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Event Data Recorder
FRA & IEEE 1482.1-1999 Compliance
Vigilance Systems (Alerter)
Horn Sequencer
Auxiliary Light Control
Integrated Speedometer Control
Remote Download Port

Integrated Systems
TraxSyte® - Digital Video Recording System
Priority Alarm System

Speed Indicators
Analog Speed Indicator
LED Speed Indicator
Digital Speed Indicator
Model 7 Speed Verifier

Axle Alternator
Doppler Speed System
Isolation Amplifier 54114
Traction Motor Current Monitor

Control Systems
Automatic Ground Protection Relay Reset (AGPRR)
Engine Temperature Controller
Electronic Power Filter
Electronic Transition Control

Diagnostic Test Equipment
Automated Bench Test Equipment
Railroad Multimeter

LED Speed Indicator

Microprocessor-controlled, with a display panel that features light-emitting diodes (LED), this Bach-Simpson™ speed indicator has achieved wide acceptance with railroad crews; while it's dependable accuracy and rugged reliability, make it popular with railroad purchasing and maintenance personnel.

It is fully interchangeable with the electrical connections and mounting brackets of older analog models, making this unit a convenient replacement.

Double diodes in green, mark every five increment, offsetting them from the yellow, single-mile diodes. Other features include separate digital display of speed, acceleration indicator and overspeed warning. Options include multiple speed controlled relay outputs.

Our speed indicators are available as base mount, console mount or center cab mounted units for maximum versatility. Other models include a two-piece system, allowing the control circuitry to be remotely mounted from the display, for limited space applications.

Electrical Specifications

    Power Input:
    • +74 VDC nominal at 0.35 amp
    • 50 to 90 volts sustained performance range
    • Reverse polarity and transient protected
    • Case Electrically Isolated from supply

    Speed Signal Input:
    • 20 or 60 pulses per wheel revolution
    • 100 volts maximum
    • Input impedance: 47K ohms
    • Power input isolated from signal input

    Temperature Range:
    • Operating: -30°C to 50°C
    • Storage: -55°C to 60°C

    External Connectors:
    • Conforms to MIL-C-5015


Functional Specifications

    Speed Range (Auto Ranging):
    • Nominal range: 0-80 mph
    • Low range: 0-8 mph
    • Acceleration: 0-99 mph/min

    OverSpeed (2 Standard):
    • Relay contacts open at selected speed
    • Relay contacts protected against shorts and transients
    • Relay contacts isolated from supply

    • Nominal range: 1 mph
    • Low range: 0.1 mph

    Speed Maximum Error:
    • 1% of full scale

Specifications subject to change without notice. Contact Bach-Simpson™ for the latest information.

Ordering Information

    • LED Speed Indicator

    Part Number:
    • 48238-2060


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