SL MA-310
Optical Transmittance Analyzer

SPECIFICATIONSFEATURES
Dynamic interface for detection of light powerchanges
Optocoupler digital outputs
Trigger output (optocoupler)
Adjustable trigger threshold and duration(0.3%, 0.5%, 1% and 1.5% rel. light change/
1, 22, or 47ms minimum trigger duration)
Trigger indication LED for each channel
Error indication LED for each channel
Reverse power protection
Short circuit protection optionally
Variable output circuits suitable over jumperswitches
Conforms to RoHS standardsSENSOR SOLUTIONS /// MA-310

3 channel digital interface
Up to 30dB dynamic range with IR LED laser
Flexible optocoupler digital outputs
Trigger level and minimum pulse duration are
adjustable via jumpers
Specifically designed for compatibility withexisting toll equipment (dimensionally andelectrically)

The SL MA-310 three Channel Optical TransmittanceAnalyzer (OTA) is an electronic interface that operates
three fiber optic load sensors. The SL MA-310 serves as
the interface between the fiber optic sensor and theprocessing unit on system level. It should be installed in aweatherproofed road side cabinet.
The interface responds to the optical sensor signal ina dynamic (AC-coupled) manner, i.e. the electrical signal
caused when a load is applied to the sensor decreases tozero as the load remains applied. At a threshold, a digitaltrigger signal per channel is generated. This signal is
automatically reset after an adjustable time period. These
characteristics allow the SL MA-310 interface to operate
without the need for adjustment.
If the interface detects an interruption in the lighttransmission path of any channels, it flashes a particular
light for each interrupted channel. The output signals(trigger signals) are transmitted via optocouplers which
behave similar to relays, allowing the use of a variety ofoutput circuitry.

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Optical Transmittance Analyzer

PERFORMANCE SPECIFICATIONSParameter

Typical Value

Supply Voltage+12 to +24 VDC

Supply Current (continuous)< 400 mA

Trigger Threshold

0.3%, 0.5%, 1%, & 1.5% of light transmittance change

Sensor Attenuation

3 - 33 dB (infrared transmitter)Max. Strain Optocouplers

60 V/25 mA

Velocity Range

1 to 250 km/h

Feeder Length

up to 250 meters

Laser Class

3ACertification

RoHS

MECHANICAL DIMENSIONS in inches (mm)8.00(203.20)
0.15(3.81)
0.75(19.05)

3.5(88.9)

0.25(6.35)
0.25(6.35)

0.25(6.35)

Model Number

Part Number

Laser

SL MA-310-IR

3-1007153-2

IR

SENSOR SOLUTIONS /// MA-310

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SL MA-310
Optical Transmittance Analyzer

CONNECTIONSa) Electrical (8 pin pluggable screw clip)

Pin Number
0123Signal
12 ... 24 VDC
GND
DC Output
GND Output

Description
Supply Voltage
GroundOutput Voltage
Output Ground

SignalCollector
EmitterCollector
EmitterCollector
Emitter

Description
Collector output of channel 1
Emitter output of channel 1
Collector output of channel 2
Emitter output of channel 2
Collector output of channel 3
Emitter output of channel 3b) Connector Assembly

Pin Number
C1
E1
C2
E2
C3
E3c) Debug Pins

The Board has a GND pin and each channel has four pins for troubleshooting. All these outputs are
optionally connected to an analog output header. The four pins are:
Ax
Mx
Rx
Tx

-----

Analog load signal of channel xMonitor signal of channel x
Reference voltage of channel x
Trigger voltage of channel xd) Optical
Output
Input---LED Transmitter
Photodetector---SMA Series 905 Connector
SMA Series 905 Connector

NORTH AMERICA

ASIA

Measurement Specialties, Inc.,a TE Connectivity Company
Phone +1-800-522-6752
Email: customercare.hmpt@te.com

Measurement Specialties (China), Ltd.,a TE Connectivity Company
Phone: +86-400-820-6015
Email: customercare.chdu@te.com

TE.com/sensorsolutions
Measurement Specialties, Inc., a TE Connectivity company.
Accustar, American Sensor Technologies, AST, ATEXIS, DEUTSCH, IdentiCal, TruBlue, KPSI, Krystal Bond, Microfused, UltraStable, Measurement Specialties, MEAS, Schaevitz, TE
Connectivity, TE, and the TE connectivity (logo) are trademarks of the TE Connectivity Ltd. family of companies. Other logos, product and company names mentioned herein may be
trademarks of their respective owners.
The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However, TE Connectivity makes
no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall only be as set forth in TE Connectivity‘s Standard
Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or
misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application.

SENSOR SOLUTIONS /// MA-310

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