EDI LMA-1250-HV High Voltage Dual Relay Inductive Loop Detector
The EDI LMA-1250-HV is a DEFLECTOMETER single-channel inductive loop detector used in professional gate, parking, and access-control installations. It connects to a saw-cut or preformed inductive loop in the pavement and monitors changes in loop inductance caused by a vehicle in the detection area. When a vehicle is detected, the detector changes its relay output so the gate operator, barrier gate controller, telephone entry system, or access-control panel can respond according to the way that loop input is programmed. This type of detector is commonly used for free-exit loops, safety/reverse loops, presence loops, hold-open loops, arming loops, and parking control lanes.
This LMA-1250 model is the LMA-1250-HV version, with dual programmable relay outputs and 120 VAC to 240 VAC high-voltage detector power. The correct detector is not chosen by brand alone. The installer should match the original detector part number, input voltage, 11-pin socket wiring, relay output requirements, and desired fail-safe or fail-secure behavior. A low-voltage detector should not be placed into a high-voltage socket, and a fail-secure detector should not be substituted for a fail-safe detector unless the system design specifically calls for that behavior.
EDI detectors are commonly selected because they provide practical setup and troubleshooting features for field technicians. Depending on the series, features may include adjustable sensitivity, selectable loop frequency, sensitivity boost, loop fault monitoring, stored fault memory, output delay or extension, and LED indication for power, detect, and fault conditions. Those features help identify common loop problems such as open loops, shorted loops, large inductance changes, crosstalk between nearby loops, incorrect sensitivity settings, or a detector that is being powered from the wrong source.
Compatible With
This detector may be used with compatible vehicle loop systems when the power, socket wiring, output contacts, fail-safe/fail-secure behavior, and controller input requirements match the installation.
- EDI LMA-1250 Series high-voltage detector sockets
- 11-pin Molex / Amphenol style sockets wired for 120 to 240 VAC detector power
- commercial slide gate and swing gate operators using dual relay loop detector logic
- barrier gate and parking access systems requiring presence and pulse output options
- access-control controllers that accept dry-contact loop outputs
- safety, free-exit, arming, reverse, shadow, and hold-open loop applications when wired by the operator manual
Features and Specifications
| Manufacturer | EDI Traffic / Eberle Design Inc. |
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| Product Type | DEFLECTOMETER single-channel inductive loop detector |
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| Part Number | LMA-1250-HV |
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| Series | LMA-1250 |
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| Application | Vehicle detection for commercial gate, parking, and access-control systems using one inductive loop with two relay outputs for presence, pulse-on-entry, pulse-on-exit, duplicate, or fault-related output functions. |
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| Channels | Single channel |
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| Relay Output | Dual programmable relay outputs |
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| Voltage | 95 to 250 VAC, 50/60 Hz high-voltage input range |
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| Fail Behavior | Fail-safe version |
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| Connector | 11-pin Molex / Amphenol style detector connector |
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| Loop Inductance Range | 20 to 2500 microhenries on supported loop installations |
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| Setup / Diagnostics | Adjustable sensitivity, loop fault monitoring, fault memory, and frequency control depending on series |
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| Notes | Match voltage, socket pinout, output function, and fail mode before replacing an existing detector |
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Also Known As / Related Part Numbers
Common search references and related EDI detector family numbers include:
- LMA-1250-HV
- LMA1250HV
- LMA 1250 HV
- LMA-1250
- EDI LMA-1250
- EDI LMA1250
- LMA-1250 high voltage
- LMA-1250 fail safe
- LMA-1250 Series
- LMA-1250 dual relay
- Eberle Design LMA-1250-HV
- LMA-1250-LV - related family reference; verify exact interchange before ordering
- LMA-1250S-LV - related family reference; verify exact interchange before ordering
- LMA-1250S-HV - related family reference; verify exact interchange before ordering
- LMA-1250-LP - related family reference; verify exact interchange before ordering
- LMH4-11 - related family reference; verify exact interchange before ordering
- LMA-1800 - related family reference; verify exact interchange before ordering
- LMA-1150 - related family reference; verify exact interchange before ordering
Technician Note
Use where the detector socket supplies high-voltage power and the controller requires a dual-output detector. The second output can support different operating modes depending on the system setup. Do not interchange with low-voltage LMA-1250-LV or fail-secure LMA-1250S models without verifying socket power and output behavior.
Before Ordering
- Confirm the exact model number printed on the original detector.
- Confirm low-voltage or high-voltage detector input power at the socket.
- Confirm fail-safe or fail-secure operation required by the gate or parking system.
- Confirm whether the installation needs one relay output or dual relay outputs.
- Inspect the loop wiring for open circuits, shorts, water intrusion, damaged lead-in wire, or incorrect loop inductance.
- Confirm the 11-pin socket wiring and operator manual before applying power.
Professional Advisory
Loop detector wiring can affect gate safety, vehicle detection, and automatic gate behavior. Do not bypass monitored safety devices or use a detector to defeat required entrapment protection. If the gate moves unexpectedly, the loop circuit is damaged, or the detector socket voltage is not confirmed, have the system checked by a qualified gate or access-control technician.
Product Questions and Answers
What type of loop detector is the EDI LMA-1250-HV?
The EDI LMA-1250-HV is a DEFLECTOMETER single-channel inductive loop detector used with a buried inductive loop to detect vehicles for gate, parking, and access-control equipment.
What voltage should be used with the EDI LMA-1250-HV?
The EDI LMA-1250-HV should be powered from a matching detector socket. This model is specified for 95 to 250 VAC, 50/60 Hz high-voltage input range.
Is the EDI LMA-1250-HV a fail-safe or fail-secure detector?
The EDI LMA-1250-HV is a fail-safe version. Match this behavior to the original detector and the gate operator wiring before replacing the module.
What is the second relay output used for on the EDI LMA-1250-HV?
The second relay output can support functions such as pulse-on-entry, pulse-on-exit, duplicate presence output, or fault-related output behavior depending on the detector family and DIP switch setup.
What should be checked before ordering the EDI LMA-1250-HV?
Check the original part number, input voltage, fail-safe or fail-secure behavior, relay output requirements, 11-pin socket wiring, and the gate operator's loop detector instructions.
