Siemens SIMATIC NET TeleControl SINAUT ST7, Системное руководство

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Technical specifications
6.6 Technical specifications of the radio clock components
SINAUT ST7 station control system
System Manual, 09/2016, C79000-G8976-C178-10
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DCF77 antennas
Response time < 1 ns
Protection level at 6 kV 1.5/50 µs wave at input < 12 V
Insertion loss for DCF77 signal Max. 3 dB
Input / output BNC female / BNC female
Input / output impedance 50 ohms
Degree of protection IP40
Temperature range
• Operation
•
Storage
• -20 °C to +80 °C
•
-40 °C to +85 °C
Humidity 95% no condensation
Technical specifications of the GPS receiver
Table 6- 5 Technical specifications of the GPS receiver
GPS receiver
Article number
6NH9831-8AA
Connector for power supply Screw terminals
Power supply 18 to 60 V DC
Power consumption 6 VA
Construction
• Housing material
•
Dimensions (W x H x D) in mm
• Weight
• Aluminum
•
65 x 105 x 130
• Approx. 700 g
Installation on 35 mm standard rail
Quartz accuracy ± 0.1 ppm after GPS control/synchronization and
at constant temperature
Emergency clock accuracy ± 25 ppm at 25 °C
Maintenance-free emergency clock backup 3 days
Type of receiver 8-channel phase tracking receiver
Evaluation L1 frequency 1575.42 MHz, C/A code
Sensitivity -143 dB
Synchronization time
•
Cold restart (initial installation without
position information)
•
Warm start (power down < 3 days)
•
30 min to 4 h
•
Approx. 1 min.
Temperature range
•
for specified data
•
with poorer free-run (accuracy) characteristics
•
0 to 50 °C
•
0 to 70 °C
Outdoor antennas