EMX PRX-320 WEATHERPROOF PROXIMITY CARD READER FOR GATE ENTRY EXTERIOR USE
The EMX PRX-320 is a weatherproof proximity card reader and keypad made for outdoor gate and door access-control points where a simple remote-only system is not enough. It can be used as a stand-alone access device for a gate, pedestrian door, equipment gate, or controlled entry point, and it gives the property owner several ways to authorize entry: card only, code only, card plus code, or card or code depending on the security level needed. For gate work, the important point is that this is an access-control command device, not a gate operator control board and not a monitored safety sensor. It is typically wired to a relay/access input or compatible controller so an approved credential can send an open command. Correct power, grounding, mounting location, and credential format matter, especially on exterior posts where metal surfaces and electrical noise can reduce card read range.
Compatible With
Select automatic gate operators, pedestrian-door access systems, electric locks, barrier arms, and access-control panels that accept a dry relay, keypad, or Wiegand-style access-control input. Commonly used with EMX proximity cards such as CARX-20, and with EMX PRX-320 mounting accessories such as PRX320-PAD when the installation calls for an adapter plate. Suitable for outdoor residential, commercial, HOA, storage, and small secured-entry applications when the credential format, power supply, and relay wiring match the installed controller. Verify the gate operator or access panel input type before ordering; this is not a direct replacement for a radio receiver, safety photo eye, telephone entry system, or high-current lock power supply.
Features and Specifications
| Manufacturer | EMX Industries |
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| Product Type | Weatherproof proximity card reader/keypad |
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| Part Number | PRX-320 |
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| Application | Outdoor gate, door, and controlled entry access |
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| Credential Type | Proximity card and keypad code |
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| Users | Up to 2000 card users and 8 passcode users |
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| Read Range | Approximately 5 inches under proper mounting conditions |
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| Power | 12 VDC; verify supply capacity and polarity |
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| Output | Relay/access-control output; verify controller input |
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| Notes | Avoid mounting directly on or near metal when possible because read range can be reduced |
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Also Known As / Related Part Numbers
PRX-320; PRX320; EMX PRX-320; EMX-PRX-320; PRX 320; weatherproof proximity reader keypad; EMX card reader keypad; PRX320-PAD mounting adapter plate; CARX-20 proximity access cards; ST-320 reference in some older documentation.
Technician Note
Match this item by exact model number, wiring method, monitoring method, voltage, and the operator or access-control input being used. Similar EMX access-control and photoeye parts can look alike but may use different outputs, ranges, credentials, or monitored safety methods.
Before Ordering
- Confirm the original EMX part number or the exact product family on the installed system.
- Verify voltage, wiring, relay/Wiegand output, and monitored safety requirements before replacing a sensor or access device.
- Check mounting location, enclosure style, beam path, reflector layout, and environmental exposure.
- For photoeyes, confirm whether the operator requires monitored UL325 entrapment protection.
- For access-control products, confirm credential format, user capacity, and controller input type.
Professional Advisory
Gate and door safety devices must be installed and tested according to the operator manufacturer's instructions and all applicable safety standards. Do not bypass required photoeyes, edges, or monitored safety circuits. High-voltage wiring, hazardous-location wiring, and unsafe gate movement should be handled by a qualified gate, door, or electrical technician.
Product Questions and Answers
Can the PRX-320 be used outdoors?
Yes. The PRX-320 is designed as a weatherproof exterior card reader/keypad for gates and doors, but it should still be mounted and sealed according to the installation instructions.
Does the PRX-320 work as a stand-alone keypad?
It may be used as a stand-alone access-control device when the installation matches the relay, power, and credential requirements.
What cards are commonly used with the PRX-320?
EMX CARX-20 proximity access cards are commonly associated with PRX-320 and CR-2000 reader/keypad applications.
Is this a safety device for a gate opener?
No. The PRX-320 is an access-control device that authorizes entry. It does not replace monitored photo eyes, safety edges, or other required entrapment-protection devices.
What should be checked before ordering this reader?
Confirm the required credential format, power supply, controller input, mounting surface, and whether the system needs stand-alone relay control or Wiegand access monitoring.
