Db-25 Connector Pin Assignments - Trane Tracer Summit Hardware And Software Installation Manual

Chapter 6 Network Wiring
BACnet device
Receive data pin assignment (input)
Transmit data pin assignment (output)
Signal ground pin assignment
174

DB-25 Connector Pin Assignments

Figure 82 provides the DB-25 pin assignments for a BACnet device and a
Tracer Summit BCU.
Figure 82: DB-25 connector cable pin connections
Tracer Summit BCU
EIA-232 card with 25-pin
male connector
Pin 2 = Transmit data (output)
Pin 3 = Receive data (input)
Pin 7 = Signal ground
Pin 4 = RTS
Pin 8 = DCD
BMTW-SVN01F-EN
Jumpered