Rtu Open Controller System - United Technologies Carrier WeatherMaker 50TC A08 Series Installation Instructions Manual

RTU Open Controller System —
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
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,
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
P
i-Vu Open installations
The RTU Open
2 package.
®
J4
BO-1 BO-2
J12
o r o t c l o S e e l t c r o *Remove
both for 0-5V
Fig. 105 — RTU Open Multi-Protocol Controller Board
Carrier's i-Vu
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.
Board Power
J1
BO-3 BO-4 BO-5
J22
AO-2
GND
(2-10V)
J13
J17
J19
J20
S P T ( e t m p n i p u ) t B A
SPT (common) (LON connection J15)
SPT (offset input)
* 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.
63
Open network, or a Third Party Building Auto-
®
(AO-1)
0-10VDC
J3
J2
4-20mA
J5
J22
VFD Output
BO-6
J11
BO-6
BO-7
(H) Humidimizer
BO-7
(Reversing Valve/High Speed Fan/Y3)
BO-8
BO-8
(Power Exhaust)
Network Comm
J14
C n e , t M o d b u , s r o N 2
J5