Trane TR200 Startup Procedure page 43

Digital Outputs
• Parameter 5-01 selects terminal 27 as DI or DO
• Parameter 5-02 selects terminal 29 as DI or DO
• Parameters 5-30 and 5-31 set function
• Digital outputs supply +24 VDC in PNP mode
• If P 5-00 is set to NPN, common side of the DOs must go to 12