CenterClick NTP200 Series Documentation - Hardware
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o Hardware 200/250
o Hardware 220/270
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o Reimage 220/270
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NTP220 and NTP270 Hardware Overview
The NTP220 and NTP270 feature a small form-factor measuring about 4.25" x 2.5" x 1".
The front panel contains:
- PPS and NTP LEDs
- The command button (recessed)
- Micro-SD slot
- Power and System LEDs
The back panel contains all connections:
- DC Power input - 5.5mm/2.1mm or 5.5mm/2.5mm barrel connector
- PPS In/Out and Alarm - 4-pin terminal block
- Ethernet - 10/100mbps
- USB-MicroB - Local console configuration
- GPS Antenna - SMA connector
Hardware Architecture
The NTP220 and NTP270 are based on a fully-integrated PCB design as shown below. A lot of value is packed into its tiny case.
CPU, RAM, and Storage
The NTP220 and NTP270 use a multi-core ARM SoC from AllWinner.
128MB of RAM is integrated with the SoC.
A 512MB SLC NAND Flash is on PCB and stores the OS image and all configruation.
The Micro-SD is available for reimaging if needed.
GPS Module & Antennas
The NTP220 and NTP270 use a Quectel L76-L GPS Module
An active 3.3V powered antenna is supported.
USB Admin Console
The Micro-B USB connector is controlled by a WCH CH340 UART to USB adapter. This port is configured for 115200 N81 serial communication.
Power Supplies and Backup
The NTP220 takes a single external DC power supply input where as the NTP270 can be powered by dual inputs (DC input and PoE). The NTP270 has hardware fail-over between the 2 inputs. Power consumption is around 1 Watt.
The GPS module and RTC are powered by a rechargeable supercapacitor. If the power inputs are lost during a power outage or are temporarily disconnected. The GPS module and RTC will remain powered for about 3+ hours allowing for a quick re-acquisition of the GPS signal in just seconds instead of 30-90 minutes on a cold boot. The supercap will charge from 0% to 90% in about 20 minutes.
| NTP220 | NTP270 | |
|---|---|---|
| DC Power Input (2.1/5.5mm barrel connector) | 9-24V DC Nominal 8-25V DC Min/Max 9V-1A or 12V-1A recommended |
|
| 802.3af/at PoE | - | Yes |
| Dual Redundant Power Inputs | - | Yes (DC + PoE) |
| Priority when both DC+PoE Powered | - | When DC <12V: PoE When DC >12V: DC |
Hardware Revisions
Hardware Rev 2 & 3
- First production boards
