Low Voltage Line PLC Modems

Low Voltage Line
PLC Modems

PLC Modems designed for use at existing Low Voltage lines up to 1 000 V. They provide data channel with excellent noise immunity and long communication distance (up to 5 km) without the need for repeaters.

Modem MT49S / MT49R / MT34R

PLC modem for use in Power Line Carrier Communication over Low Voltage Lines. Provided PLC Communication is stable, reliable, and operates successfully also in disturbed environment.

MT49S PLC modem
PLC modem MT34R

Key features:

  • Operates on any power lines 0 to 1,000 V
  • Extraordinary communication distance up to 5 000 m
  • Communication interfaces RS485, RS232 or RS422*
  • Single-phase and three-phase variants
  • Advanced DSP algorithms and error-correction codes
  • Routing in the network
  • High transmission output, narrowband communication
  • Easy configuration through RSet application

*Valid for MT34R modem

Typical applications:

  • Communication in the industry and transport
    • Production processes, energy balance
    • Connection with remote sites (boreholes, treatment plants, Photovoltaics …)
    • Maritime transport automation systems
  • Smart grids
    • Meter readings (electricity, water, heat, gas …)
    • Distribution control
  • Building automation
    • Industrial areas, office and residential buildings
    • Museums, archives, historic buildings, halls and stadiums
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Modem Comparison

MT49S Modem is designed to provide a data connection via existing 230 V power lines. The advantage of the modem is automatic and adaptive build of G3-PLC network according to the parameters of LV line and creation of an encrypted tunnel for transparent data transfers. It allows to use any protocol (Modbus, DLMS, Profibus, etc.) using standard interfaces such as RS485, RS232 or Ethernet.

Modem MT49R is an intelligent interface between PLC communication line and connected device with serial line (i.e. PC, programmable logic controller, intelligent e-meter etc.). Module receives data from connected device via serial line and subsequently trasmits received data to the PLC communication channel. You can transfer data in any protocol to a maximum length of one packet of 60 Kbyte.

MT34R Modem is designed to realize a data connection over an existing 230/400 V power lines. It has RS485, RS422 or RS232 serial interface, which can transfer almost any protocol, thanks to the transparent mode. The device can be operated not only in pair mode for interconnected two points, but it is also possible to create larger networks containing repeaters.

MT-49SMT-49RMT-34R
Number of phases for Rx/Tx113
PLC standardG3-PLCMTECMTEC
Max. communication rate280 kbps10 kbps10 kbps
InterfacesRS232, RS485, EthernetRS232, RS485RS232, RS485, RS422
Carrier frequency adjustment✓✓✓
Possibility of external coupling✓✓✓
Binary state transfer✓✗✗
Automatic routing✓✗✗
Advanced encryptionAES-128✗✗
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Technical Specifications

PLC communication

Carrier frequency154 – 487 kHz (MT49S)
60 – 145 kHz (MT49R)
40 – 120 kHz (MT34R)
ModulationDBPSK, DQPSK*, D8PSK*
PLC standardG3-PLC (MT49S)
MTEC (MT49R, MT34R)
Output amplitude134 dB/µV (MT49S/R)
128 dB/µV (MT34R)
(RL = 12 Ω)
Output currentMax. 1 APP (MT49S/R)
Max. 2 APP (MT34R)
Input sensitivity1 mV
Amplitude adjustmentYes, manual
Minimal SNR> 3 dB (PER 10-4) (MT49S)
> 9 dB (PER 10-4) (MT49R/34R)
ProtectionOver-current, short-circuit, thermal
PLC couplerBuilt-in internal
Output to an external couplerOn request
*Valid for MT49S modem

Power supply

Voltage85 – 305 VAC (MT49S/R)
100 – 430 VDC (MT49S/R)
3×230/230 V ±10 % (MT34R)
Frequency47 – 440 Hz (MT49S/R)
50 Hz ± 3 % (MT34R)
Power consumptionMax. 15 W (MT49S/R)
Max. 40 W (MT34R)

Dimensions and weight

W x H x D106 x 90 x 57 mm (MT49S/R)
250 x 235 x 150 mm (MT34R)
Weight450 g (MT49S/R)
1500 g (MT34R)

Data interface

Main dataRS485, RS232, RS422*
Galvanic isolationYes
ProtocolTransparent mode
Baudrate300 – 230400 bps
Data bits7, 8
ParityNone, odd, even
Stop bits1, 2
Data buffer8 kB (MT49S)
64 kB (MT49R/34R)
*Valid for MT34R modem

Environment

Operating temperature-40 to +60 °C
Storage temperature-40 to +70 °C
Relative humidity*0 – 95 %
*No water condensation

Safety

Electrical appliance class II – double insulated
Comply withEN 61010, EN 60529, EN 61000, EN 60870, EN 50065

Mounting

MountingDIN 35 rail mounting (MT49S/R)
BP CombiCard 6000 (MT34R)
EnclosurePlastic
IP ratingIP30 (MT49S/R)
IP65 (MT34R)

MT49S Modem Variants

The MT49S modem comes in 8 different variants, based on the capabilities supported. These variants are explained by the following table:

VariantG3-PLCRS232, RS485LANExternal PLC Coupler4x binary I/O
MT49S✓✓✗✗✗
MT49S-G✓✓✓✗✗
MT49S-B✓✓✗✗✓
MT49S-C✓✓✗✓✗
MT49S-GB✓✓✓✗✓
MT49S-GC✓✓✓✓✗
MT49S-BC✓✓✗✓✓
MT49S-GBC✓✓✓✓✓

PLC Modems Data Sheets

MT49S

MT49S PLC modem data sheet
VIEW

MT49R

MT-49R PLC modem data sheet
VIEW

MT34R

MT-34R PLC modem data sheet
VIEW
ModemTec
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