Product Overview
The LMA-1250S-HV is a high-voltage fail-secure 11-pin detector in the LMA-1250 dual relay output family. It is used in access-control and gate systems that need one loop detector to provide more than one relay function, such as presence plus an auxiliary pulse or fault-related output, depending on how the detector is set. The HV voltage class must match the cabinet wiring. The S fail-secure designation also matters because it changes how the output behaves under certain loop fault conditions. This part should be selected by matching the original detector label, voltage, relay output requirements, and the function of the loop in the gate operator sequence.
This product is best selected by matching the exact part number and the job-site wiring, not just by appearance. EDI detector families include low-voltage, high-voltage, low-power, solid-state-output, relay-output, fail-safe, and fail-secure versions. Those details affect how the detector powers up, how it reports a vehicle, and how it behaves when the loop is open, shorted, or out of range.
Compatible With
This item may be used with the following products, systems, or application groups when the original part number, voltage, connector style, and wiring match:
- EDI LMA-1150 and LMA-1250 style 11-pin box type detector applications
- Gate operator control cabinets that use a matching 11-pin Amphenol box type detector connector
- Exit loop, safety loop, shadow loop, and presence loop installations where relay output detector wiring is required
- Commercial parking, access-control, drive-through, and gate operator panels using compatible 11-pin detector wiring
- Replacement work where the original detector label, wiring harness, voltage class, and fail-safe or fail-secure behavior match
Features & Specifications
| Manufacturer | EDI Traffic / Eberle Design Inc. |
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| Product Type | Fail-secure high-voltage 11-pin inductive vehicle loop detector |
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| Part Number | LMA-1250S-HV |
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| Application | High-voltage vehicle detection with dual programmable relay outputs |
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| Compatible Operator Type | Gate, parking, drive-through, and access-control systems with matching detector socket or harness |
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| Voltage | 120 VAC and 240 VAC |
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| Output / Connection | Dual programmable relay outputs |
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| Detection Type | Inductive loop vehicle detection |
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| Safety Monitoring | Not a photo eye or safety edge. Use only as part of a properly designed vehicle detection system. |
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| Notes | Verify original part number, voltage, connector style, output type, and operator wiring before ordering. |
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Key Features
- Automatic tuning
- DEFLECTOMETER display for sensitivity and loop frequency feedback
- Advanced loop diagnostics for open loop, shorted loop, and sudden inductance changes
- Four frequency selections to help reduce loop crosstalk
- Ten sensitivity levels
- Sensitivity boost for taller vehicles and sliding gate applications
- Loop fault memory for troubleshooting intermittent loop problems
- Wide loop inductance range commonly listed as 20 to 2500 micro-Henries
Also Known As / Related Part Numbers
- LMA-1250S-HV
- EDI-LMA-1250S-HV
- LMA1250SHV
- LMA 1250S HV
- LMA-1250-HV related fail-safe model
- LMA-1250S-LV low-voltage related model
- LMA-1250 Series
- LMA-1150 related single relay family
- LMH4-11 harness related accessory
Technician Note
When replacing a loop detector, do not assume the detector is the only failed part. A damaged loop, wet lead-in splice, poor terminal connection, moving gate steel near the loop, or another nearby loop on a close frequency can create symptoms that look like a bad detector. The best practice is to confirm loop resistance, insulation condition, power voltage, and output wiring before replacing parts.
Before Ordering
- Match the exact part number or approved replacement reference from the original detector label.
- Confirm voltage class before applying power. Low-voltage and high-voltage versions are not interchangeable.
- Confirm connector style, harness type, and pinout before replacing a 10-pin or 11-pin detector.
- Confirm whether the application needs solid-state outputs or relay outputs.
- Confirm fail-safe or fail-secure behavior when the original detector uses an S version.
- Check loop wire, lead-in splices, and frequency separation if the original complaint is intermittent detection or false calls.
- Do not use a loop detector as a substitute for required monitored photo eyes, safety edges, or other entrapment protection devices.
Professional Advisory
Loop detector wiring is often located inside the same cabinet as operator power wiring. If the cabinet has high voltage, damaged wiring, water intrusion, missing safety devices, or unpredictable gate movement, the system should be inspected by a qualified gate technician before replacement parts are installed.
Important Ordering Warning
This is a high-voltage detector version. Do not replace a low-voltage detector with an HV model. Match the original voltage label and have high-voltage cabinet work handled by a qualified technician.
Important Ordering Warning
This row is written for the fail-secure S version. Fail-secure and standard fail-safe versions can behave differently during loop faults. Match the original detector behavior before ordering.
Product Q&A
How is the LMA-1250S-HV different from the LMA-1150S-HV?
The LMA-1250 family provides dual programmable relay outputs, while the LMA-1150 family provides a single programmable relay output.
Is this the high-voltage model?
Yes. The HV model is commonly listed for 120 VAC and 240 VAC detector power.
Can the LV and HV versions be swapped?
No. The voltage class must match the cabinet wiring and original detector label.
What applications use a dual relay loop detector?
Dual relay detectors are used when the installation needs a primary vehicle call plus a second relay function such as pulse, presence, or fault output.
Why should fail-secure behavior be verified?
Fail-secure behavior affects detector output during loop faults, so it must match the operator design and safety requirements.
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