Best For: Single-door access points at offices, warehouses, apartment common areas and gates that need locally managed PIN or compatible proximity-credential access
Rosslare AC-Q42SB Standalone Access Controller
The Rosslare AC-Q42SB combines a backlit 3 × 4 PIN keypad, a 125 kHz proximity reader and the door-control relays in one IP65 anti-vandal metal unit. It manages one door locally and supports up to 500 users without requiring a network controller, computer or management software.
Users can be assigned a four-to-eight-digit PIN, a compatible proximity credential or both, depending on the selected security mode and programming. This is a standalone single-door controller, not simply a reader and not a complete access-control system.
Credential compatibility: Use compatible 125 kHz, 26-bit EM cards or fobs. The AC-Q42SB does not read 13.56 MHz MIFARE or DESFire credentials. Confirm the credential technology and format before ordering.
Key Features
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Up to 500 users: assign PIN codes, proximity credentials or dual authentication
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Three security modes: Normal, Bypass and Secure
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IP65 outdoor rating: epoxy-potted, fully sealed slim metal enclosure
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Blue backlit metal keypad: clear operation in low-light areas
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Optical back tamper: provides a tamper output for compatible monitoring
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Built-in heater: supports operation from -20°C to 60°C
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Non-volatile memory: retains users and settings if power is interrupted
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Credential read range: up to approximately 65 mm with a suitable credential; actual range varies with the card and installation environment
Door Control and Inputs
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Lock relay: 2 A Form C relay with normally open and normally closed contacts for fail-safe or fail-secure locking arrangements
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Auxiliary relay: 2 A Form C relay with ten programmable operating modes
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Request-to-exit input: normally open dry-contact input for a compatible exit button
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Auxiliary input: normally open dry-contact input for monitoring or programmed functions
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Doorbell function: available from the asterisk key when used with the optional Rosslare BL-D40
Power and Professional Installation
The AC-Q42SB requires a regulated 12–24 V DC power supply. At 12 V DC, current draw can reach approximately 625 mA when the internal heater is operating, so the power supply must be sized for the keypad, electric lock and any connected accessories.
Professional low-voltage installation is recommended. The installer must confirm the lock type, power requirements, relay wiring, request-to-exit input, door monitoring and site security risk before commissioning. Because the relays are inside the external keypad, higher-risk doors may require a secure split-controller design with switching equipment located on the protected side.
What’s Included
- 1 × Rosslare AC-Q42SB standalone PIN and proximity controller
- Access to the AC-Q42SB product documentation in the Downloads tab
What’s Not Included
- Regulated 12–24 V DC power supply
- Proximity cards or fobs
- Electric strike, magnetic lock or other locking hardware
- Exit button, door contact, cabling or enclosure
- Rosslare BL-D40 doorbell accessory
- Installation, programming or commissioning
Specifications
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Model: AC-Q42SB
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Credential technology: 125 kHz, 26-bit EM
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User capacity: 500
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PIN length: 4–8 digits
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Environmental rating: IP65
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Operating temperature: -20°C to 60°C
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Dimensions: 120 × 76 × 22 mm
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Weight: approximately 521 g
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Manufacturer warranty: five-year limited product warranty
Delivery and Installation
CTC Communications provides Australia-wide delivery and Sydney access-control installation assistance. Browse compatible access cards and fobs, door locks, exit buttons and the wider Rosslare range. For help selecting a complete door solution, request a quote before ordering.
