Trane N512, Zone Controller manual Binary outputs, Generic binary output, Binary output functions

Binary outputs

Binary outputs

The ZN521 zone controller supports fan coil, blower coil, and unit ventila- tor applications that may include the following components:

•Supply fan with up to three speeds

•Hydronic cooling and/or heating coils with two-position or tri-state modulating control valve

•DX cooling (single stage)

•Electric heat (single stage or two stage)

•Baseboard heat (single stage)

•Tri-state modulating outdoor/return air damper

•Tri-state modulating face-and-bypass damper

The Tracer ZN521 controller includes ten binary outputs. Each binary output is a triac with a rating of 12 VA at 24 Vac. Table 6 describes the function of each output.

Table 6: Binary output functions

Binary output	Functions
1	• Fan high
2	• Fan medium
	• Exhaust fan or damper
3	• Fan low
4	• Modulating cooling/changeover valve, open
	• Two-position cooling/changeover valve
	• DX cooling
5	• Modulating cooling/changeover valve, close
	• Face-and-bypass damper, open to face
6	• Modulating heating valve, open
	• Two-position heating valve
	• Electric heat, stage 1
7	• Modulating heating valve, close
	• Face-and-bypass damper, close (bypass)
	• Electric heat, stage 2
8	• Outdoor air damper, open (return air damper, close)
9	• Outdoor air damper, close (return air damper, open)
10	• Baseboard heat
	• Generic

Generic binary output

Binary output 10 is the only output that can be configured as a generic binary output. When configured as a generic binary output, it can be con- trolled only by a BAS, and has no direct effect on Tracer ZN521 operation.

CNT-SVX07C-EN 21