SECO-LARM E-931-S50RRLQ Large 50 ft Reflective Photoelectric Beam Sensor
The E-931-S50RRLQ is the large-format 50 ft reflective beam sensor in the SECO-LARM Enforcer line. It is commonly used where a single sensor head and reflector are preferred over a separate transmitter/receiver photoeye pair. The broad 12~250 VAC/VDC power input makes it flexible for many notification, security, and automation circuits, while the adjustable response time helps tune the sensor for different detection needs. In gate work, this style may be used for vehicle detection, entry alert, or auxiliary detection depending on the control wiring. It should not be substituted for a monitored safety device unless the operator, code requirements, and monitoring method specifically support it. The larger reflector and included hood hardware make alignment more forgiving than smaller reflective sensors.
Compatible With
- Outdoor gates and garage/overhead door detection circuits where a reflective beam sensor is supported
- Driveway, parking, warehouse, and industrial automation object-detection applications
- Alarm, entry notification, and perimeter detection circuits using Form C NO/NC relay inputs
- Control systems that can accept dry-contact photoelectric beam outputs
- Related SECO-LARM reflective sensor families: E-931-S50RRQ, E-931-S50RRGQ, E-931-S35RRQ, E-931-S33PRGQ; verify electrical and safety-monitoring requirements
- Not a guaranteed replacement for monitored UL 325 photo eyes unless the gate operator and wiring method support it
Features & Specifications
| Manufacturer | SECO-LARM |
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| Product Type | Large reflective photoelectric beam sensor |
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| Part Number | E-931-S50RRLQ |
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| Application | Reflective object detection for gates, doors, automation, and alarms |
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| Sensing Range | Up to 50 ft / 15 m |
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| Operating Voltage | 12~250 VAC/VDC |
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| Output | Form C NO/NC relay output |
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| Reaction Time | Adjustable 50~700 ms |
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| IP Rating | IP55 weatherproof |
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| Included Components | Sensor, large reflector, hoods, wall and pole mounting hardware |
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| Notes | Large reflective style; verify monitored safety requirements before gate safety use |
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Also Known As / Related Part Numbers
- E-931-S50RRLQ
- E931S50RRLQ
- E-931-S50RRL
- SECO-LARM E-931-S50RRLQ
- Enforcer E-931-S50RRLQ
- Large 50 ft reflective beam sensor
- E-931-S50RRQ related legacy sensor
- E-931-S50RRGQ related ETL UL325 monitored 50 ft sensor
- E-931ACC-RC1Q related round reflector
- E-931ACC-HR1Q related reflector hood
Technician Note
For gate operator safety replacement, first identify whether the original system requires monitored photo eyes, a 10k ohm monitored output, relay-only photo eyes, or a specific manufacturer safety edge/photoeye. Similar reflective sensors are not automatically code-compliant replacements.
Before Ordering Checklist
- Match the exact part number and sensor style.
- Check sensing range and mounting distance between sensor and reflector.
- Confirm control voltage and relay input requirements.
- Verify whether the application requires monitored UL 325 safety protection.
- Check whether a large reflector and hood assembly will fit the mounting location.
Important Ordering Warnings
- Do not market as universal UL 325 monitored protection unless the specific gate operator application supports it.
Professional Advisory
Photoeye alignment and low-voltage wiring should be performed with power safely controlled. For gate entrapment protection or UL 325 safety circuits, use a qualified gate technician and never bypass a required safety device.
Product Questions
Is E-931-S50RRLQ a monitored gate safety photo eye?
It is a reflective photoelectric beam sensor with relay output. It should not be assumed to satisfy monitored gate safety requirements unless the operator and installation specifically support that use.
What is the main difference between E-931-S50RRLQ and smaller reflective sensors?
The E-931-S50RRLQ uses a larger sensor and reflector arrangement, which can make alignment easier and provide a larger sensing area for some installations.
Can it be used outdoors?
Yes, it is designed for indoor or outdoor use and is commonly listed with an IP55 weatherproof enclosure.
What happens when the beam is blocked?
The relay output changes state when the infrared beam between the sensor and reflector is interrupted, allowing a compatible controller or alarm circuit to respond.
What should be checked before replacing an old photoeye?
Check voltage, output type, range, monitored-safety requirements, mounting style, reflector size, and the exact operator or control panel input being used.
