Binary outputs, Generic binary output | Trane N512, Zone Controller

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

Image 31

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

Contents

Installation and Operation Tracer ZN521 Zone Controller Page CNT-SVX07C-EN April CNT-SVX07C-EN Tracer ZN521 Zone Controller Installation and Operation CNT-SVX07C-EN Contents Sequence of operations Status indicators for operation and communication Troubleshooting Index Product description Overview and specifications Storage environment DimensionsClearances Plastic-cover model dimensions and clearances Additional components Agency listing/compliance CO2 sensor Tracer zone temperature sensor optionsDamper actuators Zone humidity sensor Overview and specifications AC-power wiring Input/output terminal wiring General wiring information Communication-link wiring and addressing General wiring information Operating environment requirements Location recommendations Mounting the Tracer ZN521 zone controller Mounting recommendations HeatElectric Typical applications for the Tracer ZN521 zone controllerApplication SpeedfanMultiple Dehumidification ControlValve Economizing Binary inputs BI1 Low-coil-temperature detectionBinary inputs BI2 Condensate overflow BI4 Fan status BI3 Occupancy or generic binary input Analog inputs ZN Zone temperatureAnalog inputs GND Ground terminals AI1 Entering water temperature FAN Fan mode inputSET Local setpoint AI3 Outdoor air temperature or generic temperature AI2 Discharge air temperature Configuration Measurement range AI4 configuration options and associated measurement rangesAI4 Universal 4-20 mA AI4 terminal wiring CO2 measurement Binary output Functions Binary outputsGeneric binary output Binary output functions Function Input source For more information See Wiring requirements and optionsOverriding binary outputs Required controller inputs for proper operation Two-pipe hydronic-cooling unit Two-pipe hydronic-heating unit Two-pipe hydronic heating/cooling unit with auto changeover Four-pipe hydronic heating/cooling unit Four-pipe heating/cooling unit with auto changeover Two-pipe heating unit with DX cooling Electric heat unit with DX cooling Electric heat unit Two-pipe heating unit with face-and-bypass damper Two-pipe heating/cooling unit with face-and-bypass damper Four-pipe heating/cooling unit with face-and-bypass damper Input/output functions and wiring for typical applications Random start Power-up sequence Occupancy modes Occupied modeUnoccupied mode Occupied standby mode Timed override control Occupied bypass mode Cascade zone control Zone temperature controlSimplified zone control Morning cool-down Heating or cooling modeDischarge air tempering Morning warm-up Fan operation Entering water temperature sampling function Exhaust control Exhaust control Valve control options Valve operationModulating valve operation Modulating valve calibration Two-pipe operation Modulating outdoor/return air dampersTwo-position valve operation Isolation-valve operation Modulating outdoor air damper position Ashrae Cycle 2 conformance Ashrae Cycle 1 conformanceEconomizing free cooling Face-and-bypass, isolation-valve operation Two-position control of a modulating outdoor air damperFace-and-bypass damper operation DX cooling operation Baseboard heat operation Electric heat operationDehumidification Unit protection strategies Peer-to-peer communication Condensate overflow Smart resetLow-coil-temperature protection Fan off delay Freeze protection discharge air temperature low limit Filter-maintenance timerFreeze avoidance Tracer ZN521 zone controller circuit board Test button Manual output test Output For non Close damper, air Outdoor Open damper, air Outdoor BOP1 BOP2 BOP3 BOP4 BOP5 BOP6 BOP7 BOP8 BOP9 Step Result LED activity Explanation Service pin buttonRed LED Service indicator Interpreting LEDs Yellow LED Communications indicator Green LED Status indicator Types of diagnostics Diagnostics Fan unaffected Table of diagnosticsDiagnostics Diagnostic Probable cause Consequences Type Position Valved unaffected Damper unaffected Status indicators for operation and communication Probable cause Explanation Fan does not energize Valves remain closed Troubleshooting DX or electric heat does not energize Valves remain open Outdoor air damper remains open Outdoor air damper remains closed Outdoor air damper remains open Troubleshooting Numerics Index Index Index Index Page Trane