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Technical Documentation • User Manual

BIO-S61A

Ultra-Compact Invisible RFID Drawer & Cabinet Lock (61 × 61 × 22 mm)
Electronic invisible RFID cabinet and drawer lock BIO-S61A
⚠️
INSTALLER GOLDEN RULES (READ BEFORE PHYSICAL INSTALLATION):
  1. Install brand-new CR123A Lithium battery: Use exclusively brand-new 3V CR123A lithium primary cells of INDUSTRIAL grade (e.g., Panasonic Industrial, Varta CR123A, Duracell Ultra). Never use rechargeable cells or depleted batteries.
  2. Program and test all credentials prior to mounting: Please ensure that the lock operates properly, and that all credentials (Manager Card and User Cards) are configured, tested, and verified at least 3 times on an open drawer/door before physically securing the lock body and latching the furniture!
  3. Understand the Reset consequences before pressing RESET: Before pressing the Reset button on the lock body, carefully read Section 7 to understand the factory reset behavior (all cards will be deleted and the lock restores its factory default Public Mode)!

1. Relative Products & Accessories

The BIO-S61A ultra-compact lock body is engineered specifically for concealed installation in small drawers, desk pedestals, file cabinets, and narrow spaces where standard-sized locks cannot fit. In addition, the lock body features an integrated expansion socket compatible with optional external wired accessory panels (Touch Code Panels B, C, D, E, 64RP as well as Proximity/Biometric Panels F, G, 64RF, 36SF, 51SF).

2. Hardware Overview & Components

Package contents of the BIO-S61A invisible furniture cabinet lock

Standard Set Contents (Included in Each Package):

  • Electronic RFID Ultra-Compact Lock: Lock Body + Compact Spring-Loaded Strike Hook
    ※ Standard factory configuration: each lock is pre-programmed out-of-the-box to operate in Private Mode.
  • Two Pre-Configured Proximity RFID Credentials (13.56 MHz Mifare):
    • 1× Manager Proximity Card: Administrative programming key
    • 1× User Proximity Card: Operational credential for daily unlocking
  • Complete Fasteners Set: Complete set of hardened mounting screws for quick installation in wooden, MDF, or metal furniture.

2.1 Lock Body Specification

Material: High-impact ABS polymer shell.
Dimensions: Ultra-compact 61 × 61 × 22 mm.

2.2 Compact Strike Hook

Designed for versatile installation in small drawers and cabinet doors:

2.3 Proximity Credentials (Cards, Fobs, Bands)

Diverse form factors of 13.56 MHz Mifare RFID credentials supported: waterproof silicone wristbands, robust ABS key fobs (teardrop/oval), ISO rectangular cards, and adhesive tokens.

2.4 Fasteners & Screws Specification

Corrosion-resistant, hardened installation screws provided for diverse cabinet substrates (hardwood, MDF, MFC, metal) and varying front drawer thicknesses.

2.5 External Power Interface & Battery Rules

Equipped with an integrated emergency backup port. Compatible with external battery boxes and emergency power adaptors to supply temporary DC power if internal battery is exhausted.

🔋
MANDATORY BATTERY DIRECTIVE FOR ULTRA-COMPACT LOCK BIO-S61A:
The BIO-S61A operates on a single 3V CR123A Lithium primary cell. To guarantee maximum read distance through timber and prevent mechanism stalling, only and exclusively install brand-new, fresh 3.0V CR123A Lithium batteries from a professional manufacturer – INDUSTRIAL Grade (e.g., Panasonic Industrial CR123A, Varta CR123A, Duracell Ultra/Procell CR123A).

STRICTLY PROHIBITED:
• NO 3.7V rechargeable 16340/RCR123A batteries: Voltage above 3.3V can permanently damage the internal 3V microchip.
• NO partially discharged or expired cells: Always install brand-new lithium cells with a verified voltage of ≥ 3.0V.

3. Product Installation Dimensions

Lock Body Dimensions (Ultra-Compact)

  • Outer dimensions: 61 mm × 61 mm × 22 mm.
  • Mounting screw holes: 4 × Ø4.5 mm holes arranged in a 46.5 mm × 46.5 mm square pitch.
  • Edge margins: 11.5 mm / 17.5 mm from hole centers to casing edges.
  • Latch receptor: Centered at 11.5 mm from top face.

Compact Strike Hook Dimensions

  • Outer dimensions: 60 mm (L) × 24 mm (W) × 16.7 mm (H).
  • Mounting screw holes: 2 × Ø4.4 mm holes with 46 mm center-to-center pitch.
  • Spring-loaded deadbolt pin extension: 24 mm center spacing.
Technical drawing and installation dimensions of BIO-S61A lock and locking pin catch

4. Installation Drawings & Drawer Assembly

The ultra-compact lock body mounts flush against the internal cabinet partition wall, drawer runner divider, or shelf using 4× screws. The compact strike hook mounts onto the inner face of the drawer front using 2× screws. The spring-loaded locking latch bolt engages seamlessly into the lock body receptor slot. Ensure accurate alignment before securing fasteners firmly.

5. Operational Parameters & Master Matrix

5.1 Technical Parameters

Housing Construction High-impact ABS for lock body shell; Acrylic & PC for optional panels
Current Consumption Static standby consumption: < 50 μA @ 3V
Operating load current: < 200 mA
Locked-rotor current: < 350 mA
Operating Voltage & Battery Lifetime DC 3V (1 × CR123A 3.0V Lithium INDUSTRIAL Cell)
Operating voltage range: 2.1V to 3.3V.
Estimated operational battery life: 6–12 months (depending on daily cycles).
Low Voltage Alarm Thresholds Pre-alarm threshold: 2.5V ± 0.1V (Blue LED + acoustic warning)
Ultimate critical cutoff: 2.1V (failsafe final unlock / no re-lock)
Environmental Tolerance Operating temperature: -15°C to +65°C
Operating humidity: 10% to 90% RH (non-condensing)
Electrostatic Protection (ESD) Air discharge: 15 kV | Direct contact discharge: 8 kV

5.2 Master Alarm & Notification Signal Matrix

The BIO-S61A integrates an acoustic buzzer and multi-state LED indicator to communicate system statuses, security lockdowns, and battery thresholds:

Status / Trigger Event Optical (LED) Acoustic (Buzzer) System State & Required Action
Valid Card Presented Green (1× flash) 1× short di Authorized unlock. Motorized latch bolt retracts.
Unauthorized Card Red (2× flashes) 2× short di di Access denied. Credential is not registered in system memory.
Low Voltage Warning (< 2.5V) Blue (steady flash) Double beep di di on each unlock LOW BATTERY ALERT (< 2.5V ± 0.1V): Warning on every opening. Lock remains functional for ~1,000 cycles, but fresh 3V CR123A Lithium battery must be installed promptly.
Critical Voltage Failsafe (< 2.1V) Blue (continuous) Periodic warning tone ANTI-ENTRAPMENT FAILSAFE (< 2.1V): Motor executes final unlock and CANNOT BE LOCKED AGAIN until new battery is installed. Prevents trapped drawers.
Door Left Open Warning (> 30s) Off Continuous alert for 10 seconds Drawer Left Open Alarm: Sounds in Private Mode if the drawer remains unlatched for over 30 seconds. Toggle with Button 1 + 2.
Anti-Tamper Lockout (5× wrong attempts) Red (continuous) 5× rapid beeps di di di di di SECURITY LOCKDOWN: 5 consecutive invalid presentations disable reader for 5 minutes. Present Manager Card to override immediately.
Factory Reset Executed Green (2× flashes) Triple beep di di di All memory cleared. Lock restores factory default Public Mode (unlatched state).

5.3 Mode-Dependent Credential Roles Matrix

Important Operational Principle: The functional behavior, access privileges, and unlocking logic of each RFID credential depend strictly on the active operational mode configured on the lock:

Credential Type Private Mode (Sec. 6.1) Public Mode (Sec. 6.2) Limited Public Mode (Sec. 6.3) Capacity
Manager Card
(Administrative Master)
Programming Only
Authorizes enrollment of User Cards. Does not unlock drawer directly.
Emergency Master Key
Allows facility staff to immediately unlock and override an occupied locker.
Programming Only
Authorizes enrollment of User Cards and replacement credentials.
Up to 10 cards
User Card
(Daily Operational Key)
Routine Access
Pre-enrolled cards. Retracts bolt; automatically re-latches after 5 seconds.
Dynamic Guest Key
Any guest Mifare card locks the drawer and becomes the sole key to unlock.
Daytime Latch
Pre-enrolled cards. Unlocks drawer (stays open); present again to re-lock.
Up to 30 cards (Dynamic in Public)
Delete Card
(Memory Clearing Key)
Batch Clear
Single presentation permanently revokes all 30 enrolled User Cards.
Locker Release
Single presentation clears current occupant's card, freeing drawer for next user.
Batch Clear
Single presentation revokes all enrolled User Cards simultaneously.
Up to 10 cards
Master Card
(Hardware Override)
Universal Emergency Override: Hardware-level emergency unlock credential across installations. 1 per installation

Integrated Button Functions on Lock Body:

6. Operations & Mode Configuration

Operating Modes Comparison – BIO-S61A

The BIO-S61A electronic furniture lock can operate in one of three dedicated modes. The table below outlines key functional differences, latch behaviors, and credential requirements:

Feature / ParameterPrivate ModePublic ModeLimited Public Mode
Factory Configuration★ FACTORY DEFAULT
Pre-configured to Private Mode by default.
Optional
Switched via Button 3.
Optional
Switched via Button 3.
Default Rest StateLocked (Closed)Unlocked (Open)Locked (Closed)
User Card ProgrammingRequired (up to 30 enrolled cards stored in memory).Not required (accepts any compatible Mifare card on locking).Required (up to 30 enrolled cards stored in memory).
Unlocking ProcedurePresent enrolled card to release latch (relocks after 5s).Present the registered session card to retract latch and clear memory.Present enrolled card to release latch — stays permanently unlocked.
Locking ProcedurePush door closed (automatic mechanical latching, no card needed).Push door closed + present card to enroll credential and lock.Push door closed + re-present card to lock at end of shift/session.
Typical ApplicationsPersonal desks, home cabinets, assigned employee lockers, offices.Gyms, fitness clubs, swimming pools, spas, shared day lockers.Shared tool cribs, departmental archives accessed frequently during work hours.

6.1.1 Mode Overview: The lock remains latched under Private Mode. Only enrolled User Cards can unlock the drawer. Upon unlocking, the latch bolt automatically re-extends after 5 seconds, allowing the drawer to be pushed shut and latched securely.

6.1.2 Set Lock into Private Mode:

Press Button “3” for 2s
→
Prompts with “di di” (2 beeps) & green flash
→
Private Mode Active

🛡️ 6.1.3 Registering New Manager Card (Programming Authority)

In Private Mode, the Manager Card authorizes the enrollment of new User Cards.

Press Button “1” for 2s
→
Green LED flashes continuously
→
Present an unassigned card
→
Prompts with “di”
→
Manager Card Enrolled
Notice: One lock can store up to 10 Manager Cards.

🔑 6.1.4 Registering New User Card(s) (Up to 30 Credentials)

User Cards are the daily credentials used to unlock the drawer.

Present Manager Card 1 time
→
Green LED flashes continuously
→
Present unassigned card(s)
→
Prompts “di” for each
→
User Card(s) Enrolled
Notice: Maximum capacity: 30 user cards.

6.1.5 How to Use User Card:

Present User Card
→
Lock unlocks
→
Latch bolt extends after 5s
→
Push drawer firmly to latch closed

6.1.6 Registering Delete Card (Batch Clear All Users):

Press Button “2” for 2s
→
Green LED flashes
→
Present card → prompts “di”
→
Delete Card Enrolled

6.2.1 Mode Overview: The lock remains unlatched. Any user can present a Mifare card to lock the drawer, and only that same card can unlock it. Once unlocked, the drawer is released for the next user.

6.2.2 Set Lock into Public Mode:

Press Button “3” for 2s
→
Prompts with “di” (1 beep) & green flash
→
Public Mode Active

🛡️ 6.2.3 Registering New Manager Card (Emergency Master Key)

Press Button “1” for 2s
→
Green LED flashes continuously
→
Present unassigned card
→
Manager Card Enrolled

🔑 6.2.4 Registering New User Card (Automatic Guest Locking)

No pre-enrollment required! Any random Mifare card or band swiped by a guest will lock the drawer, and only that same card unlocks it.

6.2.5 How to Use (Locking & Unlocking Workflow):

Present any card
→
Prompts “di” + green flash
→
Bolt extends → push drawer shut
→
Present same card to unlock

6.2.6 Registering Delete Card: Press Button “2” for 2s → present card → prompts “di”. Swiping clears current user.

6.3.1 Mode Overview: The lock begins latched. Once unlocked by an authorized user card, it remains continuously unlatched. When the employee finishes work, they present their user card again to extend the latch bolt and push the drawer closed.

6.3.2 Set Lock into Limited Public Mode:

Press Button “3” for 2s
→
Prompts with “di di di” (3 beeps) & green flash
→
Limited Public Mode Active

🛡️ 6.3.3 Registering New Manager Card

Press Button “1” for 2s → green flashes → present card → “di”

🔑 6.3.4 Registering New User Card

Present Manager Card 1 time → green flashes → present cards → “di”

6.3.5 How to Use User Card:

Present User Card → unlocks
→
Drawer remains unlatched
→
Present User Card again → bolt extends
→
Push drawer to close

6.3.6 Registering Delete Card: Press Button “2” for 2s → present card → prompts “di”.

7. Reset Lock (Restore Factory Defaults / Public Mode)

Press “Reset” button for 2 seconds
→
Prompts with “di di di” & green LED flashes twice
→
Reset Executed Successfully
🚨
CRITICAL FACTORY RESET CONSEQUENCES:
When the Reset button is pressed and held for 2 seconds:
  • ALL CREDENTIALS ARE PERMANENTLY DELETED: Every registered User Card, Manager Card, and Delete Card is erased from memory.
  • LOCK RESTORES FACTORY DEFAULT PUBLIC MODE: The invisible RFID lock immediately restores its standard factory state (Public Mode – default unlatched state). If you wish to use the lock in Private Mode, you must explicitly program it into Private Mode as outlined in Section 6.1.2 before registering daily user credentials.

8. Essential Operational Guidelines & Best Practices

  1. When the indicator light flashes in blue, battery voltage is below 2.5V. Replace with a brand-new CR123A 3.0V Lithium INDUSTRIAL cell immediately.
  2. System memory capacity per lock: 10 pcs Manager Cards, 10 pcs Delete Cards, and 30 pcs User Cards.
  3. Always install brand-new, premium 3V CR123A lithium batteries. Expected battery lifetime: 6–12 months. Never use 3.7V rechargeable cells.
  4. Verify full lock actuation, ensure battery installation, and enroll all credentials BEFORE physically mounting the lock into the drawer or cabinet!

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