Product Description
The ANWETECH AT-F327 Conventional Maintenance Switch is designed for fire alarm and releasing systems where a safe maintenance mode is required. During inspection, testing or servicing, the key switch can isolate the actuation circuit to reduce the risk of unintended extinguishing agent release or accidental actuation of the release circuit.
The front panel provides two clear status indications: SYSTEM ARMED and SYSTEM INACTIVE, helping technicians and operators confirm the current condition of the system at a glance. According to the supplied reference design, the key is normally removable in the SYSTEM ARMED position, while an alternative version is available with key removal in both positions.
Mounted on a two-gang stainless steel plate, AT-F327 offers a clean front layout, durable construction and standard dry-contact switching through NC / C / NO terminals. It is suitable for fire alarm systems, releasing panels and extinguishing systems that require a dedicated maintenance isolation switch.
Key Features
- Conventional maintenance switch for fire alarm and releasing systems
- Key switch disconnects actuation circuit during maintenance
- Helps prevent accidental extinguishing or release during service work
- Two front-panel status indications: SYSTEM ARMED / SYSTEM INACTIVE
- Dry contact switching through NC / C / NO terminals
- Two-gang stainless steel mounting plate
- Suitable for extinguishing panels, release circuits and fire alarm maintenance applications
- Clear field identification and simple operation
- Key-operated control for authorized maintenance procedures
Technical Specifications
| Item |
Specification |
| Model |
AT-F327 |
| Product Name |
Conventional Maintenance Switch |
| Function |
Disconnects actuation circuits during maintenance to help prevent accidental discharge |
| Switch Rating |
5A at 250VAC |
| DC Rating |
5A up to 30VDC |
| LED Rating |
10mA each; total current draw 20mA |
| Status Indication |
SYSTEM ARMED / SYSTEM INACTIVE |
| Contact Output |
NC / C / NO |
| Reference Power Marking |
Black: -24VDC; Red: +24VDC |
| Mounting |
Two-gang stainless plate |
Operating Description
- Insert the key into the switch before performing maintenance work.
- Turn the key toward SYSTEM INACTIVE to isolate the actuation circuit during service work.
- Carry out the required inspection, testing or maintenance while the system remains inactive.
- After maintenance, return the switch to SYSTEM ARMED and verify the front-panel status indication.
- Confirm the permitted key-removal position of the delivered unit before final handover.
Installation Notes
- Check supply polarity and terminal identification before wiring.
- Ensure the switch contact rating is suitable for the connected circuit.
- Use the NC / C / NO terminals according to the required system logic.
- After maintenance, return the switch to SYSTEM ARMED and confirm normal system status.
- Carry out a functional test after installation and after any maintenance activity.
Applications
- Fire alarm systems
- Releasing systems
- Gas extinguishing systems
- Fire suppression maintenance isolation circuits
- Extinguishing control panels
- Industrial fire protection systems
- Commercial building fire alarm maintenance stations
