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S2CR 48/78 Acoustic Modem

S2CR 48/78 Underwater Acoustic Modem
S2CR 48/78
S2CR 48/78
S2CR 48/78 Directivity Pattern

S2C R 48/78 Underwater Acoustic Modem

S2CR 48/78 with a horizontally omnidirectional transducer beam pattern is a high-speed device for communication in reverberant shallow waters, providing data transfer rates up to 31.2 kbit/s over a 1000 m range. High operating frequency ensures great performance even in noisy environments.


  • Short-range operations in shallow waters
  • High speed communication tasks
  • Data link for AUVs and ROVs
  • Underwater acoustic sensor networks

Data Sheets

Underwater Acoustic Modem S2CR 48/78 Product Information, pdf


Operating Depth 200 m, Delrin housing
1000 m, Aluminium Alloy housing
2000 m Stainless Steel housing
2000 m Titanium housing
Operating Range 1000 m (2000 m in good conditions)
Frequency Band 48 - 78 kHz
Transducer Beam Pattern horizontally omnidirectional
Acoustic Connection up to 31.2 kbit/s
Bit Error Rate less than 10-10
Internal Data Buffer 1 MB, configurable
Host Interface [1] Ethernet, RS-232 (RS-485/422 optional)
Interface Connector up to 2 SubConn® Metal Shell1500 Series
Power Consumption Stand-by Mode 2.5 mW
Listen Mode[2] 5 - 285 mW
Receive Mode[3] - less than 1.1 W
Transmit Mode:
5.5 W, 250 m range
8 W, 500 m range
18 W, 1000 m range
60 W, max. available 
Power Supply[4] External 24 VDC (12 VDC optional) or
Internal rechargeable battery (optional)
Dimensions[5] Housing ø110 mm x 170 mm
Total length 265 mm
Weight, dry/wet Delrin: 2250/400 g
Aluminium Alloy: 2100/1400 g
Stainless Steel: 8000/5800 g
Titanium: 6500/4500 g

[1] See the Underwater Acoustic Modem S2CR 48/78 Product Information for available standard interface combinations.

[2] User-configurable Listen Mode is only available with a Wake-Up module installed. Power consumption in Listen Mode depends on Listen Mode settings.

[3] Power consumption for the RS-232 interface option. Add 600 mW for the Ethernet interface option.

[4] Contact EvoLogics for more information on power supply options.

[5] Dimensions of a Delrin housing, other builds are slightly larger.

Specifications subject to change without notice.