Pass box controller: Double-door interlocking + sterilization, key equipment for cleanroom transfer

I. Core Functions

Double-Door Interlock: Achieves forced interlocking of the two doors' opening and closing via mechanical or electronic means to prevent cross-contamination. For example, when the outer door is opened, the inner door automatically locks, and vice versa.

Sterilization Control: Integrates ultraviolet germicidal lamps, supporting manual or automatic modes. In automatic mode, the germicidal lamps activate after the door is closed, run for a preset time (e.g., 10-30 minutes), and then automatically shut off.

Air Shower Control: Some controllers are equipped with an air shower function, using a built-in fan to generate a high-speed airflow to remove dust from the surface of items, further reducing the risk of contamination.

Lighting and Status Indicators: Automatically illuminates the interior lighting when the door is opened and delays turning it off after the door is closed; indicator lights display the status of sterilization, air shower, and door lock for easy monitoring by operators.

Safety Protection: Includes an emergency stop button, allowing immediate shutdown of all functions and door unlocking in emergencies; some models support a buzzer alarm to indicate if the door is not closed or there is an operational error.

Safety Protection: Features an emergency stop button, allowing immediate shutdown of all functions and door unlocking in emergencies; some models support a buzzer alarm to indicate if the door is not closed or if there is an operational error.

II. Controller Types

By Control Method:

Mechanical Interlock Controller: Achieves door lock linkage through mechanical structures (such as linkages, latches), low cost but poor flexibility.

Electronic Interlock Controller: Uses electromagnetic locks, sensors, and circuit boards, supporting more functions (such as sterilization timing, remote monitoring), suitable for high-cleanliness requirements.

By Interface Type:

Button Controller: Operated via physical buttons, simple and durable, suitable for basic needs.

LCD/Touchscreen Controller: Provides a visual interface, supports parameter setting, status display, and fault diagnosis, suitable for complex process management.

III. Key Technical Parameters

Power Supply: Typically 220VAC, some models support lower voltages (such as 24VDC) to adapt to special environments.

Output Interface: Relay output (passive switching quantity), compatible with single-phase or three-phase fans (external contactor required).

Environmental Adaptability: Operating temperature range -10℃ to +40℃, relative humidity ≤80%, no corrosive gas environment.

Material and Protection: The controller housing is mostly made of stainless steel or cold-rolled steel plate with powder coating, achieving a dustproof and waterproof rating of IP54 or higher.

IV. Operation Method

Basic Operation Flow: Item Placement: Open the outer door, place the item, and close it. This triggers the air shower (if applicable) and sterilization program.

Item Removal: Unlock and open the inner door, remove the item, and close it to complete the transfer cycle.

Emergency Handling: Press the emergency stop button. All functions stop, and the door unlocks for quick handling of any abnormalities.

Advanced Function Settings (Taking an electronic controller as an example):

Sterilization Time Adjustment: Set the sterilization duration (0-999 minutes) via buttons or the touchscreen.

Air Shower Parameter Configuration: Adjust the fan speed, air shower time, and countdown display.

Interlock Mode Switching: Select normally open/normally closed mode to adapt to different logistics needs.