Diablo Controls DSP-7LP Low Power Fail-Safe Vehicle Loop Detector
The DSP-7LP is a compact, low-current, fail-safe vehicle detector for installations where the loop input needs relay contact output but the site has limited accessory power available. It monitors a buried inductive loop and changes state when a vehicle is over the detection area. In a gate system, that detection can be used for open, hold-open, safety, shadow, arming, or vehicle-presence functions depending on how the operator input is wired and programmed. The LP version is especially useful when compared with higher-current detectors because it keeps idle draw down on solar-powered systems. Fitment should be checked by the control voltage, terminal connections, loop condition, and required fail mode. If the original detector used plug-in pins, a different Diablo model may be required instead of this terminal-block version.
Compatible With
- Select low-voltage gate and access-control systems using relay-output loop detection
- Solar and battery-supported gate operators supplying 10 to 30 VAC/DC accessory power
- Standard in-ground inductive loops within the supported loop range
- Free-exit, safety, shadow, arming, or hold-open loop inputs when fail-safe relay logic is required
- Applications where a removable 7-position terminal-block detector is physically and electrically suitable
Features and Specifications
| Manufacturer | Diablo Controls |
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| Product Type | Low power fail-safe vehicle loop detector |
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| Part Number | DSP-7LP |
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| Application | Vehicle loop detection for gate, parking, and access-control systems |
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| Compatible Operator Type | Low-voltage operators or panels accepting relay-output detector contacts |
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| Voltage | 10 to 30 VAC/DC |
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| Output | Relay contacts |
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| Connector | Removable 7-position terminal block |
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| Notes | Fail-safe model; verify operator input and safety requirements |
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Also Known As / Related Part Numbers
- DSP-7LP
- DSP7LP
- DSP-7 LP
- DSP-7-LP
- DSP-7
- Diablo fail-safe microdetector
- Diablo low power fail-safe loop detector
Technician Note
Match the detector to the original part number, voltage, connector style, loop function, and output behavior. If a detector still shows a loop fault after replacement, test the loop and lead-in wiring before assuming the new detector is defective.
Before Ordering Checklist
- Confirm the exact Diablo Controls part number on the old detector or supplier record
- Verify the control voltage available at the detector connection
- Confirm the connector style, terminal layout, or plug-in board port
- Check whether the loop function is exit, safety, shadow, arming, hold-open, or presence
- Inspect loop resistance, lead-in splices, and water intrusion if the original detector failed
Professional Advisory
Loop detectors are vehicle-detection accessories and must be installed as part of a code-compliant gate or access-control system. Do not bypass required monitored photo eyes, monitored safety edges, or other entrapment-protection devices. For high-voltage wiring, unsafe gate movement, or repeated loop faults, use a qualified gate technician.
Important Ordering Warnings
Similar Diablo detector numbers may not be interchangeable. Pay close attention to fail-safe versus fail-secure operation, low-voltage versus line-voltage power, terminal-block versus plug-in construction, and standard loop versus mini-loop/probe operation.
Product Questions and Answers
What is the difference between DSP-7LP and DSP-6LP?
DSP-7LP is commonly referenced as a fail-safe low-power detector, while DSP-6LP is commonly referenced as fail-secure. The correct choice depends on the loop function and operator requirements.
Can DSP-7LP be used on solar gate operators?
Yes, it is commonly selected for solar gate systems because it operates on low voltage and has very low standby current draw.
Does this detector come with the driveway loop wire?
No. The DSP-7LP is the detector module. The in-ground loop, lead-in wire, and conduit or saw-cut materials are separate unless included in a specific kit.
Will DSP-7LP work with every gate opener?
No. The operator must provide compatible 10 to 30 VAC/DC power and accept the detector relay output on the intended loop input.
What should be checked if the detector chatters or false detects?
Check loop resistance, loop inductance, lead-in splices, water intrusion, nearby electrical noise, and whether multiple detectors are creating interference.
