SBG3I

SBG3I
Sensor box containing three SEIKA sensors and three signal conditioners with 4...20mA output

Features

robust pressure die cast aluminim housing (IP65) with saltwater proof coating
twist free 4-point fastening of rigid, 3.2mm thick base PCB
three integrated signal conditioners with 4...20mA, 2-wire outputs
no separate supply voltage necessary
all SEIKA sensors of the B-, BD- and N- series fit the housing and can be installed in different directions of operation
output signals calibrated to customer's specifications
sensors and signal conditioners electrically isolated from housing
both output channels are electrically isolated from and independent of each other
EMC certified
internal, highly stable sensor supply voltages
10...30 Volt terminal voltage
programmable dynamic response
high mechanical overload resistance
either connection polarity - possibility of 4-wire connection for both measuring loops
low pass filter with optional choice of cut-off frequency for suppression of interference frequencies

Description

The SBG3I is a pressure die cast aluminium sensor housing (IP65) with two integrated sensors for measuring accelerations and/or inclinations along three axis acceleration and/or two axis inclination.
As well as the sensors, the box contains three independent signal conditioners, each with a 4...20mA, 2-wire output, and three separate, highly stable voltage supply feeding off the corresponding current loop, one for each sensor. Furthermore, each signal conditioner includes an active low pass filter, whose upper cut-off frequency / settling time can be adjusted to suit the measurement task, an output stage with current limitation, a noise voltage filter and a diode bridge for unipolar connection to the current loop. Interference signals caused by unwanted ground currents are eliminated by electrically isolating each sensor and signal conditioner from each other and the housing.
A special electronic temperature compensation system can significantly reduce the temperature sensitivity of the implemented sensors. The compact PG cable gland and compact housing size in combination with the 3-wire connection enable the use of this high quality measuring system in harsh operating conditions.

Application

The SBG3I is suitable for applications requiring precise acceleration or inclination measurements along three axis under harsh circumstances and returning of a 4...20mA output signal each. Areas of successful implementation include construction, mining, agricultural machinery, transportation and conveyor systems, ships, operation and automation technology as well as general mechanical engineering.

Technical Specifications

Terminals	6 x 1.5mm²
Cable fixing	M12 x 1.5 cable gland clamping range 6 - 7.5 mm
Measuring range, Resolution, etc.	dependent on the implemented sensor
Degree of protection	IP65
Mounting orientation	any
Terminal voltage	10V ... 30V
Minimum loop currents	2.5mA ... 3.5mA
Maximum loop currents	22mA ... 26mA
Output loop current	4...20mA (12mA for zero position)
Adjustable variables	zero point (12mA), amplification
Maximum load resistances	500 Ohm (at 24 Volt supply voltage)
Low pass filter	active, 3rd order, minimal ripple
Operating temperature	-40...+85°C

Options: special measuring ranges, calibration record, silicon encapsulation, custom wiring

Dimensions (in mm) and Connections

SEIKA front page

print version (pdf)

SEIKA Mikrosystemtechnik GmbH - Söllerweg1- D 87487 Wiggensbach - email: seika@seika.de - Tel.+49 8370 9290070 - FAX:+49 8370 9290079

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