The module FDM180 was designed to calculate and monitor the frequency and its deviation in 50/60Hz power line networks.
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.
| Input signal | 10MHz, serial time string (via COM1), PPS
mains frequency, 70 - 270VAC, 50Hz or 60Hz |
| Interface | Two asynchronous serial RS232 ports, COM0 and COM1
Baudrate: 600, 1200, 2400, 4800, 9600, 19200 Baud
Framing: 7N2, 7E1, 7E2, 8N1, 8N2, 8E1, 7O2, 8O1
output and average: once per second
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:STANDARD FDM String:
F:49.984 FD:-00.016 REF:15:03:30 PLT:15:03:30.368 TD:+00.368[CR][LF] SHORT FDM String:
FD:-00.016 TD:+00.368[CR][LF] AREVA FDM String:
[STX]
02049.984[CR][LF]
021-00.016[CR][LF]
022+00.378[CR][LF]
02315 03 30.368[CR][LF]
024068 15 03 30 [CR][LF]
[ETX] |
| Resolution of Measurement | frequency: accuracy of the oscillator (10MHz) ±100µHz
time deviation: accuracy of reference (PPS) ±1ms |
| Analog outputs | 2 analog outputs for longtime-recording (time deviation and/or frequency deviation),
range: -2.5V ... +2.5V, resolution: 16Bit |
| Electrical connectors | 96-pin VG-rail DIN 41612 |
| Power supply | +5V DC |
| Current consumption | 0.4 A - 1 A (depending on oscillator type) |
| Board type | Eurocard |
| Board dimensions | 160mm x 100mm, 1,5mm Epoxy |
| Ambient temperature | 0 ... 50°C / 32 ... 122°F |
| Humidity | Max. 85% |
| Warranty | Three-Year Warranty |