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Table 23 – RTU Open Controller Inputs and Outputs
POINT NAME
BACnet OBJECT
NAME
TYPE OF I/O
CONNECTION PIN
NUMBER(S)
CHANNEL DESIGNATION
DEDIC A T ED INPU TS
Space Temp / Zone Temp zone_temp AI (10K Therm is tor ) J 20 --- 1 a nd 2 Analog Input 10
Supply Air Temperatur e sa_temp AI (10K Ther m is t or) J 2 --- 1 a n d 2 Analog Inpu t 6
Ou t s id e Air Temper at u r e oa_temp AI (10K Ther m is tor ) J 2 --- 3 a n d 4 Analog Inpu t 7
Space Temperature Offset Pot stpt_adj_offset AI (100K Pot ent iomet er) J2 0 --- 3 a n d 4 Analog I nput 11
Safety Chain Feedback safety_status BI (24 VAC ) J 1 --- 9 Binar y Inp u t 4
Compressor Safety Status
(1)
comp_status BI (24 VAC ) J 1 --- 2 Binar y Inp u t 3
Fire Shutdown Status firedown_status BI (24 VAC) J 1 --- 1 0 Binary Inpu t 5
Ent h alp y Statu s enthalpy_status BI (24 VAC ) J 2 --- 6 and 7 Binar y Inp u t 8
Hum idistat Inpu t Status humstat_status BI (24 VAC) J 5 --- 7 a n d 8 Binar y Inpu t 9
Zone Temperature n/a n/a J 1 3 --- 1 --- 4 Rn et
CONFIGURABLE INPUTS
(4)
Indoor Air CO2 iaq A I ( 4 --- 2 0 mA )
J 4 --- 2 and 3 o r J 4 --- 5 a n d 6
Analog In put 2
Ou t d oor Air CO2 oaq A I (4 --- 2 0 mA ) Analog Input 1
Spac e Relative Humidity space_rh A I ( 4 --- 2 0 mA ) Analog Input 10
Supply Fan Status
(2)
sfan_status BI (24 VAC)
J 5 --- 1 and 2 o r J 5 --- 3 a n d 4,
J 5 --- 5 and 6 o r J 5 --- 7 a n d 8
(3)
BinaryInput3,5,8,or9,exceptwhereintrinsicinputisused
Filter Statu s
(2)
filter_status BI (24 VAC ) BinaryInput3,5,8,or9,exceptwhereintrinsicinputisused
Door Contac t
(2)
door_contact_status BI (24 VAC ) BinaryInput3,5,8,or9,exceptwhereintrinsicinputisused
Remote Occupancy input
(2)
occ_contact_status BI (24 VAC) BinaryInput3,5,8,or9,exceptwhereintrinsicinputisused
IGC input
(2)
igcovr_status BI (2 4 VAC) Binary I nput 9. Mandatory input on gas heat un its.
OUTPUTS
Economizer Ou t put econ_ou tpu t AO (4--- 20mA) J 2 --- 5 Analog Output 1
Supply Fan VFD vfd_output AO (2 --- 1 0 V d c ) J2 2 --- 1 a n d 2 Analog Ou tput 2
Supply Fan Relay sfan BO Relay (24VAC, 1A) J 1 --- 4 Binar y Out put 1 ( G )
Cool 1 Relay St at e comp_1 BO Relay (24VAC, 1A) J 1 --- 8 Binar y Out pu t 5 (Y1)
Cool 2 Relay St at e comp_2 BO Relay (24VAC, 1A) J 1 --- 7 Binar y Out pu t 4 (Y2)
Cool 3 Relay St at e comp_3 BO Relay (24VAC, 1A) J 1 1 --- 5 & 6 Bin ar y Out put 7 (Y3)
Heat 1 Relay Stat e heat_1 BO Relay (24VAC, 1A) J 1 --- 6 Binary Out pu t 3 (W1)
Heat 2 Relay Stat e heat_2 BO Relay (24VAC, 1A) J 1 --- 5 Binary Out pu t 2 (W2)
Power Exhaust Relay State pexh BO Relay (24VAC, 1A) J11---2and3(N.O.) Binary Out put 8 (PE)
Dehu m id ific at ion Relay dehum BO Relay (24VAC, 1A) J11---7and8(N.O.) Binary Outp u t 6
LEGEND
AI --- A n a l o g I n p u t
AO --- A n a l o g O u t p u t
BI --- B i n a r y I n p ut
BO --- Binary Output
(1)
Safety Chain Feedback: 24Vac required at this terminal to provide “Run Enable” status. See Input/Output section fo r additional instructions.
(2)
These inputs are configurable. If installed, they take the place of the default input on the specific channel. See appropriate Input Configuration Section for wiring and setup instructions.
(3)
P a r a l l e l p i ns J 5 --- 1 = J 2 --- 6 , J 5 --- 3 = J 1 --- 1 0 , J 5 --- 5 = J 1 --- 2 a r e u s e d f o r f i e l d i n s t a l l a t i o n.
(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.
The RTU Open controlle r re quires 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 50HC 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 shipping position. Remove the sensor for installati on.
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 orie ntation. See Fig. 52.
Outdoor Air Temperature (OAT) Sensor —
The OAT is factory--mounted in the EconoMi$er
R
2(FIOP
or accessory). It is a nominal 10k ohm thermistor attached
to an eyelet mounting ring.
EconoMi$e r2 —
The RTU Open controller is used with EconoMi$e r2
(factory--installed option or field--installed accessory) for
outdoor air management. The damper position is
controlled directly by the RTU Open controller; the
EconoMi$e r2 unit ha s no internal logic device.
Outdoor a ir management functions can be enhance d with
field--installation of these accessory control devices:
Enthalpy control (outdoor air or differentia l sensors)
Space CO
2
sensor
Outdoor air CO
2
sensor
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