MOBATIME GNSS 4500 Satellite Time Signal Receiver Instruction Manual
- August 7, 2024
- MOBATIME
Table of Contents
MOBATIME GNSS 4500 Satellite Time Signal Receiver
Description
The time signal receiver GNSS 4500 receives and processes the signals of up to three global navigation satellite systems (GNSS). With this precise time sources as a reference, it is designed to synchronize master clocks and time servers. For this purpose, it sends out a serial time signal (DCF coded, UTC or CET) over a current loop interface.
Functions
- Supports the satellite systems GPS, GLONASS, Galileo and BeiDou
- Multi GNSS configurations available for increased stability and Security
- Tracks the signals of up to 72 satellites
- Current loop interface, electrically isolated, for DCF time code output (UTC or CET). Leading edge is synchronous to the 1PPS (second impulse) from the GNSS module
- Automatic stop of the signal output during insufficient reception
- Selection of time code signal UTC or CET via polarity reversal of the supply connectors
- Status display via LEDs (visible from cable side)
- Input voltage 12 – 36 VDC +/-10%, < 0.4W
- Simple mounting: direct connection to end devices via UV resistant 4-wire cable for power supply and time code signal.
- Housing: IP 65, UV resistant, L 85 x W 80 x H 86 mm
Ordering Information
| Cable Length| Used Navigation Systems
---|---|---
Product Name| 10m| 100m| GPS| Galileo| GLONASS|
Bei Dou
GNSS 4500 GPS| 129768| 129772| •| | |
GNSS 4500 GPS_Galileo| 129769| 129773| •| •| |
GNSS 4500 GPS_Glonass| 129770| 129774| •| | •|
GNSS 4500 GPS_Beidou| 129771| 129775| •| | | •
GNSS 4500 Galileo| 130126| 130128| | •| |
GNSS 4500 Badious| –| 135018| | | | •
Housing / Dimensions
Technical data
| GNSS 4500
---|---
Reception properties| System| Frequency| Sensitivity
GPS| L1 C/A| -166 dBm
GLONASS| L10F| -166 dBm
GLONASS| B1I| -166 dBm
GLONASS| E1B/C| Galileo E1B/C -159 dBm
Interfaces /connections| 1 x Current loop| DCF| Current loop passive
interface (Open Collector) leading edge synchronous to 1PPS of the GPS module
electrically isolated (optocoupler)
Connection allocation| white| DCF+| optocoupler output (isolated)
brown| DCF-| optocoupler output (isolated)
yellow| Time code output UTC| Time code output CE
V+ (12 – 36 VDC)| V- (GND)
green| V- (GND)| V+ (12 – 36 VDC)
GPS module| channels| max. 72 satellites traceable
Accuracy time pulse signal| RMS| 30 ns
99%| 60 ns
Output| DCF| Time code UTC or CET Impulse duration (typical): logic 0:
100 ms: logic 1: 200 ms
CET:| automatic daylight saving time change according to valid rule.
announcing bit A1 (Bit 16) supported
CET:| last Sunday in October 03:00 -> 02:00
CEST:| last Sunday in March 02:00 -> 03:00
Accuracy| Current loop| Leading edge DCF (typical): +/- 5 µs (measured
at output GNSS 4500)
Length of synchronization| Cold start| < 5 minutes (typical)
Status display| LEDs| LEDs visible from below (cable side)
LED red:| UTC time output
LED green:| CET local time output
Power supply OK:| LED blinks once every five seconds (1
Synchronization OK:| LED blinks once per second (signal output)
Synchronization lost:| LED blinks once every five seconds (1
Electrical| Input voltage| 12 – 36 VDC +/-10%
properties| Power consumption| < 0.4W (< 34mA @ 12V)
Mechanical| Housing material| POM (polyester, UV resistant); black
upper, milky white lower
properties| Measurements| 85 x 80 x 86 mm (L x B x H) (L = distance to
wall)
Weight| approx. 200g
Cable| 10m, UV protected, 4-wire, 0.25mm2 (AWG 23), ext. up to 200m possible
Up to 400m with cross section of at least 0.5mm2 (AWG 20)
Environmental| Protection class| IP 65
requirements| Temperature range| 30 °C to +70 °C
Compliance| 2014 / 53 / EU (see
www.mobatime.com)
Accessories| Lightning protection| Art. no. 115948 SP 4500 lightning
protection unit for GNSS 4500 receiver
extension cable| Art. no. 104848 up to 100m UV resistant, black, 4×0.25mm2 ,
for outdoors
extension cable| Art. no. 104846 100m roll UV resistant, black, 4×0.25mm2 ,
for outdoors
Mounting
SP 4500 – Optional lightning protection box
The lightning protection box SP 4500 protects the master clock from dangerous voltage fluctuations (surges). To protect the antenna from lightning strike, it must be protected by a lightning protective system on the building.
The earth screw on the SP 4500 case should be connected to the building’s
earth system (ground), the same earth (potential) where you connect metallic
parts on the roof. The SP 4500 should be mounted just after the entrance of
the cable into the building.
Cross section of the earth cable:
Up to 3m distance and with flex cable, 2.5 mm2 is OK. For longer distance, 4 mm2 or even 6 mm2 flex earth cable should be used.
| SP 4500
---|---
Connections| Allocation| Side master clock| | Side GPS receiver
+DC in 18-60V
– DC in| yellow green| + DC out 18 – 25V
– DC out
+DCF out
– DCF out| white brown| + DCF in
– DCF in
Electrical properties| Input voltage Uin Output voltage Uout| +12 – 56
VDC +/-10%
Uin – 2V up to max. 27VDC
Mechanical properties| Material Measurements
Weigh| aluminum die cast
140 x 77 x 33 mm (L x B x H) (L = distance from wall) 180 g
Environmental conditions| protection class temperature range| IP 65
-30 °C to +70 °C
Order information| Art. no. 202154
Connections
Dimensions SP 4500
Serial Time Code Output
Depending on the supply voltages’ polarity, the receiver outputs either UTC (Coordinated Universal Time) or CET (Central European Time) in the form of a serial time signal. The data transmitted is DCF coded and contains additional information regarding the GNSS 4500’s operation, such as the number of visible satellites.
Transmitted Signals
Encoded Information in the time telegram
SATELLITES:
Number of tracked Satellites
TDOP:
Time Dilution of Precision
= 0 TDOP value not available
< 3 very good
< 6 good
10 bad
NAVIGATION SYSTEM:
Configured satellite navigation system, multiple sets are allowed
GPS: GPS
GLS: GLONASS
GAS: GALILEO
BDS: BEIDOU
Z1 & Z2:
Season Information
0 1 : Winter (UTC Winter only)
1 0 : Summer
S: Start Bit
P1: Parity Bit Minute
P2: Parity Bit Hour
P3: Parity Bit Date
Time Information (coding: BCD):
Coordinated Universal Time (UTC) or Central European Time (CET)
Time Frame:
1 minute, 1 bit/second
Output Circuit
The “+DCF out” and “-DCF out” signals can be connected directly to master
clocks, such as mobatime ETC or DTS devices. Use the information given in the
following figure to check compatibility with other manufacturer’s products.
Customer Support
The contents of this document change without prior notice
Headquarters/Production Sales Worldwide
MOSER-BAER AG I Spitalstrasse 7 I CH-3454 Sumiswald
Tel. +41 34 432 46 46 1 Fax +41 34 432 46 99
moserbaer@mobatime.com
www.mobatime.com
Sales Switzerland
MOBATIME AG I Stettbachstrasse 51 CH-8600 DÜbendorf
Tel. +41 44 802 75 75 1 Fax +41 44 802 75 65
info-d@mobatime.ch
www.mobatime.ch
MOBATIME SA I En Budron H 20 I CH-1052 Le Mont-sur-Lausanne
Tel. +41 21 654 33 50 I Fax +41 21 654 33 69
info-f@mobatime.ch
www.mobatime.ch
Sales Germany/Austria
BURK MOBATIME GmbH
Postfach 3760 l D-78026 VS-Schwenningen
Steinkirchring 46 1 D-78056 VS-Schwenningen
Tel. +49 7720 8535 0 I Fax +49 7720 8535 11
buerk@buerk-mobatime.de
www.buerk-mobatime.de
