Ref: RAIL-x15LN

Railway approved MEMS Capacitive accelerometer | ±2g to ± 400g | 1 to 3 axes

Capacitive MEMS accelerometer for railway applications
Measuring range: from ± 2g to ± 400g
1, 2 or 3 axes
Accuracy: < 0.5% of measurement range
Analog output ± 4VDC
Bandwidth ±3 dB: up to 0-4.2 kHz
Noise spectral density: from 7 to 400 µg/√Hz depending on version
IP68 stainless steel housing
Electrical Connection: Railway certified cable output
Power supply: 6 to 40 Vdc
Temperature: -40 to +100°C (-55 to +125°C optional)
Shock resistance: ± 5000g
Factory calibration certificate included

Standard lead time : 4-6 weeks

Description

The RAIL series of capacitive accelerometers has been specially developed and validated for railway applications. Thanks to their measurement ranges, wide bandwidth, low noise and rugged design (shock limit: 5000 g) and IP68 sealing, these accelerometers can be used for vibration characterization, on-board diagnostics or infrastructure monitoring (rail, rolling stock, catenaries).

Electrical connection consists of an integral cable. The VariaPro Rail cable gland has been tested to DIN EN 45545-2 and 45545-3 fire protection standards.

RADOX TENUIS-TW 600V MM S cable is railway-certified and complies with the technical requirements of EN 50306 (particularly low temperature and high resistance to oil and fuel). It also meets the following standards:

DIN 5510-2
EN 45545-2
GOST 31565
NF F 16-101
NFPA 130
UNI CEI 11170-3

Available models

Model	RAIL-115LN	RAIL-215LN	RAIL-315LN
Number of axis	1	2	3

Specifications

Measurement range [±g]	±2g	±5g	±10g	±25g	±50g	±100g	±200g	±400g
Number of axes	1, 2 or 3	1, 2 or 3	1, 2 or 3	1, 2 or 3	1, 2 or 3	1, 2 or 3	1, 2 or 3
Sensitivity [mV/g]	2000	800	400	160	80	40	20	10
Output signal [VDC]	± 4 VDC	± 4 VDC	± 4 VDC	± 4 VDC	± 4 VDC	± 4 VDC	± 4 VDC	± 4 VDC
Non-linearity [% of full scale]	< 0.15 (typ), < 0.5 (max)	< 0.15 (typ), < 0.5 (max)	< 0.15 (typ), < 0.5 (max)	< 0. 15 (typ), < 0.5 (max)	< 0.15 (typ), < 0.5 (max)	< 0.15 (typ), < 0.5 (max)	< 0.15 (typ), < 0.5 (max)	< 0.15 (typ), < 0.5 (max)
Bandwidth: ±3 dB [Hz]	0-525	0-800	0-1100	0-1750	0-2100	0-3000	0-3600	0-4200
Power supply voltage [VDC]	6-40	6-40	6-40	6-40	6-40	6-40	6-40	6-40
Operating temperature	-40 to 100 °C*	-40 to 100 °C*	-40 to 100 °C*	-40 to 100 °C*	-40 to 100 °C*	-40 to 100 °C*	-40 to 100 °C*	-40 to 100 °C*
Housing	IP68 stainless steel	IP68 stainless steel	IP68 stainless steel	IP68 stainless steel	IP68 stainless steel	IP68 stainless steel	IP68 stainless steel	IP68 stainless steel

*optional: -55 to 125°C

Installation and operation

Output signal and installation

The amplified output signal of RAIL-x15LN capacitive accelerometers (±4VDC) is differential and independent of the supply voltage (6 to 40 VDC). With a 90gr IP68 hardened stainless steel housing (depending on version), an operating temperature range of -40 to +100°C, and shock resistance up to 5000g, these accelerometers are ideal for use in the harshest rail environments. Mounting is by screwing or gluing.

Dimensions

Wiring

Standard cable (30 gram/meter; PUR; AWG 30; Diameter: 4.4mm) is available from 4 to 8 wires. The standard length (6m) can be adjusted as required (limit of around 30m). A LEMO, Jaeger, BNC, SUBD or other type of connector can also be added as an option. Also available as an option, for 2 and 3 axis versions, a trident wire layout to simplify connection to the acquisition system.