Filter
Top Products
Figure 5.8: Transformer Connections
Primary:
YE yellow WH white
BK black
Option bus wiring requirements
Use 18 AWG (1.2 mm) or larger wire to connect option bus devices to the FACP. The total
length of wire connected to the option bus terminals must not exceed 4 000 ft (1 219 m),
regardless of the wire gauge wire used.
i
Notice!
Shared cable is not recommended for option bus, addressable points bus, telephone, or NAC
wiring.
i
Notice!
To comply with UL, do not share supplementary devices with primary device on the option
bus.
Avoid shielded or twisted pair-wire except for special applications where a reduced length of
wiring (approximately 50%) is acceptable for tolerating a harsh electrical environment.
The length of wire allowed between the control panel and the last device on a wiring run
depends on the existing current draw on that wiring run. Reducing the number of devices on a
wiring run allows the individual runs to be longer.
5.3
34 en | Connection Fire Alarm Control Panels
2012.08 | 04 | F01U008458 Installation and Operation Manual Bosch Security System, Inc.