Master-Slave Unit Wiring Connection - Trane RTXC-XE Series Installation, Operation And Maintenance Manual

BACnet Communications Interface (BCI-C)

Master-Slave Unit Wiring Connection

RTXC-SVX003D-EN
Symbio 800 provides an optional BACnet Communications Interface (BCI-C) between the unit and
a Building Automation System (BAS).
See Trane wiring diagrams for details.
(RTXC 310/330/360/400/440XE, 310/330/360/400/440/500/560XE-HSE units)
RTXC-XE/XE-HSE units have installed the modules of unit status. The Master-Slave unit operation
is conducted by the wired connection among Unit Running/Stop Output module 1A26, External
Auto/Stop module 1A14 and Heating/Cooling Mode Setting module 1A19.
• Connect the 1A26-J2-6 of Master unit to 1A19-J2-3 of Slave unit.
• Connect the 1A26-J2-4 of Master unit to 1A19-J2-4 of Slave unit.
• Connect the 1A26-J2-3 of Master unit to 1A14-J2-1 of Slave unit.
• Connect the 1A26-J2-1 of Master unit to 1A14-J2-2 of Slave unit.
Remove the jumpers W3 which are on terminal 1X5-44 and 1X5-45(XE unit)/ 1X5-46 and 1X5-
47(XE-HSE unit) for both Master and Slave units.
• Connect the terminal 1X5-42 of Master unit to terminal 1X5-44 of Slave unit(XE unit).
• Connect the terminal 1X5-43 of Master unit to terminal 1X5-45 of Slave unit(XE unit).
• Connect the terminal 1X5-48 of Master unit to terminal 1X5-46 of Slave unit(XE-HSE unit).
• Connect the terminal 1X5-49 of Master unit to terminal 1X5-47 of Slave unit(XE-HSE unit).
See Trane wiring diagrams for details.
Master-Slave unit setpoints notes:
1. Configure the same chilled/hot water setpoint for both Master and Slave units.
2. Set the Slave unit as Auto and Cooling mode.
Important: When set the Master unit as Auto mode, the Slave unit still can operate
independently.
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