Bosch SDI2 8 Output Expansion Module (B308)

The B308 can interface with
building components such as HVAC, door lock
releases, and stairwell pressurization for complete
system control and monitoring.
Industrial, commercial, and institutional facilities are
typical installations for the B308 module. The eight onboard outputs can be programmed to activate on
system alarm, system trouble, individual zone or point
faults, and through remote control by authorized
users.

•  Programmable output functions
•  Easy to read switch addressing
•  Provides eight Form C relays
•  1 A at 5-24 VDC relay contact rating
• Allows remote control of outputs

Technical specifications
Properties
Dimensions 2.9 in x 5.0 in x 0.60 in
(7.35 cm x 12.7 cm x 1.5 cm)
Weight 5 oz (0.14 kg)
Environmental considerations
Relative humidity 5% to 93% at +32°C (+90°F)
Temperature (operating) 0°C to +49°C (+32°F to +120°F)
Power requirements
Current (maximum) Alarm: 150 mA (22 mA for digital
section + 16 mA per energized relay)
Relay outputs Dry contacts rated for .001 to 1.0 A at
5 to 24 VDC (resistive load).
Voltage 12 VDC nominal
Wiring
Terminal wire size 12 AWG to 22 AWG (2.0 mm to 0.65
mm)
SDI2 wiring Maximum distance – Wire size
(unshielded wire only):
400 ft (137 m) – 22 AWG (0.65 mm)
1000 ft (305 m) – 18 AWG (1.02 mm)