FDM: Frequency Deviation Monitor for 50/60Hz power line networks
Key Features
- Monitoring of Mains Frequency
- Pre-connected GNSS or PZF Receiver as Reference
- 2 analog outputs (time deviation and/or frequency deviation)
- Option: FDM-D with 5mm LED Display
- Serial RS-232 Interface
- Calculation of time based on the local frequency
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Previous Models - FDM:
FDM511 :: Frequency Deviation Monitor for 50/60Hz power line networks
FDM509 :: Frequency Deviation Monitor for 50/60Hz power line networks
Product Description
A preconnected reference is necessary that provides a serial time string and a PPS (pulse per second). The accuracy of the measurements is derived from these signals. The module calculates the frequency as well as the time, based on the mains frequency.
The time deviation (TD) is the difference of this calculated time (PLT) to the reference time (REF). This time deviation as well as the frequency itself is sent out via serial interface or is beeing converted to an analog voltage output provided by a DAC.
Functional Principle
The power line frequency to be monitored is applied via the rear panel mains socket of the LANTIME, then filtered and transformed. After that the sine-wave signal is fed into the microcontroller of the FDM module.
Calculation of the power line time PLT occurs by counting the periods of the mains frequency. Depending on the nominal frequency, the PLT seconds are incremented after counting 50 or 60 periods. To initialize the PLT, it is necessary to get the exact time via the serial interface (REF) and the pulse per second (PPS) from the preconnected reference. The time deviation TD is calculated once per second and is limited to ±1000 seconds.
Characteristics
Display | 8-digit alphanumeric dot matrix display, digit size 5 mm |
Input signal | 10 MHz, serial time string (via COM 1), PPS or USB mains frequency, 70 - 270 V AC, 50Hz or 60Hz |
Interface | Two asynchronous serial RS-232 ports, COM 0 and COM 1 Bau drate: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 Baud Framing: 7N2, 7E1, 7E2, 8N1, 8N2, 8E1, 7O2 Output mode: per second, per minute oder on request Output string: The frequency, frequency deviation, reference time, power line time and the time deviation are send out in one of three available formats. The formats are:
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Resolution of Measurement | frequency: accuracy of reference (10 MHz) ±100µHz time deviation: accuracy of reference (PPS) ±1 ms |
Analog outputs | 2 analog outputs for longtime-recording (time deviation and/or frequency deviation), range: -2.5 V ... +2.5 V, resolution: 16 Bit |
Dimensions of the front panel | FDM180D with display: 12HP/3U (60mm x 128mm) |
Electrical Connectors | 96-pin VG-rail DIN 41612 |
Operating Voltage | +5 V DC |
Current Draw | 400 mA |
Board type | Eurocard |
Board Dimensions | 160 mm x 100 mm, 1,5 mm Epoxy |
Supported Temperature | Operational: 0 - 50 °C (32 - 122 °F)
Storage: -20 - 70 °C (-4 - 158 °F) |
Supported Humidity | Max. 85 % (non-condensing) at 40 °C |
Warranty | Three-year warranty |
Options | Option: Eight character, 5 mm height, dot matrix LED display for showing the measurements and configuration
external large display for showing the measurements of a FDM180: DU35K/FDM (not included in delivery) |
RoHS Status of Product | This product is fully RoHS-compliant. |
WEEE Status of Product | This product is handled as a B2B (Business to Business) category product. To ensure that the product is disposed of in a WEEE-compliant fashion, it can be returned to the manufacturer. Any transportation expenses for returning this product (at end-of-life) must be covered by the end user, while Meinberg will bear the costs for the waste disposal itself. |
Downloads
Short Info Sheet
Manuals
- Handbuch (deutsch) technical-reference_m300_gps_fdm.pdf als PDF: 3204KB - Stand: 01.Mar.2022
- Handbuch (deutsch) technical-reference_m900_gps_fdm-d.pdf als PDF: 3707KB - Stand: 01.Mar.2022
- Manual (english) technical-reference_m300_gps_fdm.pdf as PDF: 3193KB - Rev.: 2022-Mar-01
- Manual (english) technical-reference_m900_gps_fdm-d.pdf as PDF: 3693KB - Rev.: 2022-Mar-01
- For drivers, SDKs, tools and utilities, please check our Download Section