Diablo Controls DSP-22-2 Dual Channel DoorKing Plug-In Loop Detector
The DSP-22-2 is Diablo Controls dual-channel plug-in detector for DoorKing-style operator control boards. Instead of wiring to a separate 11-pin socket, it plugs into the detector area on compatible DoorKing boards and provides two detector channels for loop-based vehicle detection. This is useful on systems where the board expects DoorKing 9409 or 9405 style detector operation. The two-channel design should be matched carefully because one channel may be handled through the board connector while the other may use separate output connections depending on the installation. When replacing an old detector, note which loops are connected to which channel and whether the loop function is safety, exit, arming, or presence. Do not install a dual-channel detector just because it looks similar to the single-channel model.
Compatible With
- Select DoorKing gate operator and parking control boards with compatible dual-channel plug-in loop detector ports
- DoorKing 9409 and 9405 dual-channel detector replacement applications where confirmed
- Two-channel inductive loop detection for parking and access-control functions
- DoorKing systems using separate loop functions such as entry, exit, safety, shadow, or presence where supported
- Applications where the DSP-22-2 connector, channel count, and output wiring match the original detector
Features and Specifications
| Manufacturer | Diablo Controls |
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| Product Type | Dual-channel DoorKing plug-in loop detector |
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| Part Number | DSP-22-2 |
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| Application | DoorKing operator and parking-control vehicle detection |
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| Compatible Operator Type | Select DoorKing boards with compatible detector ports |
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| Channels | 2 |
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| Related DoorKing References | 9409 and 9405 where confirmed |
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| Loop Type | Standard inductive loops |
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| Notes | Not interchangeable with DSP-22-1 single-channel version |
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Also Known As / Related Part Numbers
- DSP-22-2
- DSP22-2
- DSP 22-2
- DSP-22S-2
- DoorKing 9409
- DoorKing 9405
- DK 9409
- DK 9405
- DoorKing dual channel loop detector
- Diablo DoorKing dual channel 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 DoorKing detector numbers are associated with DSP-22-2?
DSP-22-2 is commonly referenced with DoorKing 9409 and 9405 dual-channel detector applications when the board port matches.
When would I use DSP-22-2 instead of DSP-22-1?
Use DSP-22-2 when the DoorKing board and installation require two detector channels. DSP-22-1 is the single-channel version.
Does DSP-22-2 plug directly into the DoorKing board?
Yes, it is designed for compatible DoorKing plug-in detector ports, but the board revision and channel wiring must be verified.
Can one channel be used and the other left unused?
That depends on the DoorKing board and wiring. Follow the detector and operator instructions rather than assuming unused channels are acceptable.
What causes problems after replacing a dual-channel detector?
Common causes include channel wires swapped, a bad loop, incorrect detector model, wrong DoorKing board port, or a loop fault that was present before the detector was replaced.
