Table 8 – RTU Open Controller Inputs and Outputs
|
| POINT NAME | BACnet OBJECT |
| TYPE OF I/O | CONNECTION PIN |
|
| NAME |
| NUMBER(S) | ||
|
|
|
|
| ||
|
|
| DEDICATED INPUTS |
| ||
Space Temp / Zone Temp | zone_temp |
| AI (10K Thermistor) | |||
Supply Air Temperature | sa_temp |
| AI (10K Thermistor) | |||
Outdoor Air Temperature | oa_temp |
| AI (10K Thermistor) | |||
Space Temperature Offset Pot | stpt_adj_offset |
| AI (100K Potentiometer) | |||
Safety Chain Feedback | safety_status |
| DI (24 VAC) | |||
Compressor Safety Status | comp_status |
| DI (24 VAC) | |||
Fire Shutdown Status | firedown_status |
| DI (24 VAC) | |||
Enthalpy Status | enthalpy_status |
| DI (24 VAC) | |||
Humidistat Input Status | humstat_status |
| DI (24 VAC) | |||
|
|
| CONFIGURABLE INPUTS |
| ||
Indoor Air CO2 | iaq |
| AI |
| ||
Outdoor Air CO2 | oaq |
| AI | |||
Space Relative Humidity | space_rh |
| AI |
| ||
Supply Fan Status* | sfan_status |
| DI (24 VAC) |
| ||
Filter Status* | filter_status |
| DI (24 VAC) | |||
Door Contact Input* | door_contact_status |
| DI (24 VAC) | J5 5 or | ||
Occupancy Contact* | occ_contact_status |
| DI (24 VAC) |
| ||
|
|
| OUTPUTS |
|
| |
Economizer Output | econ_output |
| AO | |||
Supply Fan Relay State | sfan |
| DO Relay (24VAC , 1A) | |||
Compressor 1 Relay State | comp_1 |
| DO Relay (24VAC , 1A) | |||
Compressor 2 Relay State | comp_2 |
| DO Relay (24VAC , 1A) | |||
Heat Stage 1 Relay State | heat_1 |
| DO Relay (24VAC , 1A) | |||
Heat Stage 2 Relay State | heat_2 |
| DO Relay (24VAC , 1A) | |||
Power Exhaust Relay State | pexh |
| DO Relay (24VAC , 1A) | |||
Dehumidification Relay State | dehum |
| DO Relay (24VAC, 1A) | |||
LEGEND |
|
|
|
|
| |
AI | Analog Input |
|
|
|
| |
AO | Analog Output |
|
|
|
| |
DI | Discrete Input |
|
|
|
| |
DO | Discrete Output |
|
|
|
|
*These inputs (if installed) take the place of the default input on the specific channel according to schematic. Parallel pins
48TC**16
The RTU Open controller requires the use of a Carrier space sensor. A standard thermostat cannot be used with the RTU Open system.
Supply Air Temperature (SAT) Sensor —
On
a
The SAT is
Outdoor Air Temperature (OAT) Sensor —
The OAT is
EconoMi$er2 —
The RTU Open control is used with EconoMi$er2 (option or accessory) for outdoor air management. The damper position is controlled directly by the RTU Open control; EconoMi$er2 has no internal logic device.
Outdoor air management functions can be enhanced with
Enthalpy control (outdoor air or differential sensors) Space CO2 sensor
Outdoor air CO2 sensor
Field Connections
Field connections for accessory sensors and input devices are made the RTU Open, at plugs J1, J2, J4, J5, J11 and J20. All field control wiring that connects to the RTU Open must be routed as shown in Fig. 39. This routing provides the UL required clearance between high- and
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