hopf 6844, 6844RC Technical Manual

Valid for System 6844(RC) with FIRMWARE

Version: 02.xx

Industriefunkuhren

_____________________________________________________________

Technical Manual

System 6844 and 6844RC

(GPS and Sub-Master)

For Housing Versions

1U / 3U / Table / Wall

ENGLISH

Version: 02.02 - 02.02.2011

_____________________________________________________________

2 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

INPORTANT NOTES

Operational Reliability

Disregard may cause damages to persons or material.

Functionality

Disregard may impact function of system/device.

Information

Notes and Information.

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 In­ternet.

Homepage: http://www.hopf.com
E-mail: [e-mail]

Symbols and Characters

System 6844(RC) - V02.02 3 / 155

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

SERVICE RELIABILITY

Safety regulations

The safety regulations and observance of the technical data serve to en­sure 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 dam­age.

Safety of the device

This device has been manufactured in accordance with the latest techno­logical 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 posi­tion 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 accord­ingly.

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 "Elec­tromagnetic compatibility" and 2006/95/EG "Low voltage equipment".

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.

4 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

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

TABLE OF CONTENTS

Contents Page

1 Description 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

2 System 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

3 Installation ................................................................................................................... 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

3.2.2 Earthing .............................................................................................................................. 35

System 6844(RC) - V02.02 5 / 155

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

TABLE OF CONTENTS

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

4 Commissioning ........................................................................................................... 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

5 System 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

5.3.2 ERROR-Byte ...................................................................................................................... 62

6 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

TABLE OF CONTENTS

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

6 COM0 / 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

6.2 Data String Transmission Points of Time ................................................................. 89

System 6844(RC) - V02.02 7 / 155

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

TABLE OF CONTENTS

6.3 Data Strings............................................................................................................. 90

6.3.1 General Information about Data Output of Board 6844(RC) ............................................. 90

6.3.2

6.3.3

6.3.4

6.3.5 SINEC H1 ........................................................................................................................... 98

6.3.6 T-String ............................................................................................................................ 100

6.3.7 IBM Sysplex Timer Model 1+2 ......................................................................................... 101

6.3.8 Data String ALOHA .......................................................................................................... 103

6.3.9 SINEC H1 Extended ........................................................................................................ 104

6.3.10 NMEA 0183 - GPRMC (V3.00) ........................................................................................ 106

6.3.11 SAT 1703 Time String ...................................................................................................... 111

6.3.12 NMEA 0183 - GPZDA (V3.00) ......................................................................................... 113

6.3.13 GPS2000 Data String....................................................................................................... 116

6.3.14 IEC-103 (ASDU Type 6) .................................................................................................. 118

8 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

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

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

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

6.3.5.1 Specified Settings ....................................................................................................................... 98

6.3.5.2 Structure ..................................................................................................................................... 98

6.3.5.3 Status ......................................................................................................................................... 99

6.3.5.4 Example ...................................................................................................................................... 99

6.3.6.1 Specified Settings ..................................................................................................................... 100

6.3.6.2 Structure ................................................................................................................................... 100

6.3.6.3 Status ....................................................................................................................................... 100

6.3.6.4 Example .................................................................................................................................... 100

6.3.7.1 Specified Settings ..................................................................................................................... 101

6.3.7.2 Structure ................................................................................................................................... 101

6.3.7.3 Status ....................................................................................................................................... 102

6.3.7.4 Example .................................................................................................................................... 102

6.3.8.1 Specified Settings ..................................................................................................................... 103

6.3.8.2 Structure ................................................................................................................................... 103

6.3.8.3 Status ....................................................................................................................................... 103

6.3.8.4 Example .................................................................................................................................... 103

6.3.9.1 Specified Settings ..................................................................................................................... 104

6.3.9.2 Structure ................................................................................................................................... 104

6.3.9.3 Status ....................................................................................................................................... 105

6.3.9.4 Example .................................................................................................................................... 105

6.3.10.1 Specified Settings ..................................................................................................................... 107

6.3.10.2 Structure (GPS / Sub-Master) ................................................................................................... 107

6.3.10.3 Status ....................................................................................................................................... 110

6.3.10.4 Example .................................................................................................................................... 110

6.3.11.1 Specified Settings ..................................................................................................................... 111

6.3.11.2 Structure ................................................................................................................................... 111

6.3.11.3 Status ....................................................................................................................................... 112

6.3.11.4 Example .................................................................................................................................... 112

6.3.12.1 Specified Settings ..................................................................................................................... 113

6.3.12.2 Structure ................................................................................................................................... 114

6.3.12.3 Status ....................................................................................................................................... 114

6.3.12.4 Example .................................................................................................................................... 115

6.3.13.1 Specified Settings ..................................................................................................................... 116

6.3.13.2 Structure ................................................................................................................................... 116

6.3.13.3 Status ....................................................................................................................................... 117

6.3.13.4 Example .................................................................................................................................... 117

TABLE OF CONTENTS

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

7 6844RC - Functionality ............................................................................................. 124

7.1 RC-Pulses IMP 1-4 and RC-Output 1-4 ................................ ................................. 125

7.1.1 RC-Pulses IMP 1-4 - Operating ....................................................................................... 127

7.1.2 RC-Pulses IMP 1-4 - Time Status .................................................................................... 127

7.1.3 RC-Pulses IMP 1-4 - Cyclical Pulse ................................................................................. 127

7.1.4 RC-Pulses IMP 1-4 - Daily Pulse ..................................................................................... 128

7.1.5 RC-Pulses IMP 1-4 - Single Pulse ................................................................................... 128

7.1.6 RC-Pulse IMP 1-4 - One Time / Variable Pulse per Weekday ........................................ 130

7.2 LAN Management Board 6844MNG for 3U / Table / Wall Systems ....................... 131

7.3 LAN Management Module 6844MNG for 1U System ............................................. 131

8 Function Boards ....................................................................................................... 132

8.1 Function Boards for System-Bus ........................................................................... 133

8.2 Function Boards .................................................................................................... 133

8.3 Function Boards Summary .................................................................................... 133

8.4 Exchanging a Function Board ................................................................................ 134

8.5 Installation of an Additional Function Board ........................................................... 135

8.6 Removing Function Boards ................................................................................... 135

9 System Indicators / Fault Analysis / Troubleshooting ........................................... 136

9.1 Status and Fault Indicators .................................................................................... 136

9.1.1 Status LEDs ..................................................................................................................... 136

9.1.1.1 "Power" LED (1U Systems only) ............................................................................................... 136

9.1.1.2 "Sync. Status" LEDs (1U Systems only) ................................................................................... 136

9.1.1.3 LED Power Supply Unit (not for 1U) ......................................................................................... 136

9.1.2 LCD-Display ..................................................................................................................... 136

9.1.2.1 System Status on the Display ................................................................................................... 136

9.1.2.2 Number of Satellites (GPS only) ............................................................................................... 136

9.1.2.3 Position Display (GPS only) ...................................................................................................... 137

9.1.2.4 SyncOFF Timer ........................................................................................................................ 137

9.1.2.5 Display of ERROR-Byte ............................................................................................................ 137

9.1.2.6 Settings of the Synchronisation Mode ...................................................................................... 137

9.1.3 Error Relays (1U Systems only - Optional for 3U / Table-Top / Wall) ............................. 137

9.1.3.1 "Power" Relay ........................................................................................................................... 137

9.1.3.2 "Sync" Relay ............................................................................................................................. 137

9.1.4 Send LED ......................................................................................................................... 138

9.1.5 Auto-Reset Logic (System-Bus) ....................................................................................... 138

9.1.6 Serial Output of Data Telegrams ..................................................................................... 139

9.1.7 RC-Functionality (6844RC Systems only) ....................................................................... 139

9.2 Error Patterns ........................................................................................................ 139

9.2.1 Complete Failure .............................................................................................................. 139

9.2.2 "Power" / Power Supply LED "ON" - No Display and No Output ..................................... 140

9.2.3 Power LED "ON" - No Display but Valid Signal Output ................................................... 140

9.2.4 Power LED "ON" - Cyclical Flickering of the Displays ..................................................... 140

System 6844(RC) - V02.02 9 / 155

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

TABLE OF CONTENTS

9.2.5 No GPS Reception / No Synchronization ........................................................................ 140

9.2.6 No DCF77 Antenna Simulation (77.5kHz) / DCF77 Pulse (1Hz) ..................................... 142

9.2.7 No or Incorrect Serial Output ........................................................................................... 142

9.2.8 Incorrect Time Output ...................................................................................................... 142

9.2.9 No Daylight Saving Time (DST) Changeover .................................................................. 143

9.2.10 Output and Function Errors of individual Function Boards .............................................. 143

9.3 Support from the

hopf

Company .......................................................................... 143

10 Maintenance / Care ................................................................................................... 144

10.1 General Guidelines for Cleaning ............................................................................ 144

10.2 Cleaning the Housing ............................................................................................ 144

10.3 Cleaning the Display and Keypad .......................................................................... 144

11 Technical Data .......................................................................................................... 145

11.1 Specific Technical Data for 3U / Table-Top / Wall .................................................. 145

11.2 Specific Technical Data for 1U .............................................................................. 146

11.3 General Technical Data 6844(RC) ......................................................................... 147

11.3.1 Internal System Accuracy ................................................................................................ 148

11.3.2 Signal Outputs .................................................................................................................. 149

12 Appendix ................................................................................................................... 151

12.1 Factory-Default Values .......................................................................................... 151

12.2 GPS (Global Positioning System) .......................................................................... 152

12.3 DCF77 (German Long-Wave Transmitter Frankfurt 77.5kHz) ................................ 153

12.3.1 DCF77 General ................................................................................................................ 153

12.3.1.1 DCF77 Signal Structure ............................................................................................................ 153

12.3.1.2 Advantages and Disadvantages DCF77 ................................................................................... 155

12.3.2 DCF77 Generation by

12.3.2.1 DCF77 Signal Simulation .......................................................................................................... 155

12.3.2.2 DCF77 Pulse (1Hz) ................................................................................................................... 155

hopf

Clocks................................................................................. 155

10 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

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,
velopment of

hopf

Systems 6844 and 6844RC.

hopf

GPS System 6842 served as the basis for the further de-

In designing the Systems, particular attention was paid to their potential for universal applica­tion 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 Sub­Master (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 va­riety 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 al­so 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.

System 6844(RC) - V02.02 11 / 155

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

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.

12 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

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.

1.1 Difference between Systems 6844 and 6844RC

Both Systems are identical in their basic function and are based on the same hardware plat­form. However, System 6844RC also has more features and options.

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

In the 6844RC version, four additional high-precision, programmable internal pulses are
available, which can be configured exclusively via the

hopf

Management Console (

hmc

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 exclu­sively available for customer applications.

System 6844(RC) - V02.02 13 / 155

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

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 Man­agement 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 ventila­tion

Local on-site exchange of Control
Boards possible with display and key­pad

Local on-site exchange of power supply
unit possible

Local on-site exchange / installation of
Function Boards possible

Optional

DC power supplies (in­cluding voltage terminal
converted to DC)

24V DC

48V DC

110V DC

220V DC

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.

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 vari­ous housing options.

(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

14 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

(4) Second slot available by removing the serial interface

DESCRIPTION OF SYSTEM 6844 AND 6844RC

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:

o Synchronization signal reception and evaluation
o Keypad control
o Display control
o System-Bus control
o Time distribution in the system

 Two independent serial interfaces
 DCF77 antenna simulation (77.5kHz) via BNC connector
 System-Bus with two expansion slots

System 6844(RC) - V02.02 15 / 155

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

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:

16 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

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 instal­lation.

System 6844(RC) - V02.02 17 / 155

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

The lighting is activated by
pressing a key and switch­es off automatically after
approx. 4 minutes with no
action required on the key­pad.

Exceptions with regard to slot selection can be found in Chapter 8 Function
Boards.

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.

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.

18 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

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 condi­tions.

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:

o Synchronization signal reception and evaluation
o Keypad control
o Display control
o System-Bus control
o Time 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:

System 6844(RC) - V02.02 19 / 155

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

-

-

-

-

-

-

4

4

5

,

0

m

m

/

1

7

.

5

2

"

-

-

-

-

-

-

8

4

H

P

/

8

4

T

E

-

-

-

-

-

-

2

3

0

,

0

m

m

/

9

.

0

6

"

1U/

1HE

The lighting is activated by pressing a key and switches off automatically
after approx. 4 minutes with no action required on the keypad.

1.2.3.1 19 Inch Rack 1U/84HP

1.2.3.2 Display

The display consists of a two-line LCD-Display (Liquid Crystal Display) with 2x16 characters
and back-lighting.

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.

20 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

POWER

ON

Power

Power

(green)

ON The System is in operation
OFF The System is out of operation

(for example, it is switched off, defec­tive or the power supply has failed)

Front side

Rear side

SYNC. STATUS

ON OFF

S y n c .

Sync.

(red)

ON The system is not currently synchro-

nized by the installed Sync.-Source

respectively

Sync.

(green)

ON The system is currently synchronized

by the installed Sync.-Source or the
SyncOFF Timer is active

1.2.3.4 Status LEDs

The 1U System has status LEDs on both the front and rear sides. These allow the System
status to be recognized in the installed condition in the control panel, whilst operating via the
front panel as well as whilst checking the cabling on the rear side of the System.

The LEDs indicate the following System conditions:

1.2.3.5 System-Bus 6000

The System-Bus, consisting of the Bus Board with VG ledges, via which the Control Board
6844(RC) and the Function Boards are connected, can be found in the System 6844(RC).

The System-Bus serves to provide:

 Distribution of the time information.
 Communication between Control Board 6844(RC) and the Function Boards.
 Transmission of the regulated second pulse (PPS). This serves to synchronize the da-

ta output of the implemented Function Boards.

 Distribution of the regulated DCF77 pulse (generated by the Control Board 6844(RC)).
 Circular auto-reset circuit for ongoing verification of the System-Bus Function Boards

to be found in the System.

 Power supply for the installed boards.

Each active Function Board (transmit and receive) which is linked to the System-Bus has a
SEND LED. This LED signals which of the Function Boards is active on the System-Bus.

Function Boards which only receive data from the System-Bus do not have a SEND LED.

System 6844(RC) - V02.02 21 / 155

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

Exceptions of the slot selection can be found in Chapter 8 Function Boards

The ventilation apertures on the left and right hand sides must not be cov­ered. Otherwise, active ventilation is ineffective and inadequate convection
and/or thermal coupling with surrounding equipment may cause the tem-

perature to rise above the equipment’s maximum permissible operating

temperature.

1.2.3.6 Function Board Slots

Up to two Function Boards can be implemented in the System 6844(RC) 1U Slim Line.
As a basic principle, the slot can be freely selected for each 'Function Board' / 'System-Bus

Function Board'.

Only boards that have been adapted for the 1U Slim Line System can be used in these slots.
Slots that have been prepared for special functions are identified with the letters "A" and

"B".

1.2.3.7 Temperature-controlled Forced Ventilation

The clock system has two temperature-controlled fans to prevent the operating temperature
rising above the allowed limit as a result of thermal coupling with equipment mounted in the
control panel.

These fans are mounted on the side ventilation apertures and switch in when the tempera­ture in the equipment reaches approx. 45°C.

22 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

1.2.4 System Design 6844(RC) in ½ 19 inch Table Top Housing 3U/42HP

In essence, the System consists of the same components as the 3U System, except that the
arrangement is in accordance with the differing requirements of the housing option.

System front side / plug-in side:

System rear side:

System 6844(RC) - V02.02 23 / 155

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

1.2.4.1 ½ 19 Inch Table Top Housing 3U/42HP

1.2.5 System Design 6844(RC) in ½ 19 inch Wall Housing 3U/42HP

In essence, the System consists of the same components as the 3U System, except that the
arrangement is in accordance with the differing requirements of the housing option.

System front side:

24 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

1.2.5.1 ½ 19 Inch Wall Housing 3U/42HP

1.2.5.2 Slot for a Function Board

In System 6844(RC), due to the mechanics of the housing, only one Function Board can be
installed in the wall-mounting housing as standard.

System 6844(RC) - V02.02 25 / 155

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

DESCRIPTION OF SYSTEM 6844 AND 6844RC

1.3 Quick Install

 Earthing System / connect power supply
 Connection of the GPS Antenna System (GPS only)

and the appropriate synchronisation source for Sub-Master (Slave) Systems

 Switch on power supply
 Input local time and date
 Input difference time
 Input position (GPS only)
 Input changeover point of time S  D
 Input changeover point of time D  S
 Wait for minute change
 Trigger software reset
 Check for correct acquisition of the difference time using the SHOW function (GPS only)
 Check for correct acquisition of the position using the SHOW function
 Check for correct acquisition of the changeover point of time S  D using the

SHOW function

 Check for correct acquisition of the changeover point of time D  S using the

SHOW function

 Trigger hardware reset

The GPS version should be synchronous after less than 30 minutes, the Sub-Master (Slave)
version after less than 5 minutes.

This can be checked by means of the:

 LCD-Display
 System Status LEDs (1U version only)

26 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

SYSTEM 6844(RC) SYNCHRONIZATION

Master

Sub-Master (Slave)

Sync.Channel
Menu

GPS

Antenna Signal

Serial

Data string

Serial

Data string+

PPS

DCF77 pulse

CET / worldwide

1.01

TIME

o o o

o

o

1.02

TIME OFFSET

+ - -

-

+

1.03

CHANGEOVER TIME S  D
(Standard time  Daylight
saving time)

+ - -

-

-

1.04

CHANGEOVER TIME D  S
(Daylight saving time 
Standard time)

+ - -

-

-

1.31

SYSTEM-Byte /
Synchronizations-Mode
(Bit2 - Bit0)

000

001

010

011 / 100

2 System 6844(RC) Synchronization

This Chapter describes the various options for synchronizing System 6844(RC).
GPS System 6844(RS) is also referred to as "Master-System". This System variant provides

an internal GPS receiver.
Sub-Master (Slave) Systems are Systems 6844 (RC) that are synchronized by other Sys-

tems such as a Master System 6844 (RC). Depending on the synchronisation mode an addi­tional hardware is required to connect the synchronisation signal to System 6844 (RC).

2.1 Summary / Synchronization Source Settings

System synchronization options and their required settings:

+ Always required
(+) Only when necessary
o Not required - but possible

- Input not possible or no function

2.1.1 Synchronisation via GPS

GPS Clock Systems are synchronized by the time signal transmitted via the GPS satellites.
Therefore the Master System 6844 (RC) provides an internal GPS receiver. For the recep­tion of the GPS signal the installation of an appropriate GPS Antenna System is necessary.
Details about GPS functionality is described in Chapter 12.2 GPS (Global Positioning Sys-
tem).

The time basis received from GPS is based on UTC and does not contain any local time in­formation such as difference time and changeover times. These parameters need to be con­figured for evaluation of the local time in the System.

2.1.2 Synchronization via Serial Interface

On this setting, the
interface. This setting blocks the interface for other types of data communication (e.g. cycli-

cal time telegram output).

hopf_

Master/Slave string is transmitted to the clock via the COM1 serial

System 6844(RC) - V02.02 27 / 155

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

SYSTEM 6844(RC) SYNCHRONIZATION

Synchronization with the

hopf

Master/Slave string is only possible on

COM1. When synchronization via

hopf

Master/Slave string is set then the

serial parameters for COM1 are set automatically. All other settings of inter­face COM1 are ignored.

PPS input feed is not available on the standard version of this equipment
type. If such an input is required then this must be installed by

hopf

prior to

delivery. Retrofitting by the customer is not possible.

DCF77 pulse input feed is not available on the standard version of this
equipment type. If such an input is required then this must be installed by

hopf

prior to delivery. Retrofitting by the customer is not possible.

Functional Description for Synchronization via Serial Data String

A number of

hopf

radio-controlled clocks or systems can output the serial

hopf

Slave string. This string serves for the synchronization of Sub-Master (Slave) systems. It
contains all the necessary data from the transmitting clock system, such as hour, minute, se­cond, day, month, year and status information. For the accuracy of the System the control
character EXT (end of text) is transmitted on the second change.

The

hopf

Master/Slave data string can be transmitted every minute but also every second in
order to obtain a better accuracy of the System. The interface parameters for this synchroni­sation mode are firmly adjusted to 9600baud, 8 data bit, no parity an stop bit.

Control Board 6844(RC) evaluates the data received and, following checks for plausibility
and data verification, prepares the data for synchronization.

The highly precise setting of the internal time takes place with the start edge of the ETX,
transmitted exactly on the minute changeover, and the internal quartz base is also readjust­ed after several data strings have been received.

2.1.3 Synchronisation via Serial Interface with High-Accurate PPS

In this synchronisation mode System 6844 (RC) gets, in addition to the serial data string for
the time synchronisation, a PPS (Pulse per second) generated by the Master System. The
time information is adopted form the serial data string in the synchronisation mode "Syn­chronisation via serial interface". The additional PPS determines in this mode the internal
accuracy of the Sub-Master System.

Master/

This mode allows the synchronisation of the Sub-Master System with likely the same accu­racy as the Master System.

2.1.4 Synchronization via DCF77 Pulse - CET / WORLDWIDE

DCF77 time information is transmitted in digital form with the DCF77 pulse. As in the case of
DCF77 antenna simulation (77.5kHz), this signal can be generated by
and therefore can also be used for synchronization worldwide. In the case of the DCF77

pulse (1Hz), the parameters which require to be set by the customer are defined by the se­lected installation location.

For further information about the signals see Chapter 12.3.2.2 DCF77 Pulse (1Hz).

hopf

GPS equipment

28 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

SYSTEM 6844(RC) SYNCHRONIZATION

In this synchronization mode the UTC time is a calculated time which is
determined on the basis of the time offset and changeover points of time for
summer time and winter time.

Fixed time offset: Standard time (winter time)  UTC + 1h
Daylight saving time  UTC + 2h

Changeover point of time + current time status (summer or winter time)
are taken from the synchronization signal

Time offset: Standard time (winter time)  Set time offset
Daylight saving time  Set time offset +1h

Changeover point of time + current time status (daylight saving time or
standard time) are taken from the synchronization signal

The use of the DCF77 signal means that the system, in principle, is synchronized with local
time (standard time with ST/WT changeover, if required). Certain points must be noted in or­der for the system to transmit both local time and UTC time correctly.

The DCF77 Transmitter (location: Mainflingen, Frankfurt am Main / Germany) always trans­mits time information as local time (CET/CEST). This means that UTC time is calculated for
DCF77 systems. Two variables are now required in order to convert from local time to UTC
time:

o The time offset between UTC and the valid standard time (winter time) in the

respective time zone

o The changeover points of time between winter time and summer time – pro-

vided that such changeover takes place in the respective time zone

The signal received via the DCF77 antenna contains this required information for the CET
time zones (UTC+1h).

As a result, when configuring, it is necessary to differentiate between system operation in the
CET time zone and system operation as a slave or Sub-Master system for worldwide appli­cation.

2.1.4.1 Operation in the CET Time Zone (Europe)

If the system is configured for operation in the CET time zone, settings for time offset and
changeover points of time are not required or are ignored, since the time offset is fixed and
the DST changeover is controlled by information contained in the synchronization signal.

2.1.4.2 Operation in a different Time Zone (Worldwide)

If the system is configured for worldwide application, in order for UTC time output to be cor­rect, the time offset must be parameterized for the respective time zone. Settings for the
changeover points of time are not required, or are ignored, since the DST changeover is
controlled by the information contained in the synchronization signal.

System 6844(RC) - V02.02 29 / 155

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

INSTALLATION

The ventilation apertures on the top and bottom sides must not be
covered. Otherwise passive ventilation (convection) will not be effec­tive and lack of convection and / or thermal coupling with surrounding
equipment may give rise to an excessive equipment operating tem­perature.

At higher temperatures an active cooling / ventilation is recommended.

3 Installation

The following describes the installation of the System hardware.

3.1 System 6844(RC) in 3U / Table-Top / Wall - Housing

3.1.1 Installation of the 19 Inch 3U Rack

The System is assembled in a standard 3U/42HP or 3U/84HP 19" housing for control cabi­net installation (for dimensions see Chapter 1.2.2 System Design 6844(RC) in 19 inch
Rack 3U/42HP and 3U/84HP)

The following steps are to be carried out:

 Place the rack in the control panel and fix to the mounting brackets on the front side of

the rack using 4 screws.

 Ensure that there is sufficient space between the connection side of the rack and the

control panel to allow for the connection of cables to the System.

3.1.2 Installing the Table-Top Housing

30 / 155 System 6844(RC) - V02.02

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]