63
RTU Open Controller System —
The RTU Open
controller is factory-mounted in the 50TC unit’s main control
box (see Fig. 106), to the left of the CTB. Factory wiring is
completed through harnesses connected to the CTB. Field-con-
nections for RTU Open controller sensors will be made at the
Phoenix connectors on the RTU Open board. The factory-in-
stalled RTU Open controller includes the supply-air tempera-
ture (SAT) sensor. The outdoor air temperature (OAT) sensor is
included in the FIOP/accessory EconoMi$er
®
2 package.
The RTU Open controller is an integrated component of the
Carrier rooftop unit. Its internal application programming pro-
vides optimum performance and energy efficiency. RTU Open
enables the unit to run in 100% stand-alone control mode,
Carrier’s i-Vu
®
Open network, or a Third Party Building Auto-
mation System (BAS). On-board DIP switches allow you to se-
lect your protocol (and baud rate) of choice among the four
most popular protocols in use today: BACnet*, Modbus†,
Johnson N2 and LonWorks**. (See Fig. 105.)
Refer to Table 25, RTU Open Controller Inputs and Outputs
for locations of all connections to the RTU Open controller
board.
NOTE: The RTU Open controller acts as an intelligent imbed-
ded thermostat. A room thermostat cannot be used with the
RTU Open controller.
Fig. 105 — RTU Open Multi-Protocol Controller Board
J4
J2
J1
J5
J5
J22
J17
J19
J14
J11
J22
J3
J13
J12
J15
J20
Network Comm
Configurable - Input_8
24 V
AC
Configurable - Input_5
24 V
AC
Configurable - Input_3
24 V
AC
Input_9 (Humidistat)
24 V
AC
24 V
AC
Input _8 (Enthalpy)
AO-1 (ECON)
Gnd
(OA
T)
Gnd
(SA
T)
Input_5 (SMK)
Input_4
(R)
BO-5
(Y1)
BO-4
(Y2)
BO-3
(W1)
BO-2
(W2)
BO-1
(G)
Gnd
Input_3
(X)
24 V
AC IN
+24 VDC
Input_2 (CO2/RH)
Gnd
+24 VDC
Input_1 (CO2/RH)
Gnd
Board Power
(AO-1)
0-10VDC
4-20mA
BO-6
(H) Humidimizer
BO-7
(Reversing Valve/High Speed Fan/Y3)
BO-8
(Power Exhaust)
LonWorks
Option Card
Port
Example set for
BACnet MS/TP
and 76.8K baud
(1, 2, and 4 ON)
Recommended for all
i-Vu Open installations
2
N
r
o
,
s
u
b
d
o
M
,
t
e
n
C
A
B
)
t
u
p
n
i
p
m
e
t
(
T
P
S
r
o
t
c
e
l
e
S
l
o
c
o
t
o
r
P
(LON connection J15)
SPT (common)
SPT (offset input)
*Remove
both for 0-5V
AO-2
GND
(2-10V)
3-Volt
Lithium
Battery
BO-1
BO-2
BO-3
BO-4
BO-5
BO-6
BO-7
BO-8
VFD Output
*
BACnet is a registered trademark of ASHRAE (American Society of
Heating, Refrigerating and Air-Conditioning Engineers).
†
Modbus is a registered trademark of Schneider Electric.
** LonWorks is a registered trademark of Echelon Corporation.
Summary of Contents for Carrier WeatherMaker 50TC A08 Series
Page 4: ...4 Fig 2 Unit Dimensional Drawing Size 08 09 12 Units...
Page 5: ...5 Fig 2 Unit Dimensional Drawing Size 08 09 12 Units cont...
Page 6: ...6 Fig 3 Unit Dimensional Drawing Size 14 Unit...
Page 7: ...7 Fig 3 Unit Dimensional Drawing Size 14 Unit cont...
Page 9: ...9 Fig 4 Unit Dimensional Drawing Size 16 Unit cont...
Page 13: ...13 Fig 8 Roof Curb Details Size 16 Unit...
Page 50: ...50 Fig 73 50TC 16 Control Box Component PremierLink Locations...
Page 51: ...51 Fig 74 Typical PremierLink Control Wiring Diagram...
Page 52: ...52 Fig 75 Typical PremierLink Control Wiring Diagram with Humidi MiZer System Option...
Page 64: ...64 Fig 106 Typical RTU Open Controller Wiring Diagram 50TC 08 14 Size Units...
Page 65: ...65 Fig 107 Typical RTU Open Controller Wiring Diagram 50TC 16 Size Unit...
