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The LEDs on the RTU Open Controller show the status of certain functions
If this LED is on...
Power
Rx
Tx
BO#
The Run and Error LEDs indicate control module and network status
If Run LED shows...
2 flashes per second
2 flashes per second
2 flashes per second
2 flashes per second
2 flashes per second
5 flashes per second
5 flashes per second
7 flashes per second
14 flashes per second
On
Outdoor
Air
Enthalpy
33CSENTHSW) —
The
(33CSENTHSW) is available as a field-installed accessory to
be used with the EconoMi$er2 damper system. The outdoor air
enthalpy sensor is part of the enthalpy control. (The separate
field-installed accessory return air enthalpy sensor (33CSENT-
SEN) is required for differential enthalpy control. See Fig. 89.)
Locate the enthalpy control in the economizer next to the
Actuator Motor. Locate two GRA leads in the factory harness
and connect the gray lead labeled "ESL" to the terminal labeled
"LOW." See Fig. 89. Connect the enthalpy control power input
terminals to economizer actuator power leads RED (connect to
24V) and BLK (connect to GND).
The outdoor enthalpy changeover setpoint is set at the en-
thalpy controller.
Access
Port
J12
Connect to
computer's
USB port
USB Link Kit
Fig. 88 — PC Running Field Assistant
Table 19 — LEDs
Status is...
The RTU Open controller has power
The RTU Open controller is receiving data from the network segment
The RTU Open controller is transmitting data over the network segment
The binary output is active
And Error LED shows...
Off
2 flashes, alternating with Run LED
3 flashes, then off
4 flashes, then pause
On
On
Off
7 flashes per second, alternating with Run LED Ten second recovery period after brownout
14 flashes per second, alternating with Run
LED
On
Control
(P/N
enthalpy
control
P1
P1
P5
P5
Connect to
the Local
Access port
Normal
Five minute auto-restart delay after system error
Control module has just been formatted
Two or more devices on this network have the same
MSTP network address
Exec halted after frequent system errors or control pro-
grams halted
Exec start-up aborted, Boot is running
Firmware transfer in progress, Boot is running
Brownout
Failure. Try the following solutions:
· Turn the RTU Open controller off, then on.
· Format the RTU Open controller.
· Download memory to the RTU Open controller.
· Replace the RTU Open controller.
Enthalpy
Switch
24V
GND
LOW
Fig. 89 — Enthalpy Switch (33CSENTHSW)
60
LOCAL
ACCESS
RNET
J13
PORT
-
+
+12 DVC
Rnet-
MSB
LSB
Rnet+
GND
CR2032
J12
SW1
SW2
J15
SW3
J20
UI-10
on
UI-11
RTU Open Controller
Status is...
RED
PL6-1 (24-V)
BLK
PL6-4 (COM)
GRA
7
CTB ECON
(P'LINK: to J4-2) or
(RTU Open: to J2-6)
FACTORY WIRING HARNESS
Connections
RX
TX
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