SL MA-110
Optical Transmittance Analyzer

SPECIFICATIONSFEATURES
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Dynamic interface for detection of lightpower changes
Optocoupler digital outputs
Error indication output
Analog output
Monitor output for normalizing the analog
signalReverse power protection
Short circuit protection
Housing 2.6 x 2.3 x 1" (67 x 58 x 25 mm)
IP 30 (NEMA 2) enclosure
10-pin screw clip

SENSOR SOLUTIONS /// MA-110

1 channel interface
Flexible optocoupler digital output
Sensor failure indication
Reverse power protection
Output short-circuit protection
Plastic housing providing IP 30 protection

The SL MA-110 Optical Transmittance Analyzer(OTA) is an electronic interface that supplies andevaluates fiber optic load sensors. The SL MA-110 serves
as the interface between the fiber optic sensor and theprocessing unit. It should be installed indoors or inside aweatherproof road side cabinet. The sensor system
consists of the SL MA-110 interface with transmitter (LED)and receiver (photodetector) connected by fiber optic
feeder cable to the fiber optic load sensor.
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 preset threshold, a
digital trigger signal is generated. This signal is
automatically reset after a certain time period. These
characteristics allow the SL MA-110 interface to operate
without the need for adjustment.
If the interface detects an interruption in the lighttransmission path, it generates a digital error signal. Bothdigital signals are transmitted via optocouplers which
behave similar to relays, allowing the use of a variety ofoutput circuitry. The dynamic analog load signal and thelight power monitor signal also have their own output clips.

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Optical Transmittance Analyzer

PERFORMANCE SPECIFICATIONSParameter
Supply Voltage

Typical Value+12 to +24 VDC

Supply Current (continuous)< 100 mA

Analog Output

0 – 10 V

Analog Output Impedance

1 k

Trigger Threshold

0.33% or 1% of light transmittance change

Sensor Attenuation

3 - 13 dB

Max Load for Optocouplers60 V/25 mA

Velocity Range

1 to 250 km/h

Feeder Length

up to 250 meters

Laser Class

3A

MECHANICAL DIMENSIONS in inches (mm)Model Number

Part Number

Trigger Level

SL MA-110-30-1005796-3

0.33% light loss

SL MA-110-1

0-1005796-1

1% light loss

SENSOR SOLUTIONS /// MA-11006/2017

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SL MA-110
Optical Transmittance Analyzer

CONNECTIONSa) Electrical
Pin Number

SignalDescription

012 ... 24 VDC

Supply Voltage

1GND

Ground2GND

Ground3

Vref

Reference Voltage (about 5 V)

4Vmon

Analog Monitor Signal

5Vanalog

Analog Load Signal

6–ERROR

Negative Error Optocoupler Output

7+ERROR

Positive Error Optocoupler Output

8–TRIGGER

Negative Trigger Optocoupler Output

9+TRIGGER

Positive Trigger Optocoupler Outputb) OpticalOutput--LED Transmitter--

SMA Series 905 Connector

Input

--

Photodetector--

SMA Series 905 ConnNORTH 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/sensorsolutionsMeasurement 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-110

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