Neptronic ARO24T User manual

ARO Series Universal Room Controller
Specification and Installation Instructions
ARO-IOM-171003 Page | 1
Models
Model # Temp RH CO2 VOC Networkable*
ARO24T ●
ARO24TH
● ●
ARO24TGH
● ● ●
ARO24TGVH
● ● ●
●
AROB24T ● ●
AROB24TH
● ●
●
AROB24TGH
● ● ●
●
AROB24TGVH
● ● ●
● ●
* Networkable: BACnet MS/TP or Modbus (selectable using menu)
Description
IAQ and ECM fan control applications made easy! Introducing the
new ARO series universal room controller with onboard CO
2
,
VOC, temperature and humidity sensors, selectable application
control profiles, up to 4 simultaneous control loops, and seamless
control of a 0-10 Vdc ECM fan. All of this in one wall-mounted
room controller.
The AROB series networkable controller operates over an RS‐485
network using the BACnet MS/TP or Modbus protocol to
exchange information with a Building Management System.
ARO Series
Features
Onboard Sensors
 Temperature sensor (°C/°F)
 Humidity sensor (%RH), select models
 VOC sensor (volatile organic compounds), select models
 Carbon dioxide sensor (CO
2
), select models
Functions
 Built-in application profiles to automatically configure the
controller for the selected application.
 Up to 4 simultaneous control loops capable of controlling, in
real time:
o Humidification and Dehumidification
o Heating and Cooling
o CO
2
levels
o VOC levels
o Integrated EC fan control mode
 Display or hide all the required access for user interaction
 Backlit LCD with simple icon and text-driven menus
 Selectable Fahrenheit or Celsius scale
 Precise temperature control with programmable PI function
 Independent cool and heat setpoint for No Occupancy
Network Communication
(AROB series only)
 BACnet
®
MS/TP or Modbus communication port
(selectable using menu)
 Select MAC address using menu or network
 Automatic baud rate detection
BACnet®
 MS/TP at 9600, 19200, 38400, 57600 or 76800 bps
 Automatic device instance configuration
 Copy and broadcast configuration to other controllers
 Network service port through on-board mini USB connector
Modbus
 Modbus at 9600, 19200, 38400 or 57600 bps
 RTU Slave, 8 bits (configurable parity and stop bits)
 Connects to any Modbus master

ARO Series Universal Room Controller
Specification and Installation Instructions
www.neptronic.com Page | 2
Technical Specifications
Description ARO Series
Temperature Sensor
Setpoint range 10ºC to 40ºC [50ºF to 104ºF]
Control accuracy Temperature: ±0.4ºC [0.8ºF]
Display resolution ±0.1ºC [0.2ºF]
Humidity Sensor (select models)
Setpoint range 10 to 65%RH
Control accuracy ±3.5% RH
Display resolution 0.1%
CO2 Sensor (select models)
Operating principle Self-calibrating, Non-Dispersive Infrared (NDIR)
Sensor range 400 to 2000 ppm
Accuracy ±30 ppm ±3% of reading (Accuracy is defined after minimum 3 weeks of continuous operation)
Response time 2 minutes by 90%
V
OC Sensor (select models)
Operating principle Self-calibrating, Non-Dispersive Infrared (NDIR)
Sensor range 0-1000 ppb isobutylene equivalent tVOCs
Response time < 5 seconds for tVOC
Start up time 15 minutes
Other
Inputs 1 Analog input: 0-10Vdc, Thermistor (10k Type 3)
1 Binary input: digital input (dry contact)
Outputs 2 Binary outputs (BO1 and BO2), dry contracts 24Vac, 1A max 3A in-rush
2 Analog outputs (AO1 and AO2), 0 to 10Vdc configurable
BACnet BACnet
®
MS/TP @ 9600, 19200, 38400, 57600 or 76800 bps (B-ASC)
Modbus Modbus RTU slave @ 9600, 19200, 38400 or 57600. Selectable parity and stop bit configuration:
No parity, 2 stop bit | Even parity, 1 stop bit | Odd parity, 1 stop bit
Communication Connections 24 AWG twisted-shield cable (Belden 9841 or equivalent)
Electrical connection 0.8 mm
2
[18 AWG] minimum
Operating temperature 0ºC to 50ºC [32ºF to 122ºF]
Storage temperature -30ºC to 50ºC [-22ºF to 122ºF]
Relative humidity 5 to 95 % non-condensing
Enclosure protection IP 30 (EN 60529)
Weight 120 g. [0.25 lb]
Dimensions A = 2.85” | 73mm
B = 4.85” | 123mm
C = 1.00” | 24mm
D = 2.36” | 60mm
E = 3.27” | 83mm
Certifications Conforms to UL STD 873
Certified to CSA STD C22.2 No. 24-93
A
B
C
D
E
ºF / º C

ARO Series Universal Room Controller
Specification and Installation Instructions
www.neptronic.com Page | 3
Wiring
We strongly recommend to wire all controllers to a separate grounded transformer, and that transformer shall service only these
products. This precaution prevents interference with and possible damage to incompatible equipment.
Terminal Description Details
1 COM
2 24Vac / 24Vdc
3 COM for BO1 (ext 24V) If JP1 is set to A+B
4 Binary Output 1 (BO1)
5 COM for BO2 (ext 24V) If JP2 is set to A+B
6 Binary Output 2 (BO2)
7 COM
8 Analog Input (AI1)
9 COM
10 Binary Input 1 (BI1)
11 Analog Output 1 (AO1)
12 COM
13 Analog Output 2 (AO2)
14 BACnet/Modbus A+
15 BACnet/Modbus B-
Mounting Instructions
CAUTION: Remove power to avoid a risk of malfunction.
A. Remove the captive screw that is holding the base and the front cover of the unit together.
B. Lift the front cover of the unit to separate it from the base.
C. Pull all wires through the holes in the base.
D. Secure the base to the wall using wall anchors and screws (supplied). Make the appropriate connections.
E. Mount the control module on the base and secure using the screw.
PGM RUN
A
B
C
EOL
ABC
JP3
JP5
TB1
15
14
13
12
10
9
8
7
6
5
4
3
1
2
11
ABC ABC
JP1
VOC sensor
CO2 sensor
For special applications
(Do not change JP1
and JP2)
Temperature and
humidity sensors
Avoid touching the VOC and
CO2 sensors as this may
cause incorrect readings
JP2
PGM RUNPGM RUN
Normal
operating mode
A
B
B
C
Configration
mode
End of line for
advanced networking
(Do not change JP5)
A
E
D
C
B

ARO Series Universal Room Controller
Specification and Installation Instructions
www.neptronic.com Page | 4
LCD Legend
Configuration Menu
Set the Mode Selector Jumper JP3 to the “PGM” mode (Programming Mode). For more information, see
Wiring on page 3. To exit, set the Jumper JP3 back to the “RUN” mode (Operation Mode). All changes are saved.
Step / Display Description Default Range
/
Offset Increment
1. App Profile Built-in application profiles automatically
configure the controller for the selected
application.
0 0 = None; advanced manual configuration
1 = Outside Air Applications (see page 13)
2 = Conference room (see page 14)
1
2. Intrn Temp Offset The display shows the temperature read
by the temperature sensor. Adjust the
offset by comparing it with a known value.
Current
value
32ºF to 122ºF / offset: ±9ºF
(0ºC to 50ºC / offset: ±5ºC)
0.2ºF
(0.1ºC)
3. Cool Setpnt Min The user cannot decrease the setpoint to
less than this value.
50ºF
(10ºC)
32ºF to 257ºF
(0ºC to 125ºC)
0.2ºF
(0.1ºC)
4. Cool Setpnt Max The user cannot increase the setpoint to
more than this value.
104ºF
(40ºC)
32ºF to 257ºF
(0ºC to 125ºC)
0.2ºF
(0.1ºC)
5. Cool Setpnt Cooling setpoint. 71.6ºF
(22.0ºC)
32ºF to 257ºF (see min and max value)
(0ºC to 125ºC)
0.2ºF
(0.1ºC)
6. Heat Setpnt Min The user cannot decrease the setpoint to
less than this value.
50ºF
(10ºC)
32ºF to 257ºF
(0ºC to 125ºC)
0.2ºF
(0.1ºC)
.
.
ppm FC
MAX
%
Networked Communication
Configuration Mode
Alarm or Error
CO2
System Mode (on/off)
VOC
Dehumidification
Cooling
Heating
Fan
NSB mode = Normal
OCC mode = Occupied
Humidification
.
.
NSB mode = Night Set Back Mode
OCC mode = Unoccupied
Automatic
Mode
Demand MAX
Indicates in “programming mode”
Setting value
Advance to next setting
Return to previous setting
Change value
Setting description (e.g. “App profil”)

ARO Series Universal Room Controller
Specification and Installation Instructions
www.neptronic.com Page | 5
Step / Display Description Default Range / Offset Increment
7. Heat Setpnt Max The user cannot increase the setpoint to
more than this value.
104ºF
(40ºC)
32ºF to 257ºF
(0ºC to 125ºC)
0.2ºF
(0.1ºC)
8. Heat Setpnt Heating setpoint. 68ºF
(20ºC)
32ºF to 257ºF (see min and max value)
(0ºC to 125ºC)
0.2ºF
(0.1ºC)
9. Temp Mode Temperature control mode that you want
to authorize to the user in operation mode.
OFF Auto (Automatic), CooL (Cooling Only),
OFF, HEAt (Heating Only)
--
Humidity Setpoints and User Control
The humidity and dehumidification settings appear only on models with the humidity sensor (see Models on page 1).
10. Humdty Offset The display shows the relative humidity
read by the humidity sensor. Adjust the
offset by comparing it with a known value.
Current
value
0% to 100% RH / Offset: ±5% 0.1% RH
11. Dehum setpnt Min The user cannot decrease the setpoint to
less than this value.
10% RH 0 to 100% RH 0.1% RH
12. Dehum Setpnt Max The user cannot increase the setpoint to
more than this value.
80% RH 0 to 100% RH 0.1% RH
13. Dehum setpnt Dehumidification setpoint. 60% RH 0 to 100% RH (see min and max value) 0.1% RH
14. hum setpnt Min The user cannot decrease the setpoint to
less than this value.
10% RH 0 to 100% RH 0.1% RH
15. hum Setpnt Max The user cannot increase the setpoint to
more than this value
80% RH 0 to 100% RH 0.1% RH
16. hum setpnt Humidification setpoint. 40% RH 0 to 100% RH (see min and max value) 0.1% RH
17. Humdty Mode Humidification control mode that you want
to authorize to the user in operation mode.
OFF OFF, hUn (Humidity Only), Auto
(Automatic), dhUn (Dehumidification Only)
--
CO2 Setpoints and User Control
The following CO2 settings appear only on models with the CO2 sensor (see Models on page 1).
18. CO2 Offset The display shows the CO2 level read by
the CO2 sensor. Adjust the offset by
comparing it with a known value.
Current
value
0 to 2000 PPM / Offset: ± 200 PPM 1 PPM
19. CO2 setpnt Min The user cannot decrease the setpoint to
less than this value.
400 PPM 0 to 2000 PPM
1 PPM
20. CO2Setpnt Max The user cannot increase the setpoint to
more than this value.
1500 PPM 0 to 2000 PPM
1 PPM
21. CO2 setpnt CO2 setpoint. 600 PPM 0 to 2000 PPM (see min and max value) 1 PPM
22. CO2 Mode Enable or disable CO2 operation mode. OFF ON or OFF --
VOC Setpoints and User Control
The following VOC settings appear only on models with the VOC sensor (see Models on page 1).
23. VOC Offset The display shows the VOC level read by
the VOC sensor. Adjust the offset by
comparing it with a known value.
Current
value
0 to 1000 PPB / Offset: ± 100 PPB 1 PPB
24. VOC setpnt Min The user cannot decrease the setpoint to
less than this value.
0 PPB 0 to 1000 PPB
1 PPB
25. VOC Setpnt Max The user cannot increase the setpoint to
more than this value.
1000 PPB 0 to 1000 PPB
1 PPB
26. VOC setpnt VOC setpoint. 800 PPB 0 to 1000 PPB (see min and max value) 1 PPB
27. VOC Mode Enable or disable VOC operation mode. OFF ON or OFF --
Fan Speed and User Control
28. FAN ON SPEED PERCNT The minimum fan speed when the fan
system mode is ON.
20% 0 to 100% 1%
29. FAN MODE Fan control mode you want to authorize to
the user in operation mode.
OFF OFF, Auto (Automatic), ON --

ARO Series Universal Room Controller
Specification and Installation Instructions
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Step / Display Description Default Range / Offset Increment
Analog Output 1 (AO1)
30. AO1 Min Volt Select the desired minimum voltage
(“zero” value) for the AO1 ramp.
0 V 0 to 10 V 0.1 V
31. AO1 Max Volt Select the desired maximum voltage
(“span” value) for the AO1 ramp.
10 V 0 to 10V 0.1 V
32. AO1 Mode Determines how the controller calculates
the AO1 ramp output value. The controller
compares all the enabled input demands
(steps 34 to 40) and uses the highest
demand or the average of all demands.
HIGH HIGH (Highest value) or
AvrG (Average of all values)
--
33. AO1 DIREV Direction of the analog signal: Direct (e.g.
0 to 10Vdc) or Reverse (e.g. 10 to 0Vdc).
Dir Dir (Direct) or rEv (Reverse) --
34. AO1 Fan Add fan to AO1 mode (step 32). OFF ON or OFF --
35. AO1 Cool Add cooling to AO1 mode (step 32). OFF ON or OFF --
36. AO1 Heat Add heating to AO1 mode (step 32). OFF ON or OFF --
37. AO1 Dehum Add dehumidification to AO1 mode (step
32).
OFF ON or OFF --
38. AO1 Hum Add humidification to AO1 mode (step 32). OFF ON or OFF --
39. AO1 Co2 Add CO2 to AO1 mode (step 32). OFF ON or OFF --
40. AO1 VOC Add VOC to AO1 mode (step 32). OFF ON or OFF --
Analog Output 2 (AO2)
41. AO2 Min Volt Select the desired minimum voltage
(“zero” value) for the AO2 ramp.
0 V 0 to 10 V 0.1 V
42. AO2 Max Volt Select the desired maximum voltage
(“span” value) for the AO2 ramp.
10 V 0 to 10V 0.1 V
43. AO2 Mode Determines how the controller calculates
the AO2 ramp output value. The controller
compares all the enabled input demands
(steps 45 to 51) and uses the highest
demand or the average of all demands.
HIGH HIGH (Highest value) or
AvrG (Average of all values)
--
44. AO2 DIREV Direction of the analog signal: Direct (e.g.
0 to 10Vdc) or Reverse (e.g. 10 to 0Vdc).
Dir Dir (Direct) or rEv (Reverse) --
45. AO2 Fan Add fan to AO2 mode (step 43). OFF ON or OFF --
46. AO2 Cool Add cooling to AO2 mode (step 43). OFF ON or OFF --
47. AO2 Heat Add heating to AO2 mode (step 43). OFF ON or OFF --
48. AO2 Dehum Add dehumidification to AO2 mode (step 43). OFF ON or OFF --
49. AO2 Hum Add humidification to AO2 mode (step 43). OFF ON or OFF --
50. AO2 Co2 Add CO2 to AO2 mode (step 43). OFF ON or OFF --
51. AO2 VOC Add VOC to AO2 mode (step 43). OFF ON or OFF --
Binary Output 1 (BO1)
52. BO1 Mode Determines how the controller calculates
the BO1 ramp output value. The controller
compares all the enabled input demands
(steps 59 to 65) and uses the highest
demand or the average of all demands.
HIGH HIGH (Highest value) or
AvrG (Average of all values)
--
53. BO1 DIREV Direction of the binary signal: NO
(Normally Open) or NC (Normally Closed).
NO NO (Normally open) or
NC (Normally closed)
--
54. BO1 TPM Hyst BO1 operates using hysteresis (step 57
and 58) or TPM (step 55).
HYST HYST (Hysteresis) or
TPM (Time proportional modulation)
--
55. BO1 TPM CPH If BO1 is set to TPM at step 54, select the
number of cycles per hour.
4 3, 4 or 8 CPH (Cycles per hour) --
56. BO1 Anti Cycle Sec Select the delay before activating or re-
activating the contact.
0 sec 0 to 300 sec 1 sec

ARO Series Universal Room Controller
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Step / Display Description Default Range / Offset Increment
57. BO1 Hyst Low Percnt If BO1 is set to HYST at step 54, select the
hysteresis low range percentage.
20% 0 to 100% 1%
58. BO1 Hyst High Percnt If BO1 is set to HYST at step 54, select the
hysteresis high range percentage.
80% 0 to 100% 1%
59. BO1 Fan Add fan to BO1 mode (step 52). OFF ON or OFF --
60. BO1 Cool Add cooling to BO1 mode (step 52). OFF ON or OFF --
61. BO1 Heat Add heating to BO1 mode (step 52). OFF ON or OFF --
62. BO1 Dehum Add dehumidification to BO1 mode (step 52). OFF ON or OFF --
63. BO1 Hum Add humidification to BO1 mode (step 52). OFF ON or OFF --
64. BO1 Co2 Add CO2 to BO1 mode (step 52). OFF ON or OFF --
65. BO1 VOC Add VOC to BO1 mode (step 52). OFF ON or OFF --
Binary Output 2 (BO2)
66. BO2 Mode Determines how the controller calculates
the BO2 ramp output value. The controller
compares all the enabled input values
(steps 73 to 79) and uses the highest
demand or the average of all demands.
HIGH HIGH (Highest value) or
AvrG (Average of all values)
--
67. BO2 DIREV Direction of the binary signal: NO
(Normally Open) or NC (Normally Closed).
NO NO (Normally open) or
NC (Normally closed)
--
68. BO2 TPM Hyst BO2 operates using hysteresis (step 71
and 72) or TPM (step 69).
HYST HYST (Hysteresis) or
TPM (Time proportional modulation)
--
69. BO2 TPM CPH If BO2 is set to TPM at step 68, select the
number of cycles per hour.
4 3, 4 or 8 CPH (Cycles per hour) --
70. BO2 Anti Cycle Sec Select the delay before activating or
re-activating the contact.
0 sec 0 to 300 sec 1 sec
71. BO2 Hyst Low Percnt If BO2 is set to HYST at step 68, select the
hysteresis low range percentage.
20% 0 to 100% 1%
72. BO2 Hyst High Percnt If BO2 is set to HYST at step 68, select the
hysteresis high range percentage.
80% 0 to 100% 1%
73. BO2 Fan Add fan to BO2 mode (step 66). OFF ON or OFF --
74. BO2 Cool Add cooling to BO2 mode (step 66). OFF ON or OFF --
75. BO2 Heat Add heating to BO2 mode (step 66) OFF ON or OFF --
76. BO2 Dehum Add dehumidification to BO2 mode (step 66). OFF ON or OFF --
77. BO2 Hum Add humidification to BO2 mode (step 66). OFF ON or OFF --
78. BO2 Co2 Add CO2 to BO2 mode (step 66). OFF ON or OFF --
79. BO2 VOC Add VOC to BO2 mode (step 66). OFF ON or OFF --
Analog and Binary Inputs (AI1 and BI1)
80. AI1 Mode Select the type of sensor and event
associated with input AI1.
OFF OFF (None), OAT (Outside Air
Temperature), OCC (Occupancy status),
nSb (Night set back status), dFt (Dirty
filter), FLS (Air Flow Switch), FLP (Air Flow
Protection/Lockout)
--
81. BI1 Mode Select the type of sensor and event
associated with input BI1.
OFF OFF (None), OCC (Occupancy status),
nSb (Night set back status), dFt (Dirty
filter), FLS (Air Flow switch), FLP (Air Flow
Protection/Lockout)
--
82. Extern Temp Offset The display shows the temperature read
by input AI1. Adjust the offset by
comparing it with a known value.
Current
value
-40ºF to 257ºF / offset: ±18ºF
(-40ºC to 125ºC / offset: ±10ºC)
0.2ºF
(0.1ºC)
Outside Air Temperature (OAT)
The following features apply only if OAT is selected for AI1 at step 80.
83. AO1 OAT Hi Temp AO1 no longer modulates and remains at
its minimum voltage if the OAT read at AI1
is higher than this value.
122ºF
(50ºC)
-40ºF to 257ºF
(-40ºC to 125ºC)
0.2ºF
(0.1ºC)

ARO Series Universal Room Controller
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Step / Display Description Default Range / Offset Increment
84. AO1 OAT Low Temp AO1 no longer modulates and remains at
its minimum voltage if the OAT read at AI1
is lower than this value.
-40ºF
(-40ºC)
-40ºF to 257ºF
(-40ºC to 125ºC)
0.2ºF
(0.1ºC)
85. AO2 OAT Hi Temp Same as step 83, except it applies to AO2. 122ºF
(50ºC)
-40ºF to 257ºF
(-400C to 1250C)
0.2ºF
(0.1ºC)
86. AO2 OAT Low Temp Same as step 84, except it applies to AO2. -40ºF
(-40ºC)
-40ºF to 257ºF
(-400C to 1250C)
0.2ºF
(0.1ºC)
87. BO1 OAT Hi Temp BO1 remains in its inactive or “normal”
state if the OAT read at AI1 is higher than
this value.
122ºF
(50ºC)
-40ºF to 257ºF
(-400C to 1250C)
0.2ºF
(0.1ºC)
88. BO1 OAT Low Temp BO1 remains in its inactive or “normal”
state if the OAT read at AI1 is lower than
this value.
-40ºF
(-40ºC)
-40ºF to 257ºF
(-400C to 1250C)
0.2ºF
(0.1ºC)
89. BO2 OAT Hi Temp Same as step 87, except it applies to BO2. 122ºF
(50ºC)
-40ºF to 257ºF
(-400C to 1250C)
0.2ºF
(0.1ºC)
90. BO2 OAT Low Temp Same as step 88, except it applies to BO2. -40ºF
(-40ºC)
-40ºF to 257ºF
(-400C to 1250C)
0.2ºF
(0.1ºC)
Occupied/Unoccupied Mode (OCC)
The following features apply only if OCC or NSB is selected for AI1 or BI1 at steps 80 or 81.
91. Unocc Cool Setpnt Min The user cannot decrease the unoccupied
cooling setpoint to less than this value.
50ºF
(10ºC)
32ºF to 257ºF
(0ºC to 125ºC)
0.2ºF
(0.1ºC)
92. Unocc Cool Setpnt Max The user cannot increase the unoccupied
cooling setpoint to more than this value.
104ºF
(40ºC)
32ºF to 257ºF
(0ºC to 125ºC)
0.2ºF
(0.1ºC)
93. Unocc Cool Setpnt Unoccupied cooling setpoint. 89.6ºF
(32ºC)
32ºF to 257ºF (see min and max value)
(0ºC to 125ºC)
0.2ºF
(0.1ºC)
94. Unocc Heat Setpnt Min The user cannot decrease the unoccupied
heating setpoint to less than this value.
50ºF
(10ºC)
32ºF to 257ºF
(0ºC to 125ºC)
0.2ºF
(0.1ºC)
95. Unocc Heat Setpnt Max The user cannot increase the unoccupied
heating setpoint to more than this value.
104ºF
(40ºC)
32ºF to 257ºF
(0ºC to 125ºC)
0.2ºF
(0.1ºC)
96. Unocc Heat Setpnt Unoccupied heating setpoint. 64.4ºF
(18.0ºC)
32ºF to 257ºF (see min and max value)
(0ºC to 125ºC)
0.2ºF
(0.1ºC)
Proportional Band and Integral Time
97. Cool P band Cooling ramp proportional band. 9ºF
5ºC
3.6ºF to 90ºF
2ºC to 50ºC
0.2ºF
(0.1ºC)
98. Heat P band Heating ramp proportional band. 9ºF
5ºC
3.6ºF to 90ºF
2ºC to 50ºC
0.2ºF
(0.1ºC)
99. Humdty P band Humidity ramp proportional band. 5 %RH 2.0 % to 50.0 %RH 0.1 %RH
100. CO2 P band CO2 ramp proportional band. 500 PPM 10 to 2000 PPM 1 PPM
101. VOC P Pand VOC ramp proportional band. 500 PPB 10 to 1000 PPB 1 PPB
102. Cool I Time Sec Cooling integral factor compensation. 60 sec 1 to 120 sec 1 sec
103. Heat I Time Sec Heating integral factor compensation. 60 sec 1 to 120 sec 1 sec
104. Humdty I Time Sec Humidity integral factor compensation. 60 sec 1 to 120 sec 1 sec
105. CO2 I Time Sec CO2 integral factor compensation. 60 sec 1 to 120 sec 1 sec
106. VOC I Time Sec VOC integral factor compensation. 60 sec 1 to 120 sec 1 sec
107. Temp Deadband Temperature deadband value. The
minimum range between the cooling and
heating setpoint within which the controller
will not take action for the temperature
reading.
3.6°F
(2°C)
0°F to 36°F
(0°C to 20°C)
0.2ºF
(0.1ºC)
108. Humidity Deadband Humidity deadband value. The minimum
range between the dehumidification and
humidification setpoint within which the
controller will not take action for the
humidity reading.
2 %RH 0% to 20% RH 0.1% RH

ARO Series Universal Room Controller
Specification and Installation Instructions
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Step / Display Description Default Range / Offset Increment
Network Settings (BACnet / Modbus)
109. Select Netwrk Proto Select the desired network protocol. bAC bAC (BACnet MS/TP) or mod (Modbus) --
110. BACnet Baud Rate Set the desired MS/TP baud rate setting. Auto Auto (Automatic detection), 9.6k, 19.2k,
38.4k, 57.6K, and 76.8k
--
111. MSTP MAC Addrss Select the desired MSTP MAC Address. 0 1 to 254 1
112. MSTP Max Master Select the desired MSTP MAX address for
the master device.
127 1 to 127 1
113. Adjust Device Inst Select Yes to change manually and
continue to the next step. If you select No,
the device instance will be modified
automatically according to the MAC
address.
No No or Yes --
114. 015325 If Yes was selected at step 113, use the
arrow keys to change the value and press
the [*] button to move to the next digit.
Current
value
0 to 4194302 1
115. Modbus Baud rate Set the desired Modbus baud rate setting. Auto Auto (Automatic detection), 9.6k, 19.2k,
38.4k, 57.6K
--
116. Modbus Port Config Select the desired parity and number of
stop bits for Modbus communication.
NP2S NP2S (No parity, 2 Stop bits)
EP1S (Even parity, 1 stop bit)
OP1S (Odd parity, 1 stop bit)
--
117. Modbus Addrss Select the desired Modbus address. 1 1 to 246 1
General Settings
118. Local Unit Select the unit measure displayed on the
controller.
METºC
METºC (Metric) or ImPºF (Imperial) --
119. Show Temp Select No to hide Temperature reading in
operation mode.
Yes No or Yes --
120. Show Humdty Select No to hide Humidity reading in
operation mode.
Yes No or Yes --
121. Show CO2 Select No to hide CO2 reading in
operation mode.
Yes No or Yes --
122. Show VOC Select No to hide VOC reading in
operation mode.
Yes No or Yes
123. Auto Scroll In operation mode, the sensor values can
scroll automatically (ON) or manually by
pressing the enter key.
ON ON or OFF --

ARO Series Universal Room Controller
Specification and Installation Instructions
www.neptronic.com Page | 10
Operation Menus
This menu is accessible through normal operation mode. The Mode Selector jumper (JP3) of the thermostat must be set to the “RUN”
position (Operation Mode). Refer to Wiring on page 3.
1. Press the [*] and [] buttons simultaneously for 5 seconds. The “Enter Password” screen appears.
2. Enter the password within 1 minute by using the arrow keys to increase or decrease the value and the [*] and [] buttons to toggle
between the digits.
a. Password 372 = Temperature Offset Menu
b. Password 637 = Network Settings Menu
3. If you enter the wrong password, the thermostat displays “Eror” and returns to Operation Mode. The thermostat will return to
normal mode if you navigate through the entire menu and do not make any selection, or if you do not press any key for 5 minutes.
The changed values will be saved automatically.
Step / Display Description Default Range / Offset Increment
Menu 372 – Temperature Offset
1. Intrn Temp Offset The display shows the temperature read
by the temperature sensor. Adjust the
offset by comparing it with a known value.
Current
value
32ºF to 122ºF / offset: ±9ºF
(0ºC to 50ºC / offset: ±5ºC)
0.2ºF
(0.1ºC)
2. Extern Temp Offset The display shows the temperature read
by input AI1. Adjust the offset by
comparing it with a known value.
Current
value
-40ºF to 257ºF / offset: ±18ºF
(-40ºC to 125ºC / offset: ±10ºC)
0.2ºF
(0.1ºC)
3. Humdty Offset The display shows the relative humidity
read by the humidity sensor. Adjust the
offset by comparing it with a known value.
Current
value
0% to 100% RH / Offset: ±5% 0.1% RH
4. CO2 Offset The display shows the CO2 level read by
the CO2 sensor. Adjust the offset by
comparing it with a known value.
Current
value
0 to 2000 PPM / Offset: ± 200 PPM 1 PPM
5. VOC Offset The display shows the VOC level read by
the VOC sensor. Adjust the offset by
comparing it with a known value.
Current
value
0 to 1000 PPB / Offset: ± 100 PPB 1 PPB
Menu 637 – Network Settings
6. Select Netwrk Proto Select the desired network protocol. bAC bAC (BACnet MS/TP) or mod (Modbus) --
7. BACnet Baud Rate Set the desired MS/TP baud rate setting. Auto Auto (Automatic detection), 9.6k, 19.2k,
38.4k, 57.6K, and 76.8k
--
8. MSTP MAC Addrss Select the desired MSTP MAC Address. 0 1 to 254 1
9. MSTP Max Master Select the desired MSTP MAX address for
the master device.
127 1 to 127 1
10. Adjust Device Inst Select Yes to change manually and
continue to the next step. If you select No,
the device instance will be modified
automatically according to the MAC
address.
No No or Yes --
11. 015325 If Yes was selected at step 8, use the
arrow keys to change the value and press
the [*] button to move to the next digit.
Current
value
0 to 4194302 1
12. Modbus Baud rate Set the desired Modbus baud rate setting. Auto Auto (Automatic detection), 9.6k, 19.2k,
38.4k, 57.6K
--
13. Modbus Port Config Select the desired parity and number of
stop bits for Modbus communication.
NP2S NP2S (No parity, 2 Stop bits)
EP1S (Even parity, 1 stop bit)
OP1S (Odd parity, 1 stop bit)
--
14. Modbus Addrss Select the desired Modbus address. 1 1 to 246 1

ARO Series Universal Room Controller
Specification and Installation Instructions
www.neptronic.com Page | 11
Reset to Factory Default Settings
This will erase all actual configurations and replace them with the factory default settings.
1. The Mode Selector jumper (JP3) of the thermostat must be set to the “RUN” position (Operation Mode). Refer to Wiring on page 3.
2. During the power up sequence of the controller (when the firmware version is displayed), press and hold both the and
buttons.
3. The “Enter Password” screen appears. Enter 372 within 1 minute by using the arrow keys to increase or decrease the value and the
and buttons to toggle between the digits.
4. Use the arrow buttons to select YES and then press .
Operation Mode
Set the Mode Selector Jumper JP3 to the “RUN” mode (Operation Mode).
For more information, see
Wiring on page 3.
F%
Press to
change
setpoint
Press to change
temp mode:
Auto
Heat
Cool
Off
Auto
scroll
or press
ppm
Auto
scroll
or press
Auto
scroll
or press
Press to
change
setpoint
Press to change
RH mode:
Auto
HUM
DEHUM
OFF
Press to change
CO2 mode:
ON
OFF
Press
Press to
change
setpoint
Press to
change
setpoint
Press to change
VOC mode:
ON
OFF
Press to change
system mode:
ON
OFF
Press to change
fan mode:
Auto
ON
OFF
Press

ARO Series Universal Room Controller
Specification and Installation Instructions
www.neptronic.com Page | 12
Power Up
Upon power up, the LCD illuminates, and all segments appear for 2 seconds. The controller then displays its current version for 2
seconds.
LCD Backlight
Pressing any key illuminates the LCD for 4 seconds.
Night Set Back (NSB) Mode
This function is available only if the nSb (Night Set Back contact) option is selected at Step 80, "AI1 Mode" or Step 81, “BI1 Mode”. If the
contact is triggered, the controller enters NSB mode (the symbol appears) and uses the NSB setpoints defined at Steps 93, "Unocc
Cool Setpnt" and 96, “Unocc Heat Setpnt”. When the contact is not triggered, the icon appears indicating the normal operation.
No Occupancy Mode
This function is available only if the OCC (Occupancy contact) option is selected at Step 80, "AI1 Mode" or Step 81, “BI1 Mode”. If the
contact is triggered, the icon appears indicating normal "Occupied" operation. When the contact is not triggered, the controller
enters into the Unoccupied mode (the symbol appears) and uses the unoccupied setpoints defined at Steps 93, "Unocc Cool Setpnt"
and 96, “Unocc Heat Setpnt” respectively.

ARO Series Universal Room Controller
Specification and Installation Instructions
www.neptronic.com Page | 13
Appendix - Application Profiles
This appendix provides additional information about the application profiles (App Profiles) used in the ARO Series Universal Room
Controllers.
APP PROFILE 1
Outside Air Application (Temperature only)
When selecting the option "1" from the application profiles menu, the controller automatically configures the following options:
AO1 AO2 BO1 BO2 AI BI System Modes
Demand Source Fan
OFF
Demand Source Fan
OFF OFF
Configuration Occupancy Main System On
Control Mode Highest Control Mode Highest Temperature Auto
Direction Direct Direction Direct Humidity Off
Min. Value 0% TPM/Hysteresis Hysteresis CO2 Off
Max. Value 100% Hysteresis Low 0% VOC Off
Hysteresis High 20%

ARO Series Universal Room Controller
Specification and Installation Instructions
www.neptronic.com Page | 14
APP PROFILE 2:
Conference Room (Temp, RH, and CO2)
When selecting the option "2" from the application profiles menu, the controller automatically configures the following options:
AO1 AO2 BO1 BO2 AI BI System Modes
Demand Source Fan
OFF
Demand Source Fan
OFF OFF
Configuration Occupancy Main System On
Control Mode Average Control Mode Average Temperature Auto
Direction Direct Direction Direct Humidity Auto
Min. Value 0% TPM/Hysteresis Hysteresis CO2 On
Max. Value 100% Hysteresis Low 0% VOC Off
Hysteresis High 20%

Notes

Recycling at end of life: please return this product to your Neptronic local distributor for recycling. If you need to find the nearest
Neptronic authorized distributor, please consult www.neptronic.com.
400 Lebeau blvd, Montreal, Qc, H4N 1R6, Canada
www.neptronic.com
Toll free in North America: 1-800-361-2308
Tel.: [phone]
Fax: [phone]
Customer service fax: [phone]
Monday to Friday: 8:00am to 5:00pm (Eastern time)