Table 8 - RTU Open Controller Inputs and Outputs
CONNECTION PIN L
BACnet OBJECT TYPE OF I/O CHANNEL DESIGNATION
POINT NAME NAME NUMBER(S)
DEDICATED INPUTS
Space Temp / Zone Temp zone temp AI (10K Thermistor) J20-1 & 2 Analog Input 10
Supply Air Temperature sa temp AI (10K Thermistor) J2-1 & 2 Analog Input 6
Outside Air Temperature ca temp AI (10K Thermistor) J2- 3 & 4 Analog Input 7
Space Temperature Offset Pot stpt adj offset AI (100K Potentiometer) J20- 3 & 4 Analog Input 11
Safety Chain Feedback safety status BI (24 VAC) J1 -g Binary Input 4
Compressor Safety Status (1) comp status BI (24 VAC) J1-2 Binary Input 3
Fire Shutdown Status firedown status BI (24 VAC) J1 - 10 Binary Input 5
Enthalpy Status enthalpy status BI (24 VAC) J2-6 & 7 Binary Input 8
Humidistat Input Status humstat status BI (24 VAC) J5-7 & 8 Binary Input g
Zone Temperature n/a n/a J13-1 - 4 Rnet
CONFIGURABLE INPUTS (4)
Indoor Air CO2
Outdoor Air CO2
Space Relative Humidity
Supply Fan Status (2)
Filter Status (2)
Door Contact (2)
Remote Occupancy input (2)
IGC input (2)
Economizer Output
Supply Fan VFD
Supply Fan Relay
Cool 1 Relay State
Cool 2 Relay State
Cool 3 Relay State
Heat 1 Relay State
Heat 2 Relay State
Power Exhaust Relay State
Dehumidification Relay
LEGEND
AI - Analog Input
AO - Analog Output
DI - Discrete Input
DO - Discrete Output
iaq
oaq
space rh
sfan status
filter status
door contact status
occ contact status
igcovrstatus
AI (4-20 mA)
AI (4-20 mA)
AI (4-20 mA)
BI (24 VAC)
BI (24 VAC)
BI (24 VAC)
BI (24 VAC)
BI (24 VAC)
J4-2 & 3 or J4-5 & 6
J5-1 &2or J5-3 & 4,
J5-5 & 6 or J5-7 & 8 (3)
Analog Input 2
Analog Input 1
Analog Input 10
Binary Input 3, 5, 8, or 9, except where intrinsic input is used
Binary Input 3, 5, 8, or 9, except where intrinsic input is used
Binary Input 3, 5, 8, or 9, except where intrinsic input is used
Binary Input 3, 5, 8, or 9, except where intrinsic input is used
Binary Input 9. Mandatory input on gas heat units.
OUTPUTS
econ output AO (4-20mA) J2-5 Analog Output 1
vfd output AO (2-10Vdc) J22-1 & 2 Analog Output 2
sfan BO Relay (24VAC, 1A) J1-4 Binary Output 1 (G)
comp 1 BO Relay (24VAC, 1A) J1-8 Binary Output 5 (Y1)
comp 2 BO Relay (24VAC, 1A) J1-7 Binary Output 4 (Y2)
comp 3 BO Relay (24VAC, 1A) J11-5 & 6 Binary Output 7 (Y3)
heat 1 BO Relay (24VAC, 1A) J1 - 6 Binary Output 3 (W1)
heat 2 BO Relay (24VAC, 1A) J1-5 Binary Output 2 (W2)
pexh BO Relay (24VAC, 1A) J11-2 & 3 (N.O.) Binary Output 8 (PE)
dehum BO Relay (24VAC, 1A) J11-7 & 8 (N.O.) Binary Output 6
* These inputs (if installed) take the place of the default input on the specific channel according to schematic.
Parallel pins J5-1 = J2-6, J5-3 = J1-10, J5-5 = J1-2 are used for field-installation.
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 FIOP-equipped 50TC unit, the unit is supplied with a
supply-air temperature (SAT) sensor (33ZCSENSAT).
This sensor is a tubular probe type, approx 6-inches (152
mm) in length. It is a nominal 10-k ohm thermistor.
The SAT is factory-wired. The SAT probe is wire-tied to
the supply-air opening (on the horizontal opening end) in
its shipping position. Remove the sensor for installation.
Re-position the sensor in the flange of the supply-air
opening or in the supply air duct (as required by local
codes). Drill or punch a 1/2-in. hole in the flange or duct.
Use two field-supplied, self-drilling screws to secure the
sensor probe in a horizontal orientation. See Fig. 40.
Outdoor Air Temperature (OAT) Sensor --
The OAT is factory-mounted in the EconoMi$er2 (FIOP
or accessory). It is a nominal 10k ohm thermistor attached
to an eyelet mounting ring.
EconoMiSer2 --
The RTU Open control is used with EconoMi$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
field-installation of these accessory control devices:
Enthalpy control (outdoor air or differential sensors)
Space CO2 sensor
Outdoor air CO2 sensor
34
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