SL MA-210
Optical Transmittance Analyzer

SPECIFICATIONSFEATURES

Dynamic interface for detection of light powerchanges
Optocoupler digital outputs
Adjustable trigger threshold and duration(0.3%, 0.5%, 1% and 1.5% relative lightchange and 1, 22, or 47 ms minimum triggerduration)
Trigger indication LED for each channel
Error indication LED for each channel
Short circuit protection
Reverse power protection
Conforms to RoHS standards

SENSOR SOLUTIONS /// MA-210

2 channel digital interface
Up to 30dB dynamic range with IR LED lasers
Flexible optocoupler digital outputs
Trigger level and minimum pulse duration are
adjustable via jumpers
Sensor failure indication
Designed for compatibility with existing toll
equipment

TheSLMA-210
two-channel
OpticalTransmittance Analyzer (OTA) is an electronic interface
that operates two fiber optic load sensors. The SL MA-210
serves as the interface between the fiber optic sensor andthe processing unit on system level. It should be installedindoors or in a weatherproofed 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 tunable threshold, a
digital trigger signal per channel is generated. This signal
is automatically reset after an adjustable time period.
These characteristics allow the SL MA-210 interface tooperate 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
Supply Voltage

Typical Value+12 to +24 VDC

Supply Current (continuous)< 300 mA

Trigger Threshold

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

Sensor Attenuation for MA 310 IR

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

60 V/25 mA

Velocity Range

1 to 250 km/h

Feeder Lengthup to 250 meters

Laser Class3ACertification

RoHS

MECHANICAL DIMENSIONS in inches (mm)4.725(120.015)
0.25(6.35)

3.94(100.076)

0.4(10.16)

0.25(6.35)

Model Number

Part Number

Laser

SL MA-210-IR

2-1007153-2

IR

SENSOR SOLUTIONS /// MA-210

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SL MA-210
Optical Transmittance Analyzer

CONNECTIONSa) Electrical (8 pin pluggable screw clip)

Pin Number

Signal... VDC

Description
Supply Voltage

GND

Grou dDC Output

Output Voltage

GND Output

Output Grou dCollector

Collector output of chael

E itter

E itter output of chael

Collector

Collector output of chael

E itter

E itter output of chaelb) 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 (Ana Con). The four pins are:
Ax
Mx
Rx
Tx

-----Analog load signal of channel x
Monitor signal of channel x
Reference voltage of channel x
Trigger voltage of channel x

The analog output header pins are:

Pin Number
1234567891011-14

SENSOR SOLUTIONS /// MA-210

Voltage
GNDGND
Vana1Vmon1
Vtrg1
Vref1
Vana2
Vmon2
Vtrg2
Vref2
Not connected

Analog load signal of channel 1
Monitor signal of channel 1
Trigger voltage of channel 1
Reference voltage of channel 1
Analog load signal of channel 2
Monitor signal of channel 2
Trigger voltage of channel 2
Reference voltage of channel 2

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SL MA-210
Optical Transmittance Analyzerc) Stack Connector
This Connector (Stack Con.) is used to stack two or more MA-210 together. In such a stack you only
need to connect one board to the power supply.
d) OpticalOutput
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, TEConnectivity, 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-210

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