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The IDM50b is a Frequency Shift Keyed (FSK) or Quadrature Amplitude Modulation (QAM) programmable modem for SCADA / Power-Line communication, supporting communication standards such as ITU V.21, V.23, R.35, R.37, R.38A, R.38B, V.29, Bell 103 and Bell 202. |
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Technical Specifications
Operation
| Type |
Digital data transmission over analogue medium in the audio frequency range (300-3400Hz). |
| Medium |
Power-line, Lead-line, Radio. |
| Mode |
Asynchronous or synchronous, point-to-point, point-to-multipoint, 2-wire or 4-wire.
Support for the synchronous Indactic 33 protocol. |
Standards - FSK
| |
Transmission Rate [Baud] |
Frequency Deviation [Hz] |
Channel Spacing (Bandwidth) [Hz] |
Channel Mean Frequency (Adjustable in Steps of 120Hz) |
| |
|
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|
Min [Hz] |
Max [Hz] |
| ITU R.35 |
50 |
±30 |
120 |
420 |
3300 |
| ITU R.37 |
100 |
±60 |
240 |
480 |
3120 |
| ITU R.38B |
200 |
±90 |
360 |
540 |
3060 |
| ITU R.38A |
200/300 |
±120 |
480 |
600 |
3000 |
| ITU V.21 |
300 |
±100 |
400 |
1080 |
1750 |
| ITU V.23/1/2 |
600/1200 |
±200/400 |
800/1600 |
1500 |
1700 |
| Bell 103 |
300 |
±100 |
400 |
1170 |
2125 |
| Bell 202 |
1200 |
±500 |
2000 |
1700 |
1700 |
Standards - QAM
| |
Transmission Rate [Baud] |
Symbol Rate |
Constellation Points |
Carrier Frequency [Hz] |
Mode |
| ITU R.35 |
4800 |
2400 |
4 |
1700 |
Half-Duplex |
| ITU R.37 |
7200 |
2400 |
8 |
1700 |
Half-Duplex |
| ITU R.38B |
9600 |
2400 |
16 |
1700 |
Half-Duplex |
Interfaces
| DTE Interface |
RS-232C, DB9 (female) connector.
Signals: DCD, RD, TD, DTR, SG, DSR, RTS, CTS, RI.
Character length: 5-9 data bits, 1 start, 1 stop.
RTC/CTS delay: Adjustable in 1ms increments from 40-6825ms.
Options to swich on fail relay if DCD off.
Option to transmit on RTS.
Configuration: AT command set. |
| Analogue Line |
DB15 (female) connector.
600Ω or higher impedance with return loos < 0.2.
Transmission level: 0 to -36dB, programmable in 1dB increments.
Receive level: 0 to -36dBm, programmable in 1dB increments.
Radio control: Half-duplex control and squelch detection. |
| Power Supply |
2-position screw plug type (for 2-2.5mm2 wire). |
General
| LED Indicators |
PWR, TXD, RXD, RTS, DCD. |
| Power Supply |
"-12" Model: 9-18VDC, 9-12VAC
"-24" Model: 18-36VDC, 14-23VAC
"-48" Model: 36-72VDC, 25-50VAC |
| Isolation |
Transformer up to 1500V. |
| Immunity to Noise |
Peak pulse noise: 100V peak.
Effective interference at 50Hz: 80V RMS. |
| Temperature |
Operation and Storage: -10°C to +50°C. |
| Dimensions |
Desktop: 112x30x170mm Aluminium Enclosure.
19" Rack: 160x100mm 3HE EUROCARD PCB, 6T in 1U and 3U rack. |
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