Bell 2 Door Switching Unit for Multi-Door Systems

Bell 719S 2 Door Switching Unit for Multi-Entrance Systems

The Bell 719S is a 2 door switching unit that enables a door entry telephone system to operate from two separate entrances. Multiple 719S units can be daisy-chained to extend operation up to a maximum of eight entrances. When a telephone is called from a given entrance, the switching unit connects the telephone to the speech unit of that panel only for a configurable period. Pressing the lock release button on the telephone operates the lock release at the calling door only. The unit is compatible with Bell 801 series DC telephones, 500 series telephones and BS-LX phones, supporting up to 20 telephones from a single PSU or up to 60 with an additional separate telephone supply. Ideal for apartment blocks, commercial premises and multi-entrance residential buildings.

Key Features

• 2 door switching per unit, expandable to 8 doors with additional units
• DIP switch selectable speech active time: 30, 60, 90 or 120 seconds
• DIP switch selectable lock release duration: 3, 5, 10 or 20 seconds
• Fail-secure lock output: same voltage as supply, 500 mA maximum
• Fail-safe lock output: DC only, 500 mA maximum
• Engaged lamp output: 100 mA maximum for caller indication at other doors
• Egress button and tradesman button inputs with time-clock support
• Door monitor switch/contact support for both doors (normally open or normally closed)
• 4 LED status indicators and 2 test buttons for fault diagnosis
• Compatible with 801, 801S, 801P, 801PS, 801-DESK, BS-LX and 500 series telephones
• Supports up to 60 telephones with additional M440 PSU
• Maximum unit spacing 2 metres apart in multi-door systems
• Made in the United Kingdom

Technical Specifications

• Supply voltage: 11.5V - 15V RMS 50 Hz AC or 11.5V - 15V DC
• Current draw AC: 590 mA maximum
• Current draw DC: 290 mA maximum
• Fail-secure lock output: 500 mA maximum
• Fail-safe lock output: 500 mA maximum (DC only)
• Engaged lamp output: 100 mA maximum
• Exit input: normally open contact (must be voltage free)
• Lock release duration: 3, 5, 10 or 20 seconds (DIP switch selectable)
• Speech active time: 30, 60, 90 or 120 seconds (DIP switch selectable)
• Number of doors: 2 per unit, maximum 8 per system
• Operating temperature: 0 to 50 degrees C
• Compatible AC PSU: M225 (12V AC 2A)
• Compatible DC PSU: M440 (12V DC 2A)
• Cable type: 0.5 mm solid core twisted-pair (e.g. CW1308)
• Certifications: CE

Dimensions

• 238 x 189 x 50 mm (H x W x D) boxed
• 177 x 137 x 18 mm (H x W x D) PCB only