ISS-2 time server
Category: Time synchronization
ISS-2 is a full-fledged time server fitted into a 19” rack and is intended as a comprehensive solution to time synchronization issues.
Main functions
- Reception of signals from global navigation satellite systems such as GLONASS and GPS time synchronization of devices connected over Ethernet under NTP, SNTP protocols
- Generation of precise time signals in one of the following forms: 1PPS, IRIG-B, IEEE 1344, 10 MHz, NMEA
- Up to 28 synchronization signal outputs
- Redundant power supply
- Indication of operating mode
- Self-diagnostics, including continuous antenna monitoring (failure in antenna connections and short-circuits
- Warm start mode: reduction of satellite search time and synchronization time in case of a unit`s fixed location
- Digital outputs for alarms and warnings signaling
- Configuration management via a web-interface
Global navigation satellite system`s signal receiver type
32-channel reception module of standard accuracy (support for GLONASS and GPS), L1 range
Antenna type
3–5 V rated, active GPS/GLONASS L1 antenna. 26–40 dB amplification, BNC connector
Average time until synchronization is achieved
|
cold start (location is not defined and is not fixed) |
up to 2 min |
|
warm start (without change in location) |
up to 30 s |
| hot start (loss of signal without power supply loss) | up to 20 s |
Time signals outputs
| types of BNC output interfaces | BNC (TTL, 50 Ohm), RS-232, RS-485, optical fiber (ST 850 nm MM), digital output (ОК 250V DC), Ethernet(10/100Base-TX) |
| number of output interfaces | 2 to 28 |
| number of Ethernet output interfaces | 2 to 6 |
| output signals format | IRIG-B000…IRIG-B007, IEEE 1344, 1PPS, 10 MHz, NMEA 0183 – RMC (on RS-232, RS-485) |
| synchronization protocols | NTPv4, SNTP |
Accuracy ratings
| absolute accuracy of time synchronization relative to UTC | ±1 μs |
| accuracy of time synchronization relative to UTC, at confidential probability of 0.95 | ±200 ns |
| accuracy of autonomous storage of internal time scale | ±5 ms/day |
| 10 MHz output signal`s frequency stability (at t = 100 s) | ±15*10-9 |
Power supply
| DC supply voltage range | 120–370 V |
| AC supply voltage range | 100–260 V |
| power consumption | up to 20 W |
Operating conditions
| operating temperature range | -40...+55°C |
| relative air humidity | 90% at 30°С |
| atmospheric pressure | 460–800 mm Hg |
| enclosure protection category | IP50 as per IEC 529-89 |
Design
| metal enclosure with DIN-rail mounting bracket | |
| overall dimensions (WxHxD) | 482х324х44 mm |
| weight | up to 5 kg |
