Rtu Open Control System - Carrier WeatherMaster 50HC14 Installation Instructions Manual

installation and checkout. See Table 24 for the recommended
color code.
Table 24 — Color Code Recommendations
CCN BUS WIRE
SIGNAL TYPE
COLOR
+
GROUND
–
Connect the CCN (+) lead (typically RED) to the unit's
TB3-12 terminal. Connect the CCN (ground) lead (typically
WHT) to the unit's TB3-14 terminal. Connect the CCN (–)
lead (typically BLK) to the unit's TB3-16 terminal. See
Fig. 78.
CCN Bus
+ (RED)
GND (WHT)
– (BLK)
Fig. 78 — PremierLink Controller CCN Bus
Connections
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
i-Vu Open installations
CCN PLUG PIN
NUMBER
Red 1
White 2
Black 3
TB3
12 J2-1
TB3
14 J2-2
TB3
16 J2-3
J4
BO-1
J12
Protocol Selector *Remove
both for 0-5V
Fig. 79 — RTU Open Multi-Protocol Controller Board
RTU Open Controller System
The RTU Open controller is factory-mounted in the
50HC**14 unit's main control box, to the left of the CTB.
See Fig. 80. Factory wiring is completed through harnesses
connected to the CTB. Field-connections for RTU Open con-
troller 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 out-
door air temperature (OAT) sensor is included in the FIOP/
accessory EconoMi$er2 package.
The RTU Open controller (see Fig. 79) provides expanded
stand-alone operation of the HVAC system plus connection
and control through communication with several Building
Automation Systems (BAS) through popular third-party net-
work systems. The available network systems are BACnet
MP/TP, Modbus
Works 3 is also possible by adding an accessory interface card
PL
to the RTU Open. Selection of the communication protocol
and baud rate are made at on-board DIP switches.
Refer to Table 25, RTU Open Controller Inputs and Out-
puts for locations of all connections to the RTU Open control-
ler board.
1. BACnet is a registered trademark of ASHRAE (American Society
of Heating, Refrigerating and Air-Conditioning Engineers).
2. Modbus is a registered trademark of Schneider Electric.
3. LonWorks is a registered trademark of Echelon Corporation.
Board Power
J1
BO-2 BO-3 BO-4
J22
AO-2
GND
(2-10V)
J13
J17
J19
J20
SPT (temp input) BACnet, Modbus, or N2
SPT (common)
SPT (offset input)
52
2 and Johnson N2. Communication with Lon-
(AO-1)
0-10VDC
J3
J2
4-20mA
J5
BO-5
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
(LON connection J15)
1
J5