Print version Configuration options & accessories
The Underwater Inductive Modem Module (UIMM) provides a quick way for system integrators and instrument/sensor manufacturers to adapt new or pre-existing RS-232 instruments, such as acoustic current meters, Doppler profilers, optical sensors, etc., for integration with real-time moorings using Sea-Birdís Inductive Modem (IM) telemetry. (See Application Note 92: Real-Time Oceanography with Inductive Moorings and the Inductive Modem Module (IMM) for detailed system description.)
The UIMM is simply an Inductive Modem Module (IMM) housed in a pressure case and incorporating an integral inductive coupler and cable clamp. It is designed to be cable-connected to an RS-232 serial device such as a current meter, and then clamped to the jacketed mooring wire. The UIMM can also be used as a substitute for an IMM (housed inside a buoy) and an Inductive Cable Coupler (ICC). For this case, the UIMM receives inductive communications from other underwater IM devices and sends the data via RS-232 to the surface buoy (or bottom junction in a cabled observatory).
The IMM can be user-configured via RS-232 to send and receive commands necessary to control the serial instrument and receive or retrieve data. The UIMM communicates with an RS-232 instrument and requires a small amount of power from it via a 4-pin connector (UIMM does not have an internal power supply).
Sensor interface: RS-232
Sensor baud rate: 300, 600, 1200, 2400, 4800, 9600, or 19200 (IM telemetry rate 1200 baud)
Memory for sensor data: 16 KByte (40 stored samples maximum)
External power required: 6 - 30 VDC
Quiescent current: 300 microWatt *
Operating current: 15 milliWatt *
* Power draw higher for input voltages>19 VDC; consult factory.
Materials: Titanium (7000 meter) or Plastic (350 meter) housing
ADDITIONAL INFORMATION / LINKS:
Documentation -- manual, photos, technical papers, application notes, etc.
Sales Information -- options, accessories, cables, mount kits, spares, etc.
Links to Other Instruments of Interest
Specifications are subject to change without notice.
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