" module rack 1U/84HP (Slim Line)
Wide-ranging power supply unit from 100-240V AC / 40VA (47-63Hz)
Other input voltages available
Voltage feed with power switch with connections in accordance with
IEC/EN60320/C14 including EMI line filter
Connection for protection earth (PE) cables up to 16mm²
System front panel with LCD-Display (2x16), keypad (20 keys) and status LEDs
System front panel:
Control Board 6844(RC) for:
oSynchronization signal reception and evaluation
oKeypad control
oDisplay control
oSystem-Bus control
oTime distribution in the system
Two independent serial interfaces
DCF77 antenna simulation (77.5kHz) via BNC connector
(not available with installed LAN management module)
System-Bus with two expansion slots
System rear side / plug-in side:

DESCRIPTION OF SYSTEM 6844 AND 6844RC
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1.2.3.1 19 Inch Rack 1U/84HP
------
445,0mm/17.52"
------
84HP/84TE
------
230,0mm/9.06"
1U/
1HE
1.2.3.2 Display
The display consists of a two-line LCD-Display (Liquid Crystal Display) with 2x16 characters
and back-lighting.
The lighting is activated by pressing a key and switches off automatically
after approx. 4 minutes with no action required on the keypad.
For a description of the display functions please see Chapter 5 System Parameterization
and Operation.
1.2.3.3 Keypad
The alphanumeric keypad with 20 keys provides menu-driven operation of the clock system.