C-TEC 24V 5A Isolatable Relay on a Plate c/w Buzzer (BF366)

The C-TEC BF366 is a 24V 5A polarised relay on a plate for 24V fire alarm systems. A keyswitch lets the relay be temporarily isolated during routine testing and maintenance, so that equipment such as autodiallers, sprinklers or roller shutters does not operate. While isolated, a warning beeper sounds so the unit is not left isolated by mistake.

Key features

• 24V 5A polarised relay for fire alarm systems
• Keyswitch isolation for test and maintenance
• When isolated, the Isolated LED flashes and a warning beeper sounds every 8 seconds
• Can be triggered from a control panel's open collector output or from a standard polarised fire alarm sounder circuit
• Red Activated and amber Isolated LEDs
• Fits standard UK 25mm flush or surface back boxes

Technical specifications

• Part number: BF366
• Input coil voltage: 17 to 30V DC
• Activation current: typically 30mA at 24V DC
• Contact rating at 24V DC: 5A resistive, 2A inductive
• Contact rating at 240V AC: 5A resistive, 2A inductive
• Contacts: NC, C, NO
• Controls: isolating keyswitch
• Dimensions: 85mm (W) x 85mm (H) x 50mm (D)
• Construction: white PVC plate, grey label, silver nickel contacts
• IP rating: IP40
• Weight: 112g
• Operating temperature: -10°C to +60°C

Note: when triggered from a sounder circuit, the relay returns to normal when the fire condition is cleared or silenced. Check with the approving authority that this is acceptable before installation.