SUBSEA-2 : Dual Axis Inclinometer for Marine & Subsea Use
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level developments SUBSEA-2 : Dual Axis Inclinometer for Marine & Subsea Use Features • Dual axis measurement, range from ±5 to ±45° • High resolution and accuracy • Designed for subsea & marine applications • Rated for use at 500m depth below sea • Fitted with a SubConn Micro subsea connector • Low temperature drift • Single-drop RS232, RS485 or multi-drop RS485 interface with ModBus protocol • Compact & stainless steel: 70 x 93 x 27mm • CE certified and RoHS compliant The SUBSEA-2 series inclinometers are specifically designed for installation on underwater structures or equipment & are rated for use up to 500m below sea level. They are a range of high performance dual axis tilt sensors for measurement of angle in both pitch and roll axes. These devices are available with standard measurement range options of ±5°, ±15°, ±30° and ±45°. The housing is a rugged and compact stainless steel assembly. They utilise a very high performance MEMS sensor which exhibits low long term drift and excellent temperature stability when compared with competitive devices. It has an RS232 and RS485 interface option with our standard communication protocol as well as a version with RS485 multi drop ModBus communication protocol. They are CE and RoHS certified, and are manufactured, calibrated and tested in our UK factory to guarantee performance to the stated specification. General Specifications Parameter Level Developments Ltd. Croydon, Surrey, CR0 2DN t : +44 (0)20 8684 1400 sales@leveldevelopments.com 97-99 Gloucester Road United Kingdom f : +44 (0)20 8684 1422 www.leveldevelopments.com

level developments SUBSEA-2 : Dual Axis Inclinometer for Marine & Subsea UsePerformance Specifications Parameter

SUBSEA-2 : Dual Axis Inclinometer for Marine & Subsea Use level developmentsHousing Drawing Connection Details The fitted connection is a male 4-pole SubConn Micro series bulkhead connector, part number MCBH4MSS. The pin functions for both RS232 and RS485 variants are shown in the table below: Level Developments Ltd. Croydon, Surrey, CR0 2DN t : +44 (0)20 8684 1400 sales@leveldevelopments.com 97-99 Gloucester Road United Kingdom f : +44 (0)20 8684 1422 www.leveldevelopments.com

level developments SUBSEA-2 : Dual Axis Inclinometer for Marine & Subsea UseAxis Direction and Mounting Orientation Mounted on a Horizontal Surface Mounted on a Vertical Surface Note: only the X axis can be used when mounted vertically & the accuracy can't be guaranteed because calibration is performed horizontally. Level Developments Ltd. Croydon, Surrey, CR0 2DN t : +44 (0)20 8684 1400 sales@leveldevelopments.com 97-99 Gloucester Road United Kingdom f : +44 (0)20 8684 1422 www.leveldevelopments.com

SUBSEA-2 : Dual Axis Inclinometer for Marine & Subsea Use Part Numbering Series Prefix 05 - ±5° Full Scale Measurement Range 15 - ±15° Full Scale Measurement Range 30 - ±30° Full Scale Measurement Range 45 - ±45° Full Scale Measurement Range RS232 - RS232 Interface with LD standard communication protocol RS485 - RS485 Interface with LD standard communication protocol RS485M - RS485 Interface with ModBus communication protocol Customer Specific Options (Optional) Example: SUBSEA-2-15-RS485M SUBSEA-2 Series dual axis inclinometer ±15° Full Scale Measurement Range RS485 Interface with ModBus...

Data is transmitted and received over RS232 in full duplex mode and for RS485 versions in half duplex mode. The default configuration is with the baud rate set to 38.4kbps, with 8 data bits, 1 stop bit and no parity. All commands are lower case and 7 bytes long. The time between each character of the command must be less than 100ms otherwise the device will discard the command. The settings are all stored in non volatile memory.

A free Windows based application for reading angle, logging and device configuration is available from our website. It requires Windows XP SP3, Windows 7 or Windows 8, and works with 32 and 64 bit systems. It also requires the .net framework V3.5 or higher, and will prompt you to download and install this from Microsoft if it is not already installed on your system. A COM port is also required, and can either be a built in COM port, or a USB to Serial COM port. The basic features are shown below: • Automatic or manual configuration of COM port parameters • Compatible with single or dual...

Data is transmitted and received over RS485 in half duplex mode using the ModBus RTU protocol. The following section provides some basic information about the serial communication between the host PC or PLC and the SUBSEA-2. The full ModBus specification can be obtained from http://www.modbus.org. ModBus is a command/response protocol over a serial bus. The default ModBus serial parameters are: 38400 baud, 1 start bit, 8 data bits, no parity and 1 stop bit. The 8 data bits are sent LSB first. The baud rate can be changed to 115200, 57600, 38400, 19200, 9600, 4800 or 2400 by sending the...

The frequency response of the sensor can be changed to any of the response times shown in the table. The filter is a 2nd order Besel low pass filter implemented in a IIR algorithm. Level Developments Ltd. Croydon, Surrey, CR0 2DN t : +44 (0)20 8684 1400 sales@leveldevelopments.com 97-99 Gloucester Road United Kingdom f : +44 (0)20 8684 1422 www.leveldevelopments.com

level developments SUBSEA-2 : Dual Axis Inclinometer for Marine & Subsea UseWriting to a Holding Register Data can be written to some registers, such as the registers that store the filter indexes for each axis frequency response. Function code 0x06 is used to write these registers as detailed below. Level Developments Ltd. Croydon, Surrey, CR0 2DN t : +44 (0)20 8684 1400 sales@leveldevelopments.com 97-99 Gloucester Road United Kingdom f : +44 (0)20 8684 1422 www.leveldevelopments.com

level developments SUBSEA-2 : Dual Axis Inclinometer for Marine & Subsea UseChanging the Device Address The Address of the device can be changed using the special function code 0x6E and special command code 0x91. The device will reply with the original address in the response, and will change internally after the response has been sent. Example 1: Read the angle from the sensor X axis with address 100 (0x64): Command address (0x64 = 100 decimal) | function code | | starting reg. to read (0x0000) 64 03 00 00 00 02 cd fe Response (positive angle) address (0x64 = 100 decimal) | function code |...