SB2I_e

SB2I
Sensor box containing two sensors and two signal conditioners with 4...20mA, 2-wire outputs

Features

robust pressure die cast aluminium housing (IP67) with saltwater proof coating
twist free 4-point fastening of rigid, 3.2mm thick base PCB
two integrated signal conditioners with 4...20mA, 2-wire outputs
temperature drift compensation
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
10V ... 30V terminal voltage
programmable dynamic response
loop current limitation
high mechanical overload resistance
either connection polarity - possibility of 3-wire connection for both measuring loops
low pass filter with optional choice of cut-off frequency for suppression of interference frequencies

Description

The SB2I is a pressure die cast aluminium sensor housing (IP67) with two integrated sensors for measuring inclinations and/or accelerations along two axis.
As well as the sensors, the box contains two independent signal conditioners, each with a 4...20mA, 2-wire output, and two 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 small housing size in combination with the 3-wire connection enable the use of this high quality measuring system in harsh operating conditions.

Application

The SB2I is suitable for applications requiring precise inclination or acceleration measurements along two 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	max.: 6 x 1,5 mm²
Cable fixing	M12 x 1.5 cable gland, clamping range 6mm ... 7.5mm
Measuring range, Resolution, etc.	dependents on implemented SEIKA sensors
Degree of protection	IP67
Mounting orientation	any
Measuring planes (N.. sensors)	3 main housing planes
Measuring directions (B.., BD.. sensors)	in X,Y,Z coordinate of housing
Terminal voltage	10V ... 30V
Minimum loop currents	2.5mA ... 3.5mA
Maximum loop currents	22mA ... 26mA
Output signal loop current	4mA ... 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)

Block Diagram

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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