ATOP NTS8610 PTP Grandmaster Clock (IEEE 1588)
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The NTS8610 is a 1U rack-mount NTP server and IEEE 1588 PTP grandmaster clock that distributes GNSS-derived time across an industrial network. It delivers PTP and 1PPS accuracy of ±40 ns peak relative to UTC, and NTP accuracy of ±50 μs. Certified to IEC 61850-3 and IEEE 1613, it operates from -40°C to +85°C.
Time accuracy relative to UTC (PTP / 1PPS)±40 ns peak, with NTP at ±50 μs peak
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Description
IEC 61850-3 HV & IEEE 1613 Certified NTP/PTP Grandmaster with -40 to +85 °C Operating Temperature
With an operating temperature range of -40 to +85 °C, and IEC 61850-3 HV and IEEE 1613 offering up to four times the EMC protection compared to rugged industrial-grade standards, the NTS8610 is engineered to operate reliably in environments exposed to electrical noise, temperature extremes, and radiated disturbances—ensuring uninterrupted performance and high system availability. The NTS8610 NTP Server and IEEE 1588 PTP Grandmaster is the world’s first solution fully certified to both IEC 61850-3 HV and IEEE 1613 standards, delivering exceptional resilience and precision in demanding applications such as power substations, telecommunications networks, automation systems, and enterprise infrastructure.
NTS8610 specifications
| Clock accuracy - PTP timestamp | ±40 ns peak (relative to UTC) |
|---|---|
| Clock accuracy - 1PPS | ±40 ns peak |
| Clock accuracy - NTP timestamp | ±50 μs peak, ±40 μs average |
| Clock accuracy - modulated IRIG-B AM | ±1 μs peak |
| Holdover accuracy (OCXO) | <0.5 μs / 8 hours; <72 μs / 7 days |
| Oscillator | Advanced managed OCXO, with temperature drifting compensation |
| GNSS constellations (NTS8610 single band) | GPS L1, GLONASS L1, BeiDou B1, Galileo E1; maximum 3 concurrent |
| GNSS input port | 1x GNSS input, TNC (F), active antenna |
| Gigabit Ethernet ports | Two combo ports: 2x 10/100/1000BASE-T(X) RJ45 or 2x 100/1000Base-X SFP; PTP-capable and NTP-capable, SyncE per ITU-T G.8261/G.8262/G.8264 |
| Management ports | 2 x 10/100BASE-T(X) RJ45, NTP-capable |
| IEEE 1588 profiles | Default PTPv2; IEC/IEEE 61850-9-3-2016; IEEE C37.238-2011 and C37.238-2017; ITU-T G.8265.1, G.8275.1, G.8275.2; IEEE 802.1AS; Enterprise |
| NTP protocols | RFC 1119 (NTPv2), RFC 1305 (NTPv3), RFC 5905 (NTPv4), RFC 1769 (SNTPv3), RFC 2030 (SNTPv4) server |
| Redundancy | Device clustering (NTP only), PRP (IEC 62439-3), bonding active/backup, bonding LACP, combo ports |
| Sync module S1 outputs | Two configurable BNC (F) output channels: 1PPS/PPM/PPH, IRIG-B TTL (IEEE 1344 and C37.118.1), AFNOR, ASCII timestamp |
| Power supply - AC module | Rated 110-240 VAC 50/60 Hz or 110-250 VDC; input range 85-264 VAC, 88-300 VDC |
| Power supply - DC module | Rated ±24 to ±60 VDC; input range ±20 to ±66 VDC |
| Power consumption | Approximately 15 W typical, 20 W max |
| Housing | SPCC w/zinc plated body + aluminium cover, IP40 metal housing |
| Dimensions (W x H x D) | 440 x 300 x 44 mm |
| Weight | 3.9 kg max |
| Installation | 1U rackmount |
| Operating temperature | -40°C to +85°C (-40°F to 185°F) |
| Operating altitude | 5100 m |
| Ambient relative humidity | 5% to 95% (non-condensing) |
| Power automation certification | IEC 61850-3, IEEE 1613 |
| Safety | UL 62368-1, CB IEC62368-1/EN62368-1, IEC 60255-5 |
| Shock, drop and vibration | MIL-STD-810G Method 516.5; MIL-STD-810F Method 516.5; MIL-STD-810F Method 514.5 C-1 & C-2 |
| MTBF | 20 years |
| Warranty | 5 years, upgradable to 10 years |
Specifications taken from the manufacturer datasheet.
Which version do I need?
The base part number selects the GNSS receiver and the sync module. NTS8610 = single-band multi-constellation receiver; NTS8610M = multi-band, up to 4 concurrent constellations; NTS8610M (OSNMA) variants add Galileo OSNMA authentication but drop GLONASS. The -S1/-S2/-S3 suffix selects the sync module: S1 gives two configurable BNC output channels; S2 adds three more BNC output channels plus an IRIG-B RS-485 output on TB3; S3 gives two BNC outputs plus configurable IRIG-B/1PPS inputs, an RS-485 input/output and a fibre ST output, and S3 models can also take external IRIG-B or PPS timing inputs for APTS mode. Power modules are ordered separately as NTS8610-AC or NTS8610-DC and two are fitted. These are not regional frequency variants, so a UK buyer chooses on receiver band and required sync channels, not on territory.
Typical applications for the NTS8610
- Power substation time synchronisation to IEC 61850-9-3 and IEEE C37.238
- Telecommunications network synchronisation using ITU-T G.8265.1 / G.8275.1 / G.8275.2 profiles
- Industrial automation systems requiring sub-microsecond time distribution
- Enterprise IT infrastructure NTP time service
- Time-sensitive networking (TSN) and AVB networks using the IEEE 802.1AS profile
- Synchronising legacy IEDs and merging units over 1PPS or IRIG-B
Complete the stack
Products that work with this one — connect it, power it, and get it online.
NTS8610 — frequently asked questions
What time accuracy does the NTS8610 achieve?
Relative to UTC it achieves ±40 ns peak on PTP timestamps and on 1PPS, ±40 ns on demodulated IRIG-B, ±100 ns on RS-485 IRIG-B, ±1 μs on modulated IRIG-B AM, and ±50 μs peak (±40 μs average) on NTP. These figures assume the device has been locked to satellites for at least 24 hours.
How long can it hold time if the GNSS signal is lost?
Its managed OCXO oscillator holds to within 0.5 μs over 8 hours and within 72 μs over 7 days, after the device has been locked to satellites for at least 48 hours. On losing GNSS it switches to holdover mode, adjusts protocol attributes to the active time profile and raises alarms and syslog notifications.
How many Ethernet ports does it have, and are they all PTP-capable?
Four in total. Two are combo ports (2x 10/100/1000BASE-T(X) RJ45 or 2x 100/1000Base-X SFP) and are both PTP-capable and NTP-capable. The other two are 10/100BASE-T(X) RJ45 management ports, which are NTP-capable only.
What is the difference between the NTS8610 and the NTS8610M?
The NTS8610 uses a single-band multi-constellation GNSS receiver supporting GPS L1, GLONASS L1, BeiDou B1 and Galileo E1 with up to 3 concurrent constellations. The NTS8610M uses a multi-band receiver with up to 4 concurrent constellations and adds NavIC L5, and OSNMA variants of the M model support Galileo OSNMA for authenticating GNSS timing data (GLONASS is not supported on OSNMA models).
Is it certified for use in an electricity substation?
Yes. It is certified to IEC 61850-3 and IEEE 1613 for power automation, and ATOP states it is the first NTP/PTP grandmaster fully certified to both IEC 61850-3 HV and IEEE 1613. It also carries IEC 60255-5 safety approval and supports the IEC/IEEE 61850-9-3-2016 and IEEE C37.238 power profiles.
Can it be powered redundantly?
Yes. It takes two hot-swappable, detectable power modules, which may be 2x NTS8610-AC, 2x NTS8610-DC, or one of each. The AC module is rated 110-240 VAC 50/60 Hz or 110-250 VDC; the DC module is rated ±24 to ±60 VDC. Typical consumption is about 15 W, 20 W maximum.
How much does the ATOP NTS8610 PTP Grandmaster Clock (IEEE 1588) cost in the UK?
The ATOP NTS8610 PTP Grandmaster Clock (IEEE 1588) is supplied to order and priced on application. Send a quote request and we confirm the price and lead time in writing, usually the same working day. No account is needed. Indiott is a UK distributor invoicing with VAT (PSI Technologies Ltd, VAT GB 730 2340 83).
What is the lead time and delivery cost for the ATOP NTS8610 PTP Grandmaster Clock (IEEE 1588)?
The ATOP NTS8610 PTP Grandmaster Clock (IEEE 1588) is supplied to order. We confirm the lead time in writing with your quote, before you commit to anything. UK delivery is a flat £14.25 per order ex VAT, whatever the weight or how many items you order. We ship to GB and the EU and provide a VAT invoice with every order.
