Fermax BUS2 Relay Module with Configurable Activation

Fermax F-3247 BUS2 Relay Module with Configurable Activation

The Fermax F-3247 is a BUS2 system relay module providing a volt-free relay output with configurable activation and operating modes. It installs at an intermediate point on the BUS2 bus without additional cabling, allowing relay activation via commands from apartment terminals, door panels, or external contacts. The module supports timer mode (1 to 600 seconds) and toggle/bistable mode, with programmable BUS2 addresses for selective device response.

Key Features

• Volt-free relay contacts (C, NO, NC) rated 5A max
• Configurable activation via DSW2 commands: concierge call, auto-start, F1/F2 activation, door release, panel call
• Timer mode programmable from 1 to 600 seconds
• Toggle/bistable mode available
• External activation via ACT/EXT terminal
• Relay disable function via INHAB/DISABLE terminal
• Programmable BUS2 addresses (1-199) for selective device response
• ALL or PRG mode for responding to all devices or only programmed devices
• 12 Vdc auxiliary output
• BUS2 tester connection point
• No additional cabling required — installs inline on BUS2 bus

Technical Specifications

• Supply voltage: 24 Vdc
• Current draw: 33 mA (activated)
• Operating temperature: 0 to +50 degrees C
• Dimensions: 86 x 89 x 26 mm
• Relay contact max voltage: 30 Vdc / 220 Vac
• Relay contact max current: 5 A
• Relay contacts: C, NO, NC (volt-free)
• Auxiliary output: +12 Vdc
• Programmable addresses: 1 to 199
• Timer range: 1 to 600 seconds
• Mounting: intermediate point on BUS2 bus (not at end of trunk line)
• Certifications: CE