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POINT NAME
DEDICATED INPUTS
Space Temp / Zone Temp
Supply Air Temperature
Outside Air Temperature
Space Temperature Offset Pot
Safety Chain Feedback
(1)
Compressor Safety Status
Fire Shutdown Status
Enthalpy Status
Humidistat Input Status
Zone Temperature
CONFIGURABLE INPUTS
(4)
Indoor Air CO
2
Outdoor Air CO
2
Space Relative Humidity
Supply Fan Status
(2)
Filter Status
(2)
(2)
Door Contact
Remote Occupancy input
(2)
(2)
IGC input
OUTPUTS
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
BI
— Binary Input
BO
— Binary Output
(1)Safety Chain Feedback: 24Vac required at this terminal to provide
"Run Enable" status. See Input/Output section for additional instruc-
tions.
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 48HC 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 10k 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 ship-
ping position. Remove the sensor for installation. Re-position
the sensor in the flange of the supply-air opening or in the sup-
ply air duct (as required by local codes). Drill or punch a
Table 28 — RTU Open Controller Inputs and Outputs
BACNET OBJECT
TYPE OF I/O
NAME
zone_temp
AI (10K Thermistor)
sa_temp
AI (10K Thermistor)
oa_temp
AI (10K Thermistor)
stpt_adj_offset
AI (100K Potentiometer)
safety_status
BI (24 VAC)
comp_status
BI (24 VAC)
firedown_status
BI (24 VAC)
enthalpy_status
BI (24 VAC)
humstat_status
BI (24 VAC)
N/A
N/A
iaq
AI (4-20 mA)
oaq
AI (4-20 mA)
space_rh
AI (4-20 mA)
sfan_status
BI (24 VAC)
filter_status
BI (24 VAC)
door_contact_status BI (24 VAC)
occ_contact_status BI (24 VAC)
igcovr_status
BI (24 VAC)
econ_output
AO (4-0mA)
vfd_output
AO (2-10Vdc)
sfan
BO Relay (24VAC, 1A)
comp_1
BO Relay (24VAC, 1A)
comp_2
BO Relay (24VAC, 1A)
comp_3
BO Relay (24VAC, 1A)
heat_1
BO Relay (24VAC, 1A)
heat_2
BO Relay (24VAC, 1A)
pexh
BO Relay (24VAC, 1A)
dehum
BO Relay (24VAC, 1A)
CONNECTION PIN
NUMBER(S)
J20—1 & 2
J2—1 & 2
J2—3 & 4
J20—3 & 4
J1—9
J1—2
J1—10
J2—6 & 7
J5—7 & 8
J13—1—4
J4—2 & 3 or J4—5 & 6
J5—1 & 2 or J5—3 & 4,
J5—5 & 6 or J5—7 & 8
J2—5
J22—1 & 2
J1—4
J1—8
J1— 7
J11—5 & 6
J1—6
J1—5
J11—2 & 3 (N.O.)
J11—7 & 8 (N.O.)
(2)These inputs are configurable. If installed, they take the place of
the default input on the specific channel. See appropriate Input Con-
figuration Section for wiring and setup instructions.
(3)Parallel pins J5—1 = J2—6, J5—3 = J1—10, J5—5 = J1—2 are
used for field installation.
(4)Refer to the input configuration and accessory sections of the
RTU Open Multi-Protocol Controller Controls, Start -Up, Operation
and Troubleshooting manual for more detail.
1
/
-in. hole in the flange or duct. Use two field-supplied, self-
2
drilling screws to secure the sensor probe in a horizontal orien-
tation. See Fig. 53.
OUTDOOR AIR TEMPERATURE (OAT) SENSOR —
The OAT is factory-mounted in the EconoMi$er
accessory). It is a nominal 10k ohm thermistor attached to an
eyelet mounting ring.
ECONOMI$ER 2 — The RTU Open controller is used with
EconoMi$er 2 (factory-installed option or field-installed acces-
sory) for outdoor air management. The damper position is con-
trolled directly by the RTU Open controller; EconoMi$er 2 has
no internal logic device.
54
CHANNEL DESIGNATION
Analog Input 10
Analog Input 6
Analog Input 7
Analog Input 11
Binary Input 4
Binary Input 3
Binary Input 5
Binary Input 8
Binary Input 9
Rnet
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
(3)
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.
Analog Output 1
Analog Output 2
Binary Output 1 (G)
Binary Output 5 (Y1)
Binary Output 4 (Y2)
Binary Output 7 (Y3)
Binary Output 3 (W1)
Binary Output 2 (W2)
Binary Output 8 (PE)
Binary Output 6
®
2 (FIOP or
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