Relay Testing
RelayDoc · PRD
Portable RelayDoc Automated Relay Tester
Portable DC relay testing with a touchscreen interface, automatic test reports, and local or cloud access to recorded results.
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Mechanical & Onboard
Equipment and jumper cables for mechanical and onboard railcar and locomotive systems.
9 products
Relay Testing
14318
Portable Multiple Relay Tester
A portable tester for DC and AC railway signal relays, with coarse and fine controls and a digital multimeter.
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Relay Testing
14570
Portable Relay Tester with Internal Battery
Test railway signal relays using an internal rechargeable battery or an external power source.
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Relay Testing
15967
Relay Tester with Timer/Counter
Measure relay actuation and release times, code rates, and duty cycle alongside standard relay tests.
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Relay Testing
16121 / 16397
AC Vane Relay Testers
Bench test AC vane relay voltage, current, and contact resistance with dedicated meters and relay configuration controls.
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Relay Testing
16763
B-1 Relay Tester
A self-contained system for observing B-1 relay contact operation and measuring pickup and drop-away values.
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Relay Testing
17070
Basic Relay Slide
A handheld DC relay tester for measuring pickup and drop-away values of vital signal relays, with simultaneous voltage and current readings.
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Relay Testing
CRMS
Contact Resistance Measurement System
Measure contact resistance in vital signal relays with a system combining the Contact Resistance Measurement Unit (CRMU), a configurable Multiple Relay Test Rack, and an interconnect cable.
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Signal & Communications
17050
Track Signal Sniffer
Measure cab-signal frequencies, code rates, duty cycle, and current using a current probe around one rail.
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Signal & Communications
17400
DB 22.5 V Power Supply
A handheld power supply for ground testing that boosts a standard 9 V battery to 22.5 V DC, replacing a conventional 22 V battery.
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Signal & Communications
EarthSense
EarthSense Insulation Monitor
Continuously monitor insulation on unearthed electrical systems and detect leakage between AC or DC busbars and earth. Adjustable warnings help maintenance teams identify insulation faults early.
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Signal & Communications
TrackSense
TrackSense Remote Condition Monitoring
Monitor railway asset condition with expandable hardware, compatible off-the-shelf sensors, and cloud or local data analysis. Track performance trends and use alerts to support maintenance planning.
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Signal & Communications
17373 · SICO 2046
Insulated Rail Joint Tester
Measure insulated rail joint resistance with a separate current sensor that distinguishes current through the joint from nearby parallel paths, helping maintenance teams identify joint faults.
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Signal & Communications
17800-00 · SICO 3017 ISKO
Insulation Fault Locator
Locate defective insulation, short circuits, leakage currents, and poor connections in track circuits by tracking an AC signal along rails and cables. Use the operating frequency of an active track circuit, or the included generator when no usable signal is present.
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Signal & Communications
16901
Low Current Clamp-On Multimeter
Measure transmit and receive levels in coded and electronic track circuits, and measure current without disconnecting signal circuits.
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Signal & Communications
17711-01
AC/DC Current Probe
Measure AC and DC current in crowded wiring using a narrow Hall-effect probe connected to a compatible voltage-measuring instrument.
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Signal & Communications
17582
Multi-Function Ground Resistance Tester
Measure ground resistance, soil resistivity, and bonding resistance with one portable instrument.
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Signal & Communications
17576 / 17577
Hand-Cranked Megohmmeters
Test insulation on wiring, cables, switchgear, and motors with hand-generated DC test voltage and direct-reading analog scales.
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Signal & Communications
17553 / 17554
Ground Resistance Testers
Portable two- and three-point ground resistance testers with a choice of analog or digital display.
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Signal & Communications
17548 / 17549
Clamp-On Ground Resistance Testers
Measure resistance and leakage current in multi-grounded systems by clamping around the ground conductor, without auxiliary ground rods.
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Mechanical & Onboard
PA / Intercom
PA & Intercom Equipment
Onboard public-address and intercom equipment for passenger railcars, including control units, passenger emergency intercoms, and attendant-call annunciators.
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Mechanical & Onboard
Consist Signs
Consist Signs & Controllers
Interior and exterior consist signs with a run-number controller for onboard railcar identification.
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Mechanical & Onboard
17950-00 / 8- and 12-channel variants
Onboard Hot Bearing Detection Systems
Monitor bearing temperature onboard railcars and locomotives with a system family that brings together temperature sensors, connecting harnesses, and visual and audible alarm equipment. The 17950-00 8 Channel Hot Bearing Detection System replaces the obsolete 14020. Multiple 12-channel locomotive versions and other 8-channel variants are available with different functionality.
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Mechanical & Onboard
RAT
Return-Air Thermostats
Digital return-air thermostats for onboard railcar HVAC systems, with a local display for temperature and humidity.
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Mechanical & Onboard
25-pin / 28-pin
Testpoint Interface Assemblies
Interface assemblies that connect in series with rack-mounted plug couplers to provide access for voltage monitoring and circuit checks.
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Mechanical & Onboard
MU / COMM
27-Point MU/COMM Jumper Cables
27-point jumper assemblies for connections between coupled locomotives, locomotive-to-car, and car-to-car. MU cables carry traction-motor signals, dynamic-brake commands, and indications; COMM cables carry car-control and communication signals throughout the train.
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Mechanical & Onboard
17560
MU Cable Tester
A self-contained shop and wayside tester for conductor resistance and short circuits in standard 27-pin MU cables.
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Mechanical & Onboard
16814
MU Locomotive Trainline/Cable Test System
Test 27-pin locomotive MU trainlines and jumper cables for shorts, continuity, and ground leakage.
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Mechanical & Onboard
16470
Speed-O-Calibrator
Verify locomotive speedometer operation by driving the axle alternator while controlling the test from the cab.
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