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Ethernet Serial Hub

Engineered for: Vessel


The Ethernet Serial Hub (ESH) is designed for small survey vessel operations using Mini-Ranger 2 USBL to track multiple subsea targets.

At a glance

Topside control unit for Mini-Ranger 2 USBL installations

Provides power and comms to HPT 2000/3000 transciever

Integral GNSS with SBAS

4 serial ports RS232

Wi-Fi connectivity

Power, comms and timing for Mini-Ranger 2

Want to know more?


The ESH is the network interface between the in-water acoustic instrument, GPS and the PC that runs the positioning software.

In addition to accurately time-stamping incoming data from external devices such as gyro, VRU and GPS it provides power and communications for acoustic transceivers.

The ESH includes a time source that can be linked to an internal or external GPS PPS input, allowing the Ranger 2 system to accurately time-stamp incoming data from external devices such as gyro, VRU and GNSS to UTC.

Wi-Fi connectivity allows connection to a PC using a Wi-Fi adapter.


Feature Type 8211
Storage Internal 32 GB eMMC
Ports and Connectors 4 x RS232 ports (DB 9)
3 x RJ45 10/100 Ethernet sockets
1 x BNC jack 1PPS input
1 x BNC jack responder output 12 V, 100 mA
1 x SMA jack GNSS input (RF coaxial)
1 x Reversed polarity-SMA jack (Wi-Fi)
1 x 48 V transceiver connector (Amphenol)
1 x IEC socket 115/230 V ac, 1 A, 60/50 Hz
Power Supply Auto-sensing ac input voltage: 115–230 V, 60/50 Hz
Maximum current: 1 A
Average operating current: 0.16 A @ 230 V (without transceiver)
Environmental Specifications Operating -5 to 40°C (23 to 104°F)
Storage -20 to 55°C (-4 to 131°F)
20–80% (non-condensing)
Vibration - Frequency 5 to 13.2 Hz – 1.0 mm peak displacement
Vibration - Frequency 13.2 to 100 Hz – 0.7 g acceleration
Vibration - DNVGL-CG-0339 class A
Safety Complies with EN61010-1
EMC Complies with immunity & emission requirements of EN60945
Dimensions (Length x Width x Height) 1U Rack Mounting (without feet) 430 x 295 x 44.4 mm (16.9 x 11.6 x 1.75”)
Weight 3.3 kg (7.3 lbs)

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Power, comms and timing for Mini-Ranger 2