Rtu Open Control System - Bryant 582J Series Installation Instructions Manual

RTU Open Control System

The RTU Open control is factory- - mounted in the 582J
unit's main control box, to the left of the CTB. See
Fig. 39 (or Fig. 40). Factory wiring is completed through
harnesses connected to the CTB. Field connections for
RTU Open sensors will be made at the Phoenix connectors
on the RTU Open board. The factory- - installed RTU Open
control includes the supply- - air temperature (SAT) sensor.
The outdoor air temperature (OAT) sensor is included in
the FIOP/accessory EconoMi$er
3-Volt
Lithium
Battery
LonWorks
Option Card
Port
J15
Example set for
BACnet MS/TP
and 76.8K baud
(1, 2, and 4 ON)
Protocol Selector
R 2 package.
Board Power
J4
BO-1 BO-2
J13
J12
J20
*Remove SPT (temp input)
both for 0-5V SPT (common)
SPT (offset input)
Fig. 38 - - RTU Open Multi- - Protocol Control Board
The RTU Open controller is an integrated component of the
Bryant rooftop unit. Its internal application programming
provides optimum performance and energy efficiency. RTU
Open enables the unit to run in 100% stand- - alone control
mode 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. 38.)
Refer to Table 6, RTU Open Controller Inputs and Outputs
for locations of all connections to the RTU Open board.
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)
26
(AO-1)
0-10VDC
J3
4-20mA
J5 J5
J22
VFD Output
J11
BO-6
(H) Dehumidification
BO-7
(Reversing Valve/High Speed Fan/Y3)
BO-8
(Power Exhaust)
J14
C14162