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Home > Product > GNSS Referenced Clock > Power Grid Time System
Power Grid Time System

GPS / Multi-GNSS power substation time synchronization system   (SNTM series)
PRODUCT OVERVIEW
SILIMIN SNTM is a full featured modular time syn system & time server combining 3 Satellite receivers with 3 BNC connector, oscillators, power supplies and up to 5 or 13 output optional modules in a single 2U/4U chassis. The heart of the system is the SILIMIN unique designed CPU with slots for connecting with various hot-swappable modules, and the front panel has one LCD screen and one Keypad which offers fast set up for system. It is a self-contained module with Quartz Crystal (OCXO) or Rubidium Atomic oscillator options, as well as optional receivers such as single GPS/ Beidou/GLONASS/GALILEO or receiver with 3 in 1 of them.
 
SNTM is a cost-effective, mid/large-scale and fully customizable synchronization system. It supports for multiple output modules including Serial time message(RS232/485), IRIG-B, DCF77, Pulse(PPS/PPM/PPH), IEEE-1588 PTPv2, NTP interfaces, alarm(Network or Relay) as well as custom outputs. Variey of signal types TTL / Idle contact / RS232 or differencial RS422 / Fiber make SNTM to satisfy all your different intellegent devices in electric power or industrial environment. Additional SNTM can be easily utilized by configuring as a slaved clock or a stand-by Master clock.
 
With the advantages of small power consumption, fanless design, reliable and stable operation, SNTM is satisfying the requirements of "Technical Specification for Clock System of State Grid", "Technical Principles and Operation Management Regulations of GPS Time Synchronization System for Shanghai Power Grid" and "Technical Specification for Time Synchronization of power system.

Application: Widely used in areas of Mid /Large Scale Power Stations, Substations etc
 

PRODUCT FEATURES
 Redundany:
    Receiving Module / Power Supply / function module redundancy 
    Set an additional clock as a stand-by via bidirectional IRIG-B

◇  Flexibilty:
    CPU board+ Slots Hot-plug design, 7 types of output can be chose and combined into infinite variety of syn systems
 Fast set-up: 6-buttons keypad, LCD display and 7-status LED in front panel

 Ease Management:
    Silimin EasyTime SET2000 and STM software support monitoring and configuration of all inputs and outputs of server, and clients
◇  Time keeping: Internal Precision time-keeping via OCXO or Rubidium clocks 
 Accuracy: 1PPS accuracy 25ns to UTC 

◇  IEEE-1588 PTPv2 grandmaster optional
◇  Stratum 1 vis GPS/ Multi GNSS or Stratum 2  
◇  Ruggedized shock and vibration-tested Chassis                           
 

TECHNICAL FEATURES
◇  Support signals from GPS / Beidou / GLONASS / GALILEO / PTP / NTP / CDMA / IRIG-B / OCXO or Rubidium Atomic clocks                               
◇  Support NTP / PTP / SNTP / ARP / UDP / TCP / Telent / ICMP / SNMP / DHCP and TFTP
◇  Multi-Core Processing and time edge of second ensure precise time messages
◇  Rubidium atomic taming technology, 24h holdover <±1μs ( 25 ℃)
◇  Electrical Isolation for input/output signals, Anti-Interference III Level                 
◇  Master Slave System and dual clock redundancy
 

MODEL OVERVIEW
SNTM series is a customizable system which inputs and outputs can be flexiblely DIY chose depending on project sites.
SNTM base models are SNTM3000 Master Clock and SNTM3000 Slave Clock, we will offer free design and solution for your projects.
 

SNTM STANDARD INPUTS AND OUTPUTS

 Input/Output Type SNTM1000 Master Clock SNTM3000 Slave Clock
           Signal Input             GPS 1 -
            Beidou 1 -
            IRIG-B 1 2
            NTP - -
            PTP - -
           Oscillator             OCXO 1 1
            Rubidum - -
  Network Output             NTP 1 -
            PTP - -
          Pulse Output             TTL - -
           Idle Contact 12 12
           RS422/485 12 -
          IRIG-B Output AC - -
DC 6 24
Fiber - -
          Serial Output              RS232 - -
           RS422/485 6 -
          DCF77 Output            Idle Contact - -
Fiber - -
          Alarm Output Relay - -
             Network - -
          Frequency Output - -
          Power Supply 1 1
          Chassis (2U/4U) 2U 2U

Note:
1. All models above comes with a standard Signal Receiver (G10) + Antenna kit with 30M cable;
2. For Pulse output, PPS / PPM / PPH mode, and TTL / Differencial / Idle contact are all available for you;
3. For IRIG-B, we have port and fiber, and you can choose TTL / Differencial / Idle contact;
4. Connectors: 
    BNC:  For GPS receiving/Frequency output
    Pluggable screw terminal block ( 2x6-pole or 2x4-pole):  For Pulse / IRIG-B / Serial port message / DCF77
    RJ45 port:  NTP output and Network alarm
    Fiber connector types : SC / ST / FC
5. Rubidium optional for all SNTM models ( Standard built in oscillator is OCXO)

6. 19’’ 1U/2U/4U Rack mountable chassis optional for SNTM:
    1U can support up to 1 Input modules, 3 Output modules, 1 Power Module
    2U can support up to 3 Input modules, 4 or 5 Output modules, 2 or 1 Power Modules
    4U can support up to 3 Input modules, 13 Output modules, 2 Power Modules 

7. please refere to "
Selection Guide" for further information.

 

GNSS RECEIVER
SNTS series is coming with GPS+BD 2 in 1 Receiver, and IRIG-B input as a redundany or used to extend a slave clock 
GPS / Beidou/ GlONASS/ GALILEO references are all optional

GPS Type: 12 channels, independent tracking, 1575.42MHz ( L1), C/A Code; 
GPS Acquisition Time:  Warm Start< 2mints, Cold start < 20mints

Beidou Type: 6 channels,independent tracking,(1561.1 MHz), B1
Beidou Acquisition Time:  Warm Start< 2mints, Cold start < 20mints


ACCURACY
Accuracy to UTC, locked to GPS ( 1PPS):  ±30ns
Holdover ( Free run):  ±25μs/ day; Holdover ( Free run):  ±5s/ year


NTP/PTP
Support NTP Requests/Second (typical): >8000; Support Maximum Number of NTP Clients (typical): >20,000
NTP Time Accuracy: 100ms; NTP Time Stamp Accuracy (Typical):  < 100us; PTP Time Stamp Accuracy (Typical):  ±100ns peak


PROTOCALS:
Timing protocals:  
NTP v2,v3,v4, PTP v2 (1588-2008); SNTP v3, V4, NTP MD5 Authentication
ARP / UDP / TCP / Telnet; ICMP / SNMP / DHCP / TFTP
Managment protocals
For monitoring, report and configurations, we not only have keypad on front panel for fast setup, but also M1 managment module as a option.
M1 module support SILIMIN SNTM Protocal (STM Software)
 
CPU CHASSIS KIT
1U 19'' Standard Rack Mountable Chassis kit includes:
1 CPU Module(for 1U clock), 1 Front panel(1x LCD display, 1x Keypad with 6 buttons, 7x Status LED)
1 satellite signal Receiving Module ( G10 Module default) and 1 Power module 
As picture below, 1U Standard CPU Module have 5 Module slots for Input/Output/ Power, so that you can only choose up to 1 Input Module, 3 Output Modules, 1 Power module


2U 19'' Standard Rack Mountable Chassis kit includes:
1 CPU Module(for 2U clock), 1 Front panel(1x LCD display, 1x Keypad with 6 buttons, 7x Status LED)
1 satellite signal Receiving Module (G10 Module default) and 1 Power module 
As picture below, 1U Standard CPU Module have 9 Module slots for Input/Output/ Power, so that you can only choose up to 3 Input Module, 4 or 5 Output Modules, 2 or 1 Power module
 


4U 19'' Standard Rack Mountable Chassis kit includes:
1 CPU Module(for 4U clock), 1 Front panel(1x LCD display, 1x Keypad with 6 buttons, 7x Status LED)
1 satellite signal Receiving Module (G10 Module default) and 1 Power module
As picture below, 1U Standard CPU Module have 18 Module slots for Input/Output/ Power, so that you can only choose up to 3 Input Module, 13 Output Modules, 2 Power module

POWER SUPPLY PARAMETERS
 PA1 Power Module: 
 Standard power module for 1U
 1x 220V AC/220VDC/110VDC Input
 1x 5V@8A Output
  Need 1 Slot
 PA2 Power Module: 
 Standard power module for 2U/4U,
 up to 2 PA2 for 2U/4U kits
 2x 220V AC/220VDC/110VDC Input
 1x 5V@8A Output 
 1x 12V @ 1.5A Output
 1x -12V @ 1A Output
  Need 2 Slots
 PA3 Power Module:
 It is needed when functional modules require.
 2x 220V AC/220VDC/110VDC Input
 1x 5V@8A Output 
 1x 12V @ 1.5A Output 
 1x -12V @ 1A Output
 1x 24V @ 1A Output
  Need 2 Slots
 
OUTPUT SIGNAL PARAMETERS
Ethernet  Interface  10Base-T/100Base-TX self-adaption
 MDI-X/MDI automatic polarity reversal; IEEE802.3
 Protocols  APR, ICMP. UDP、NTP、SNTP、PTP
 UDP receiving host  16groups: Support broadcast,multicast, providing timing output
Serial  Serial port  Baud rate: 300bps-115200bps can be changed with software 
 Data bits/parity bit/stop bit settable
 Optical fiber  Signal: TXD (wavelength options: 820mm,1310mm)
 RS232  Signal: TXD, GND.
 RS485  Signal: TA. TB,  each path can drive up to 128 loads. Signal: T
 TTL  Signal: TXD,GND.
 Open Collector (OC)  Signal: TXD,GND.  VCE: the maximum 300VDC
 Signal: TXD、GND.  ICE: the maximum 200mA
Pulse  Optical fiber  TTL level: rising edge, rising time≤50ns;
 RS422/RS485: rising edge, rising time≤100ns. 
 Optical Fiber: rising edge, rising time≤100ns;
 Static idle contact:rising edge, rising time≤100ns.     
 Open Collector (OC)  Time precision: ±1μs.  VCE:the maximum 300VDC
 Time precision: ±1μs.  ICE:the maximum 200mA
 RS232  Time precision: ±1μs. Signal:TXD,GND
 RS485 Bus mode  Time precision: ±1μs, each path can drive up to 128 loads
 Optical fiber  Time precision: ± 1μs. Wavelength options: 820mm/1310mm
 TTL  Time precision: ±1μs. Signal:TXD,GND
 Pulse width  10ms~800ms can be changed with software; step length 1ms
IRIG-B  Optical fiber  Time precision: ±1μs.(wavelength options: 820mm,1310mm)
 Open Collector (OC)  Time precision: ±1μs. VCE:the maximum 300VDC 
 Time precision: ±1μs. ICE:the maximum 200mA
 Time precision: ±1μs. Signal:TXD,GND
 IRIG-BAC  Precision time: ±3μs, balance 600Ω
 13VPP can drive more than 330Ω of the pure resistive
 load, output amplitude: 2~13VPP can be adjusted with software
 RS485 Bus mode  Each path can drive up to 128 loads
 TTL  Time precision: ±1μs.(wavelength options: 820mm,1310mm)
DCF77  Optical fiber  Time precision: ±1μs.Signal:TXD,GND
 Open Collector (OC)  Time precision: ±1μs.VCE:the maximum 300VDC
 Time precision: ±1μs.ICE:the maximum 200mA
 RS485 Bus mode  Each path can drive up to 128 loads by hardware dial.
 RS232  Time precision: ±1μs. Signal:TXD,GND.
 TTL  Time precision: ±1μs. Signal:TXD,GND.
Alarm  Alarm contact form  Relay Idle contact, contact capacity is 60VDC/1A.
  
ENVIROMENTAL CONDITIONS
Working temperature: -20℃~+60℃; Humidity:5%-90% (No Condensation)
Storage temperature: -40℃~+85℃; Humidity:5%-95% (No Condensation)
 

COMPIANCE, COMPATABILITY & CERTIFICATES
Anti-Interference design can meet the following standards:
GB/T13729-2002, GB/T14598.9-2002, GB/T14598.10-1996, GB/T14598.13-1998, GB/T14598.14-1998;
IEC60255-22-6:2001, IEC60255-22-7:2003
Compatability:
GB/T17626-1998, GB/T15153.1-1998, Ⅲ Level
Isolation protection
Electromagnetic isolation: Ethernet port 1.5kV.
Surge protection: Each axle out line 600w.
EMC
Compliant with EMC standards of the power system.
Certificates:
CE / RoHS / FCC / ISO9001 / 3C
Warranty: SILIMIN products come with a standard 3 year factory warranty
 

MANAGMENT METHODS
1. Front panel:
The front panel of SNTM integrates the familiar LCD display, and the keypad with 4 directional and 2 function buttons. This allows for a simple and fast on-site configuration of the main parameters.
2. Sofewares:
Hundreds of configuration options for the SNTM input and output, Alarm can be set by using SILIMIN’s powerful SET software.
STM Software: Compatible with SILIMIN M1 Module to ultized to configurate the detailed parameters of all other functional modules.
SET Software: Installed in PC for time managment of synchronization.


HOW TO BUY?
1. Please choose from our existed models for SNTM family;
 
2. Chassis CPU kits + Modules
Firstly define the Chassis size by confirming how many function modules you need, you will get 1 CPU Chassis Kit, then add additional modules into it.
Please refer to "Selection Guide” for detailed information about CPU Chassis kits and modules. 
1U/2U/4U Chassis includes:
1x front panel ( 1xLCD display + 1xKeypad + 7 status LED)
1x CPU board with slots ( 1U with 5 slots, 2U with 9 slots and 4U with 18 slots)
1x Satellite signal receiver module with built in Oscillator ( Default receiver module is G10)
If any needs to provide higher precision, please refer to “ Oscillator options” for parameters and accuracy for TCXO/OCXO/ Rubidium.
 
3. Please send a enquiry to our sales or engineer.

SILIMIN SNTM Time Synchronization System is a truly complete Modular equipment which allows to customize infinite number of combinations of input and output modules to meet almost any synchronization task.
Expansion slots on CPU board can be ordered extra anytime to expand the system when necessary.

There are 1U/2U/4U Rack chassis kits, 15 options for Signal Receiver Modules, 3 types of time-keeping osscilator, 7 kinds of Output Modules Optional: IRIG-B / Pulse / Serial Ports / DCF77 / Frequency / Network/ Alarm, and M1 management module is also availabe for parameter configuration, monitoring and managment. 

We have 3 power modules offering different outputs such as 5V/ 12V/ -12V/ 24V outputs, and PA2/PA3 are dual AC input as an hot-swappable redunancy.


 CPU CHASSIS CPU KITS OPTIONS FOR SNTM: 

  1U CPU  5 Slots: Up to 1 Input modules, 3 Output modules, 1 Power Modules
  2U CPU  9 Slots: Up to 3 Input modules, 4 or 5 Output modules, 2 or 1 Power Modules
  4U CPU  18 Slots: Up to 3 Input modules, 13 Output modules, 2 Power Modules
 
Each standard CPU Chassis kit ( either 1U or 2U/4U) includes:
1 CPU Module (with slots for other functional modules);
1 Front panel(1x LCD display, 1x Keypad with 6 buttons, 7x Status LED)
1 Satellite Signal Receiving Module (G10 Module default);
1/2 Power Module: PA1 / PA2 / PA3


Reference Signal Receiving Module Options for SNTM 
Each following module needs 1 slot:
 G1 Series:
 Satellite Input(GNSS)
 G10 Input Module  1* GPS+Bedou Input(2 in 1); 1*IRIG-B (DC RS422) Input; need 1 slot
 G11 Input Module  2* GPS+Beidou+Glonass Input (3 in 1), need 1 slot
 G12 Input Module  1* GPS Input, need 1 slot
 G13 Input Module  1* Beidou Input, need 1 slot
 G14 Input Module  1* Glonass Input, need 1 slot
 G15 Input Module  1* Galileo Input, need 1 slot
 G16 Input Module  1* GPS Input; 1* Bedou Input; 1* IRIG-B (DC RS422) Input, need 1 slot
 G17 Input Module  1* CDMA Input, need 1 slot
 G2 Series: 
 NTP/PTP Signal Input
 G21 Input Moudule  1* NTP Input, need 1 slot
 G22 Input Moudule  1* PTP Input, need 1 slot
 G3 Series:
 IRIG-B Signal Input
 G30 Input Module  1* IRIG-B ( DC RS422) Time Code Input, need 1 slot
 G31 Input Module  2* IRIG-B ( DC RS422) Time Code Input, need 1 slot
 G32 Input Module  2* IRIG-B (DC Fiber ) Time Code Input, need 1 slot
 G33 Input Module  2* IRIG-B ( AC) Time Code Input, need 1 slot
 G34 Input Module  2* IRIG-B ( AC Fiber) Time Code Input, need 1 slot
 
Oscillator Options for SNTM
Built in the Satellite Signal Receiving Module
No need extra slot for them

 K0 Built-in Oscillator  TCXO Oscillator Module; No need extra slot
 K1 Built-in Oscillator  OCXO Oscillator Module; No need extra slot
 K1 Built-in Oscillator  Rubidium Oscillator Module; No need extra slot

IRIG-B Output Module Options for SNTM
Each following output module needs 1 slot.
 B1 IRIG-B Module  12* IRIG-B (DC RS422/485); 2x pluggable screw terminal block ( 2x6-pole)
 B2 IRIG-B Module  12* IRIG-B (DC 24V Idle Contact signal); Need Support of PA3;
 2x pluggable screw terminal block ( 2x6 pole)
 B3 IRIG-B Module  12* IRIG-B (AC); Need Support of PA2;
 2x pluggable screw terminal block ( 2x6-pole)
 B4 IRIG-B Module  2* IRIG-B (DC Optical Fiber); 4* IRIG-B (DC RS422/485); 1x pluggable screw terminal block
(2x6-pole)                                                                                                                                      
 B5 IRIG-B Module  4* IRIG-B (DC Optical Fiber), Can be set as PPS;
 1xpluggable screw terminal connector; 1x Fiber (SC/ST/FC)
 B6 IRIG-B Module  12* IRIG-B (DC TTL level); 2x pluggable screw terminal block ( 2x6-pole)
 
Pulse Output Module Options for SNTM 
Each following output module needs 1 slot.

 P1 Pulse Module  12* Programmable Pulse (TTL level); Need support of PA3;
 2x pluggable screw terminal block ( 2x6-pole)
 P2 Pulse Module  12* Programmable Pulse (Idle Contact signal without Voltage);
 2x pluggable screw terminal block ( 2x6-pole)
 P3 Pulse Module  12* Programmable Pulse (Level RS422/485);
 2x pluggable screw terminal block ( 2x6-pole)
 P4 Pulse Module  12* Programmable Pulse (Idle Contact signal with 24V Voltage)
 Need PA3 support ; 2x pluggable screw terminal block ( 2x6-pole)

Serial Output and Mixed Signal Output Module Options for SNTM 
Each following output module needs 1 slot.
 S1 Serial Module  6* Time Message (RS232) serial output; 1x pluggable screw terminal block ( 2x6-pole);
 6* Time Message (RS422) serial output; 1x pluggable screw terminal block ( 2x6-pole)   
 PB Mix Module  6* Programmable Pulse (Level RS422/485); 1x pluggable screw terminal block ( 2x6-pole);  
 6* IRIG-B (DC RS422/485); 1x pluggable screw terminal block ( 2x6-pole)
 PBS Mix Module  4* Programmable Pulse (Level RS422/485)   
 4* Time Message (RS422) serial output; 2x pluggable screw terminal connector  
 4* IRIG-B (DC RS422/485)
 
DCF77 Output Module Options for SNTM 
Each following output module needs 1 slot.

 D1 DCF77 Module  12* DCF77 (Idle Contact signal without Voltage);
 2x pluggable screw terminal block ( 2x6-pole)
 D2 DCF77 Module  12* DCF77 Optical Fiber Code; 2x pluggable screw terminal block ( 2x6-pole)
 
Network module options (NTP/PTP) for SNTM
Each following output module needs 1 slot.
 N1 Network Module  2* 10/100/1000M independent NTP module, NTP/SNTP time Protocal; 1x RJ45 connector
 N2 Network Module  2* 10/100/1000M independent PTP module, PTP time Protocal; 1x RJ45 connector
 N3 Network Module  1* 10/100/1000M independent NTP module, NTP/SNTP time Protocal; 1x RJ45 connector
 4* USB for Serial Port message Output

Alarm Module Options for SNTM
Each GPS clock device can only choose 1 Alarm module, and each alarm module needs 1 slot
 A1 ALARM Module  1* PPS output;  
 1* IRIG-B output;
 1* Relay alarm message output for signal lost;  
 1* Relay alarm message output for power status;
 1x pluggable screw terminal block ( 2x4-pole)
 A2 ALARM Module  1* PPS output; 1* IRIG-B output;
 1* Relay alarm message output for signal lost;
 1* Relay alarm message output for power status;
 1x pluggable screw terminal block ( 2x4-pole);
 1* 10/100M independent NTP module, IEC104 Protocal; 1x RJ45 connector
 
Network managment module options for SNTM
M1 needs 1 slot.
 M1 Managment Module  1* 10/100M independent NTP module, SILIMIN SNTM Protocal; 1x RJ45 connector;
 STM Management software in CD is for monitor parameters setup of all modules,
 It supports remote scalable services as well.
 
Three Power module options for SNTM 
PA1 Power Module: Standard power module for 1U.
PA1 needs 1 slot

 PA1 Power Module:
 Needs 1 slot
 1x 220V AC/220VDC/110VDC Input; 
 1x 5V@8A Output
 
PA2 Power Module:
Standard Power for 2U/4U, you can choose 2 PA2 at most for each Chassis of 2U/4U;

PA2 needs 2 slots.

 PA2 Power Module:
 Needs 2 slots
 2x 220V AC/220VDC/110VDC Input;
 1x 5V@8A Output;
 1x 12V @ 1.5A Output;
 1x -12V @ 1A Output

PA3 Power Module:  
It is needed as per the requirements of functional modules.

PA3 needs 2 slots.

 PA3 Power Module:
 Needs 2 slots
 2x 220V AC/220VDC/110VDC Input;
 1x 5V @8A Output;
 1x 12V @ 1.5A Output;
 1x -12V @ 1A Output;
 1x 24V @ 1A Output
                                                                                                                                           
Antanna Kit Options for SNTM
GPS Antenna + Cable
  STX30  30m Antenna Kit: High-gain Antenna and 30m Antenna Cable ( Single / 2 in 1 / 3 in 1)
  STX50   50m Antenna Kit: High-gain Antenna and 50m Antenna Cable ( Single / 2 in 1 / 3 in 1)
  STX80   80m Antenna Kit: High-gain Antenna and 80m Antenna Cable ( Single / 2 in 1 / 3 in 1)
  STX100   100m Antenna Kit: High-gain Antenna and 100m Antenna Cable ( Single / 2 in 1 / 3 in 1)
 

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