49
SPAN
ZERO
4-20
mA
VAC
or
VDC
GND 0-5V
or
0-10V
1
2
3
4
5
6
ON
J4-1 or J4-4 + 24 VDC Supply Voltage
J4-2 or J4-5 (-)4 to 20 mA Current Loop Output
to RTU Open
Relative Humidity Sensor
(Polarized Male Connector)
C12756
Fig. 56 -- Duct Relative Humidity Sensor Typical Wiring
Humidistat:
Use of a field--supplied humidistat provides
the RTU Open controller feedback on the relative
humidity in the space. The humidistat reads the RH level
in the space and compares it to its setpoint to operate a
dry contact. The humidistat is a dedicated input on the
configurable input 9 and tells the RTU Open controller
when the RH level is HIGH or LOW. The normal
condition for humidity is LOW.
To wire in the field:
S
J5--8 = 24 VAC source for dry contact
S
J5--7 = Signal input
Connecting Discrete Inputs —
Filter Status:
The filter status accessory is a field--installed
accessory. This accessory detects plugged filters. When
installing this accessory, the unit must be configured for
filter status by setting
MENU
Config
Inputs
input 3, 5,
8, or 9
to Filter Status and normally open (N/O) or normally
closed (N/C). Input 8 or 9 is recommended for easy of
installation. Refer to Fig. 43 and Fig. 44 for wire
terminations at J5.
Fan Status:
The fan status accessory is a field--installed
accessory. This accessory detects when the indoor fan is
blowing air. When installing this accessory, the unit must
be
configured
for
fan
status
by
setting
MENU
Config
Inputs
input 3, 5, 8, or 9
to Fan
Status and normally open (N/O) or normally closed (N/C).
Input 8 or 9 is recommended for easy of installation. Refer
to Fig. 43 and Fig. 44 for wire terminations at J5.
Remote Occupancy:
The remote occupancy accessory is
a field--installed accessory. This accessory overrides the
unoccupied mode and puts the unit in occupied mode.
When installing this accessory, the unit must be
configured
for
remote
occupancy
by
setting
MENU
Config
Inputs
input 3, 5, 8, or 9
to Remote
Occupancy and normally open (N/O) or normally closed
(N/C).
Also set
MENU
Schedules
occupancy source
to DI
on/off. Input 8 or 9 is recommended for easy of installation.
Refer to Fig. 43 and Table 22 for wire terminations at J5.
Power Exhaust (output):
The relay used by the RTU
Open controller board to control power exhaust is a dry
contact which means it does not have 24vac. This 24vac
must be connected to the relay to allow it to operate the
power exhaust relay in the PE accessory. A 24vac source
must be provided to J11--2 on the RTU Open controller
board. This can be provided by the unit’s transformer from
various sources. The “R” terminal on the unit’s central
terminal board (CTB) is a logical source. Refer to Fig. 43
and Fig. 44 for wire terminations at J11.
Communication Wiring -- Protocols
General —
Protocols are the communication languages spoken by
control devices. The main purpose of a protocol is to
communicate information in the most efficient method
possible. Different protocols exist to provide different
kinds of information for different applications. In the BAS
application, many different protocols are used, depending
on manufacturer. Protocols do not change the function of
a controller; just make the front end user different.
The RTU Open controller can be set to communicate on
four different protocols: BACnet, Modbus, N2, and
LonWorks. Switch 3 (SW3) on the board is used to set
protocol and baud rate. Switches 1 and 2 (SW1 and SW2)
are used to set the board’s network address. See Fig. 57
and 58 for protocol switch settings and address switches.
The third party connection to the RTU Open controller is
through plug J19. See Fig. 59 for wiring.
NOTE
: Power must be cycled after changing the SW1--3
switch settings.
Contact your Bryant applications engineer for more
detailed information on protocols, third party wiring, and
networking.
Содержание 548J*17 D Series
Страница 4: ...4 a548J 015 Fig 2 Unit Dimensional Drawing Size 17 Units ...
Страница 5: ...5 a548J 016 Fig 2 Unit Dimensional Drawing Size 17 Units cont ...
Страница 6: ...6 a548J 017 Fig 2 Unit Dimensional Drawing Size 17 Units cont ...
Страница 7: ...7 a548J 018 Fig 3 Unit Dimensional Drawing Size 24 Units ...
Страница 8: ...8 a548J 019 Fig 3 Unit Dimensional Drawing Size 24 Units cont ...
Страница 9: ...9 a548J 020 Fig 3 Unit Dimensional Drawing Size 24 Units cont ...
Страница 13: ...13 C10139 Fig 7 Roof Curb Details Size 17 Units ...
Страница 14: ...14 C10140 Fig 8 Roof Curb Details Size 24 Units ...
Страница 19: ...19 a50 9696 Fig 20 548J 17 24 Control Wiring Diagram with VFD Option ...
Страница 20: ...20 a50 9697 Fig 21 Typical 548J 17 24 Power Wiring Diagram 208 230V 3 Phase 60Hz unit shown ...
Страница 44: ...44 a50 9699 Fig 44 RTU Open System Control Wiring Diagram ...
