Installing the BACnet GW-3 Board BACnet GW-3 Embedded Installation
21BACnet Gateway-3 Installation and Operation Manual - P/N: 53372:Rev: A 5/6/09
Figure 2.6 BACnet GW-3 Power Connection
For specific information about power configurations involving fire alarm control panels and
network communications modules, refer to Embedded Gateway Power Connections, PN 53600.
2.5.2 Wiring Restrictions
RS232 (NUP)
• Line Impedance 5k ohm
• Max Distance 50 feet
Ethernet
• Line Impedance 100 ohm
• Max Distance 100 meters
24 V IN
TB1
NOTE: All wiring from the power supply is power limited, and a separation of at least ¼” (6.35
mm) must be maintained between power limited and non-power limited wiring.
!
CAUTION: Power Sources
Different sources of power are used in conjunction with the BACnet GW-3 product. Disconnect all
sources of power before servicing. This device and associated equipment may be damaged by
removing and/or inserting cards, modules or interconnecting cables while this unit is powered. This
damage may adversely affect the operation of this unit, but its effect may not be readily apparent.
NOTE: All wiring connections are supervised and power limited.
NOTE: USB and NUP wiring connections to the HS-NCM must be located within 20 feet and
encased in conduit within the same room.
NOTE: In Canada, if the gateway is installed in a separate cabinet, the cabinet must be
connected to the Fire Alarm Control Panel (FACP) with a close nipple fitting.
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