Rtu Open Controller System - Carrier 50TC Series Installation Instruction

RTU Open Controller System

The RTU Open controller is factory- - mounted in the
50TC unit's main control box, to the left of the CTB. See
Fig. 59 or 60. Factory wiring is completed through
harnesses connected to the CTB. Field- - connections for
RTU Open controller sensors will be made at the Phoenix
connectors on the RTU Open board. The factory- - installed
RTU Open controller includes the supply- - air temperature
(SAT) sensor. The outdoor air temperature (OAT) sensor is
included in the FIOP/accessory EconoMi$er
The RTU Open controller is an integrated component of
the Carrier rooftop unit.
3-Volt
Lithium
Battery
LonWorks
Option Card
Port
J15
Example set for
BACnet MS/TP
and 76.8K baud
(1, 2, and 4 ON)
Recommended for all
Protocol Selector
i-Vu Open installations
R 2 package.
Its internal application
Board Power
J4
BO-1 BO-2
J13
J12
J20
*Remove SPT (temp input)
both for 0-5V SPT (common)
SPT (offset input)
Fig. 58 - - RTU Open Multi- - Protocol Controller Board
programming provides optimum performance and energy
efficiency. The RTU Open controller enables the unit to
run in 100% stand- - alone control mode, Carrier's i- - Vu
Open network, or a Third Party Building Automation
System (BAS). On- - board DIP switches allow 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 Table 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.
J1 J2
BO-3 BO-4 BO-5
J22
AO-2
BO-6
GND
(2-10V)
BO-7
BO-8
J17
Network Comm
J19
BACnet, Modbus, or N2
(LON connection J15)
* 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.
33
(AO-1)
0-10VDC
J3
4-20mA
J5 J5
J22
VFD Output
J11
BO-6
(H) Humidimizer
BO-7
(Reversing Valve/High Speed Fan/Y3)
BO-8
(Power Exhaust)
J14
R
C14129