Fermax Lock Release 540ND-S Max

Fermax 28341 Electric Lock Release 540ND-S Max (12Vdc Fail Secure)

The Fermax 28341 is a standard electric lock release mechanism designed for use in 12V DC powered Fermax door entry or access control systems. Its designation provides key information: 540 series standard body size, ND operation (Normal Fail Secure DC), S type standard flush shield, and MAX adjustable latch. This is a common configuration for basic remote unlocking applications.

Detailing the features: The 540 body size is suitable for typical timber and metal door frame preparations. ND signifies Normal Fail Secure DC operation – the lock remains securely locked when no power is applied, and requires a continuous 12V DC voltage to be supplied for the duration the door needs to be unlocked. Releasing the button or signal cuts the power, and the strike immediately re-locks. This model does *not* have an automatic re-locking mechanism after the door cycles, nor does it have a manual override lever. The S shield is the standard grey flush mounting plate (approx 25x160mm), and MAX indicates the adjustable jaw feature, allowing fine-tuning of the latch alignment during installation.

The 28341 is a reliable choice for standard residential or commercial applications where fail-secure operation (security maintained during power loss) is required, using a 12V DC supply. Its simplicity and robustness make it a popular component in Fermax systems requiring basic electric strike functionality without automatic or manual override features.

Features

• Standard Duty Electric Lock Release (540 Series Body)
• Operation: ND - Normal Fail Secure DC (Requires continuous power to unlock)
• Voltage: 12V DC
• Shield: S Type Standard Flush Shield (approx 25mm x 160mm) - Grey
• Latch: MAX Adjustable Jaw (+/- 4mm adjustment)
• Reversible design (Left/Right DIN)
• Symmetrical body
• No automatic re-locking function
• No manual override lever
• Suitable for standard timber and metal door frames

Technical Specifications

• Manufacturer: Fermax
• Model Reference: 28341 (Type 540ND-S MAX)
• Operation Mode: Normal Fail Secure DC
• Input Voltage: 12V DC
• Current Consumption (12V DC): Approx 400mA (verify datasheet)
• Body Series: 540 (Standard)
• Shield Type: S Type Flush Plate (Grey, approx 25x160mm)
• Latch: MAX Adjustable
• Holding Force: Refer to Fermax datasheet

Dimensions

• Body Dimensions (540 approx): 75mm x 21mm (height x width) - depth varies.
• S Shield Dimensions (approx): 160mm x 25mm (height x width).