Technical Specifications

B520

• Provides 2 A or 12 V emergency power for fire and burglar applications (4 A burglar alarm current)
• Number of batteries: 2 x 12 V 7-18 Ah each (maximum capacity = 36 Ah)
• Emergency power: up to 80 hours
• Simplified addressing via switch
• Uses standard Bosch TR1850 plug-in transformer
• Dimensions: 4.5 x 6.94 x 1.15 in. (11.43 x 17.62 x 2.9 cm)
• Operating temperature: +32°F to +120°F (0 to 49°C)
• Current: 
  • Input: 18 Vac, 50 VA
  • Output: 2 – 4 A
• Voltage: 11.5 – 12.2 Vdc

TR1850-CA

• For Canada
• Current: 
  • Input: 120 VAC
  • Output: 18 VAC, 50 VA
• Power frequency: 60 Hz

B8103

• Weight: 10 lb (4.5 kg)
• Dimensions: 16 x 16 x 3.5 in (41 cm x 41 cm x 9 cm) 
• Color: white
• Material: cold-rolled steel

B12

• Weight: 0.8 lb (0.35 kg)
• Dimensions: 9.25 x 8.63 x 0.5 in (23.5 cm x 21.92 cm x 1.27 cm)
• Color: gray
• Material: 1.0 mm (20 gauge) cold rolled steel