Carrier 50TC Series - RTU Open Controller System

33
RTU Open Controller System
The RTU Open controller is factory--mounted in the
50TC unit’s main control box, to the l eft of the CTB. See
Fig. 59 or 60. Factory wiring is completed through
harnesses connected t o the CTB. Field--connect ions for
RTU Open controller sensors wil l be made at the Phoenix
connec tors on the RTU Open board. The factory--installed
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
R
2 package.
The RT U Open controller is an int egrated component of
the Carrier rooftop unit. Its internal application
programming provides optimum performance and energy
efficienc y. The RTU Open control ler enables the unit to
run in 100% stand--al one control mode, Carrier’s i--Vu
R
Open network, or a Third Party Building Automation
System (BAS). On--board DIP switches a llow you to
select your protocol (and baud rate) of choice among the
four most popular protocols in use today: BACnet*,
Modbus
{
, Johnson N2 and LonWorks**. (See Fig. 58.)
Refer to Ta ble 8, RTU Open Controller Inputs and Outputs
for locations of all connections to the RTU Open board.
NOTE: The RTU Open controller acts as an intelligent
imbedded thermostat. A room thermostat cannot be used
with the RTU Open controller.
J4
J2J1
J5 J5
J22
J17
J19
J14
J11
J22
J3
J13
J12
J15
J20
Network Comm
Configurable - Input_8
24 VAC
Configurable - Input_5
24 VAC
Configurable - Input_3
24 VAC
Input_9 (Humidistat)
24 VAC
24 VAC
Input _8 (Enthalpy)
AO-1 (ECON)
Gnd
(OAT)
Gnd
(SAT)
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 VAC 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
Protocol Selector SPT (temp input) BACnet, Modbus, or N2
(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
C14129
Fig. 58 -- RTU Open Multi--Protocol Controller Board
* BACnet is a registered trademark of ASHRAE (American Society of
Heating, Refrig erating and Air---Conditioning Engineers) .
{
Modbus is a registered trademark of Schneider Electric.
** LonWorks is a registered trademark of Echelon Corporation.
50TC