AAON AA-EBUS-DRS-TGD-01K Quick start guide

E-BUS Digital Room Sensor
Technical Guide
Factory Packaged Controls

TABLE OF CONTENTS
OVERVIEW....................................................................................................................................... 3
BASIC OPERATION.......................................................................................................................... 4
Sensor Operation..................................................................................................................................................... 4
LED Operation ......................................................................................................................................................... 4
MOUNTING AND WIRING ................................................................................................................ 5
Dimensions .............................................................................................................................................................. 5
Environmental Requirements................................................................................................................................... 5
Important Wiring Considerations.............................................................................................................................. 5
Mounting .................................................................................................................................................................. 5
SENSOR OPERATION ...................................................................................................................... 6
Main Sensor Display Screens....................................................................................................6
Temperature and Humidity Status Screen .......................................................................................................... 6
Outside Air Temperature Humidity Status Screen............................................................................................... 6
Unit Information Screen ...................................................................................................................................... 6
Setpoint Adjust Screen ....................................................................................................................................... 7
Operation Modes ................................................................................................................................................ 7
TROUBLESHOOTING....................................................................................................................... 8
Temperature Sensor Testing for the OE217-02 Temperature Only Sensor.............................................................. 8
Temperature / Resistance Chart .............................................................................................................................. 9
APPENDIX ..................................................................................................................................... 10
Sensor Configuration and Test Screens ................................................................................................................ 10
Connecting the Digital Room Sensor to the HVAC Unit Controller ........................................................................ 12
Connecting a Wall Mounted E-BUS CO2Sensor to the HVAC Unit Controller ...................................................... 13
Connecting a Remote Sensor................................................................................................................................ 14
Mounting Plate Dimensions ................................................................................................................................... 17
WattMaster Controls Inc.
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PART NUMBER CROSS REFERENCE TABLE
PART DESCRIPTION ORION AAON TULSA
E-BUS LCD Digital Room Sensor Temp Only OE217-02 V09290
E-BUS LCD Room Sensor Temp & Humidity OE217-03 V09300
E-BUS Digital Room Sensor Temp & Humidity (No LCD Display) OE217-04 V12920
Mounting Plate BK000081 N/A
E-BUS CO2Sensor OE256-05 V09310
Return Air Temperature Sensor OE231 R44940 / P87140
EBC E-BUS Cables - varying lengths EBC-XXXF N/A
VCCX2 Controller OE338-26B-VCCX2 V87900
VCB-X Controller OE335-26B-VCBX V28940

E-BUS Digital Room Sensor Technical Guide 3
OVERVIEW
Overview
The OE217 series of E-BUS Digital Room Sensors are used to sense
Space Temperature only or Space Temperature & Space Humidity. See
Figures 1 & 2.
The OE217-02 model is the Space Temperature Sensor only model and
the OE217-03 & OE217-04 models are a combination Space Tempera-
ture & Space Humidity Sensor model. The OE217-04 model includes
an enclosure without LCD display, front LEDs, and buttons.
The sensors can be used with the VCCX2 Controller (OE338-26B-VC-
CX2), VCC-X Controller (OE338-26B-VCCX), and VCB-X Controller
(OE335-26B-VCBX) and connect to the controller using various lengths
of EBC E-BUS cables connected between the controller and the sensor.
The EBC E-BUS cables should not run in conduit with other AC line
voltage wiring or with any conductors carrying highly inductive loads.
The OE217-02 & OE217-03 sensors provide the following useful
functions:
• Provides 112 x 64 monochrome Graphical LCD display with
LED backlight
• Displays the Current Space Temperature
• Displays Outdoor Air Temperature (if controller is configured
with an OA Temperature Sensor)
Features
Figure 1: OE217-02 & OE217-03 E-BUS Digital
Room Sensor
Display Override
OVERRIDE ALARM
• Displays the Current Space Humidity (OE217-03 Model
Only)
• Displays Outdoor Air Relative Humidity (OE217-03 Model if
controller is configured with an OA Humidity Sensor)
• Displays the Current Zone Setpoint Temperature when slide
adjust is entered
• Equipped with Push Buttons for changing the Zone Setpoint
Temperature
• Equipped with an Override Button for forcing the VCC-X /
VCCX2 Controller or VCB-X Controller into Occupied Op-
eration from Unoccupied Operation
• Provides graphics to indicate the Mode of Operation
• Allows connection of a remote 10K Ohm, Type III thermistor
temperature sensor (or 4 sensor averaging array). See
Connecting a Remote Sensor section in the Appendix on page
14 for details.
• Provides LEDs to indicate Schedule Override, Button Push,
Alarms, and Communications
• Can display Temperature reading from a Remote Temperature
Sensor (see Figures 20 & 21, pages 14 & 15 for instructions)
Figure 2: OE217-04 E-BUS Digital Room Sensor

BASIC OPERATION
E-BUS Digital Room Sensor Technical Guide4
Figure 3: E-BUS Digital Room Sensor Components
Alarm LED
Sense
LED
Override
LED
Override
Button
Display
Button
Up
Button
Down
Button
LCD
Display
Cover Set
Screw
MICROCHIP
PIC24HJ
256GP206
Back View
Remote Thermistor
Sensor Connector
Front View
E-BUS Cable
Connection
+12Vdc
GND
-COM
SHLD
Comm LED
(Not visible
with back
cover on)
Display Override
OVERRIDE ALARM
Sensor Operation
When power is first applied to the OE217-02 E-BUS Digital Room
Sensor, the sensor will display the Current Room Temperature and the
current setting of the slide offset. The OE217-03 model will also display
Relative Humidity.
NOTE: The sensor readings are not accurate until the controller
that the sensor is connected to is done calibrating.
The sensor has 4 buttons—<Display>, <Override>, <Up>, and
<Down>. You can also access certain functions by touching the area
below the <Display> and <Override> buttons. The sensor has 4
LEDs—one to indicate an Override, one to indicate an Alarm, one to
indicate Communications, and one to indicate that a button has been
pressed. See Figure 3 for LED and Button Descriptions.
An icon for the current mode of operation will appear in the sensor
display. The operation mode icons are a Snowflake for Cooling Mode,
a Flame for Heating Mode, a Fan in motion for Vent Mode, and a Moon
for Unoccupied Mode. When the unit is in Unoccupied Mode, the
screen’s background will turn dark. See Figure 9, page 7 for examples
of operation modes.
Buttons and LEDs
LED Operation
Refer to Figure 3 for LED locations.
Alarm LED: The Alarm LED will blink when there is an alarm from
the Controller.
Sense LED: The Sense LED will blink when the sensor gets a valid
touch.
Override LED: The Override LED is inoperable when in Occupied
Mode. In Unoccupied Mode, if you touch the <Override> button, the
Override LED will blink, indicating an override request. The Control-
ler will respond by sending the unit into override. The Override LED
will then stay on for the duration of the Override. Any time the Unit
is in Override, you can request to cancel the override by touching the
<Override> button, and the Override LED will blink. The Unit will
then cancel the override. The Override LED will then turn off.
Comm LED: The Comm LED located on the back of the sensor
blinks on whenever communications are sensed.

E-BUS Digital Room Sensor Technical Guide
MOUNTING AND WIRING
5
Mounting
CAUTION: Do not touch the front face of the sensor while you
are plugging in the modular sensor cable. Touching the front face
of the sensor while plugging in the cable may prevent proper initial-
ization and keep the buttons on the sensor from working properly.
The E-BUS Digital Room Sensor is designed to be mounted to a vertical
2” x 4” electrical box recessed in the wall. If the wall cannot be pen-
etrated, a plastic surface mount box such as those made by WiremoldTM
may be used to mount the sensor to the wall surface. The Sensor should
be mounted at least 5 feet above the floor.
The Sensor is mounted by removing the front cover and fastening the
housing base to the electrical box using the supplied (2) 6/32” x 1” machine
screws. The modular cable is then plugged into the phone jack located on
the circuit board that is mounted on the cover. The cover is then placed
onto the housing base, and the Allen Screw on the bottom of the base is
adjusted to hold the cover in place. A locking screw secures the sensor
to the wall. See Figure 4 for E-BUS Digital Room Sensor dimensions.
Optional Mounting Plate
Included with the Digital Room Sensor is a mounting plate that
can be used, if necessary, to cover the sensor sheet rock opening.
This mounting plate screws onto the back of the housing base.
The mounting plate is then mounted and covers the recessed space
in the wall. A locking screw secures the sensor to the wall. See
Figure 24,page 17 for dimensions.
Environmental Requirements
The E-BUS Digital Room Sensor needs to be installed in an environment
that does not exceed a temperature greater than 150°F or less than -30°F
and does not exceed 90% relative humidity levels (non-condensing).
Indoor Reading Range
The E-BUS Digital Room Sensor’s Indoor Reading Range is 40°F to
120°F and 0-100% RH (RH is available on the OE217-03 & OE217-04
models). Its temperature reading accuracy is +/- .5°F, and its RH read-
ing accuracy is +/-2%. Its sensor element is the integral communicating
digital sensing device or external Type III Thermistor 10K Ohm @ 77°F.
Outdoor Reading Range
If your E-BUS Digital Room Sensor is set up to read an Outdoor Air
Temperature Sensor, any outdoor air temperature below -40°F will not
appear on the E-BUS Digital Room Sensor’s display.
Important Wiring Considerations
The E-BUS Digital Room Sensors connect to the VCC-X / VCCX2 or
VCB-X Controller using various lengths of EBC E-BUS cable connected
between the controller and the sensor. The EBC E-BUS cables should not
run in conduit with other AC line voltage wiring or with any conductors
carrying highly inductive loads. See Figure 18, page 12 for wiring.
Dimensions and Mounting
Figure 4: E-BUS Digital Room Sensor Dimensions
MICROCHIP
PIC24HJ
256GP206
4.55”
2.80
Front View Side View Back View
0.69
1.1
1.81
1.87
0.49
Remote Thermistor
Sensor Connector
0.81
+12Vdc
GND
-COM
SHLD
Display Override
OVERRIDE ALARM

SENSOR SCREENS
E-BUS Digital Room Sensor Technical Guide
6
LCD Display Screens
Main Sensor Display Screens
There are 3 Main Sensor Display Screens. The first screen displays the
Current Room Temperature, Operation Mode, Slide Offset, and RH (RH
is available on the OE217-03 Model). The second screen displays the
Outside Air Temperature and/or Humidity if Outdoor Air Temperature
and/or Outdoor Air Humidity that is being monitored. The third screen
displays the unit information for the controller that the Digital Room
Sensor is connected to.
Temperature and Humidity Status
Screen
The Main Display Screen dis-
plays the current room tem-
perature, the humidity in the
room (RH is available on the
OE217-03 Model), the current
setting of the slide offset, and
an icon for the current mode of
operation once the controller it is
connected to is done calibrating.
The different icons shown are a
Snowflake for cooling mode, a
Flame for heating mode, a Fan in
motion for vent mode, and a Moon for unoccupied mode. When the unit
is in unoccupied mode, the screen’s background will turn dark. Refer to
Figure 9, page 7 for operation mode screen examples.
Figure 5: Main Display
Screen
Figure 6: Outdoor Status
Screen
Figure 7: Unit
Information Screen
Outside Air Temperature Humidity
Status Screen
If the connected controller is
receiving an outdoor air tempera-
ture and/or humidity broadcast,
touching <Display> will first
bring up the Outdoor Status
Screen.
Unit Information Screen
Touching <Display> again will
bring up the Unit Information
Screen which contains the con-
troller’s address or ID number,
screen ID, and software version
of the controller connected to
the sensor.

E-BUS Digital Room Sensor Technical Guide
SENSOR SCREENS
7
Setpoint Adjust Screen
Touching <>or <>will dis-
play the Setpoint Adjust Screen.
You can adjust the cooling and
heating setpoints from this screen
based on the VCC-X / VCCX2 or
VCB-X Controller slide offset
setpoint. For example, if the
connected controller’s Max Slide
Offset Setpoint is set for five, you
can adjust the setpoint up five
degrees and down five degrees.
NOTE: If the Unit Controller’s slide offset setpoint is set to Zero,
this screen will not appear when you touch <>or <>.
Figure 9: Operation Mode Screens
Cooling Mode
with Snowflake Icon
Heating Mode
with Flame Icon
Vent Mode
with Fan in Motion Icon
Figure 8: Setpoint Adjust
Screen
Unoccupied Mode
with Moon Icon
Operation Modes
Refer to Figure 9 for operation mode screen examples. The different
icons shown are a Snowflake for cooling mode, a Flame for heating
mode, a Fan in motion for vent mode, and a Moon for unoccupied
mode. When the unit is in unoccupied mode, the screen’s background
will turn dark.
LCD Display Screens

TROUBLESHOOTING
E-BUS Digital Room Sensor Technical Guide8
Troubleshooting the OE217-02 Temperature Only Sensor
Figure 10: Temperature/Resistance Testing for OE217-02 - Temperature Only Sensor
+
-
T
9302
NOTE: ,
Table 1
For This Test The Sensor Must Be Disconnected From Its E-BUS
Cable As Shown. The Meter Must Be Set To Measure Resistance In Ohms.
Use To Determine If The Sensor Is Reading The Correct Resistance
Value For The Ambient Temperature. This Resistance Value Should Match
The Temperature Value Listed Next To The Resistance Value In The Table.
The Temperature Should Be Measured With A Separate Accurate
Temperature Measuring Device Located In The Area Where The Sensor Is
Currently Located.
Measuring Digital Sensor Resistance
OE217-02 - Temperature Only Sensor
E-BUS Cable
From Sensor
Disconnected
MADE IN USA
YS102370 R1 ModBus LCD Space Sensor WattMaster Controls, Inc
PROGRAM
COMM
LED1
EXTERN
THERM
+12Vdc GND -COM
+COMM SHLD
P1
R1
F3
U4 C18
R36
C30
D1
L1
C17
R38
R37
C19
C31
C21
TB1
X2
J3
C3
C24
C23
C1
C8
C12
C13 C14
C16
C25
C26
J2
Q2
R3
R4
R6 R8
R9
R10
R11
R12
R14
R13 R15
TH1
U3
X1
C27
R18
C20
D4
R17
D6
D7
R32
R33
D5
1
J1
DISP1
C15
D2
R2
R5
R7
R16
R19
R20
U6
U2
TB2
R35
2.2uF
R18
1002
1001
1330
4751 4751
1001
1001
.1uF
9.21Mhz
4751 4751
LTC3502
.1uF
15pF6.8uF
.1uF
10uF
3162
1502
6.8uH
1002
24F
C1025
6.8uF
6.8uF
1001 4751
.1uF
.1uF
1000 1002
4751 .1uF
4751
ADM3483
.1uF
.1uF
RS1G
X05
MICROCHIP
PIC32MX440F
512H-80IPT
.1uF
10RO
10RO
470pF
X05
OE217-02 E-BUS Digital
Room Sensor
Back View
+
-

E-BUS Digital Room Sensor Technical Guide
TROUBLESHOOTING
9
Temperature/Resistance Chart
Table 1: Temperature/Resistance for Type III 10K Ohm Thermistor Sensors
Temperature – Resis-
tance –for Type III 10K
Ohm Thermistor Sensors
Temp
(ºF)
Resistance
(Ohms)
-10 93333
-5 80531
0 69822
5 60552
10 52500
15 45902
20 40147
25 35165
30 30805
35 27140
40 23874
45 21094
50 18655
52 17799
54 16956
56 16164
58 15385
60 14681
62 14014
64 13382
66 12758
68 12191
69 11906
70 11652
Temperature – Resis-
tance – for Type III 10K
Ohm Thermistor Sensors
Temp
(ºF)
Resistance
(Ohms)
71 11379
72 11136
73 10878
74 10625
75 10398
76 10158
78 9711
80 9302
82 8893
84 8514
86 8153
88 7805
90 7472
95 6716
100 6047
105 5453
110 4923
115 4449
120 4030
125 3656
130 3317
135 3015
140 2743
145 2502
150 2288

APPENDIX
E-BUS Digital Room Sensor Technical Guide
10
Pixel Test Screen
To select the first option—
Pixels—touch <> while at
the Sensor Configuration &
Test Screen (Figure 12). The
Pixel Test Screen tests the pixels
of the LCD display, allowing
you to make the screen white
with black characters, black
with white characters, or a
black or white screen. To exit
this screen, touch <Display>.
Sensor Info & LED Test Screen
To select the second option—
Info & LEDS—touch <>
while at the Sensor Configura-
tion & Test Screen (Figure 12).
The Sensor Info & LED Test
Screen shows the version of
software that the sensor is run-
ning and allows you to test the
LEDs that are used on the con-
troller. Touching <>will turn
the LEDs on and touching <>
will turn the LEDs off. To exit
this screen, touch <Display>.
Sensor Configuration and Test Screens
Sensor Configuration and Test
Screens
To access the Sensor Configuration & Test Screens, you first need to
access the Unit Information Screen by touching <Display> while at
the Main Display Screen.
NOTE: While in the Sensor Configuration & Test Screens, the
<Display> button functions as an exit key to return to the
previous screen or menu. After a few seconds, however,
the sensor will automatically revert to the Main Display
Screen. Refer to Figure 11 when reading the instructions
that follow.
Sensor Configuration & Test Screen
While the Unit Information
Screen is being displayed, you
can enter the Sensor Configura-
tion & Test Screen options by
touching simultaneously below
the <Display> and <Over-
ride> buttons. (See Figure 11
which shows where to touch to
access this option.)
Override
Button
Display
Button
Touch
Here
Touch
Here
Display Override
Figure 11: E-BUS Digital Room Sensor Buttons
Figure 12: Sensor
Configuration & Test
Screen
Figure 14: Sensor Info &
LED Test Screen
Figure 13: Sensor Info &
LED Test Screen

E-BUS Digital Room Sensor Technical Guide
APPENDIX
11
LCD Backlight Test Screens
To select the third option—
BACKLT—touch <Override>
while at the Sensor Configuration
& Test Screen (Figure 12, page
10). This option allows you to
control when the LCD backlight
turns on and off. You can con-
figure the backlight to stay on at
all times, remain off at all times,
or to come on when any button
is touched on the sensor.
To exit this screen, touch <Dis-
play>.
Sensor Configuration and Test Screens
Thermistor Averaging Screen
To select the fourth and final op-
tion—THRM AVG—, while at
the Sensor Configuration & Test
Screen (Figure 12, page 10),
touch simultaneously below the
<Display> and <Override>
buttons. (See Figure 11, page
10 which shows where to touch
to access this option.)
This option allows you to set the
rate—from 1-15 seconds—at
which the sensor takes a new
temperature reading. Touch <>
to increase the number of seconds
and touch <> to decrease the
number of seconds.
To exit this screen, touch <Dis-
play>.
NOTE: The sensor takes the average of the last 10 readings based
on the number that is entered in this screen. For example,
if you want a 3-second sample, the sensor will take the
average of the last 10 readings every 3 seconds over a
30-second span. Therefore, if you have your sensor next
to an outside doorway, you would want to enter a higher
number for your sample to give a more accurate read-
ing for the room temperature in case the outside door is
opened often.
Figure 15: Backlight Test
& Configuration Screen
Figure 16: Temperature
Averaging Screen
Address Screen
To access the Address Screen,
while at the Thermistor Averag-
ing Screen, (Figure 16), touch the
<Override> button.
This option allows you to set the
address—from 1-10. Touch <>
to increase the number and touch
<> to decrease the number.
The default is 1.
To exit this screen, touch
<Display>.
Figure 17: Address
Screen
SENSOR
1
COMM
ADDRESS

APPENDIX
E-BUS Digital Room Sensor Technical Guide
12
E-BUS Digital Room Sensor to HVAC Controller Wiring
E-BUS Digital Room Sensor
The OE217-02, OE217-03, or OE217-04 E-BUS Digital Room Sensor
connects to the VCC-X / VCCX2 or VCB-X Controller with the EBC
E-BUS expansion cable.
The Digital Room Sensor should be mounted at approximately 5 Ft.
above the floor on the wall in an area that does not have drafts or is
exposed to direct sunlight. See Figure 18 for wiring details.
VCCX2 Controller
E-BUS Digital
Room Sensor
EBC E-BUS
Cable
NOTE: When Only The E-BUS
Connects Directly To The
Controller Using A
Of The Appropriate Length.
Digital Room Sensor Is Used, It
Unit
n EBC E-BUS
Cable
Mount At Least 5 Feet Above Floor.
See on page 13 For
Connection When A Wall-Mounted
E-BUS C Sensor Is Also Used.
Figure 19
O2
Display Override
OVERRIDE ALARM
24 VAC POWER
ONLY
WARNING!
POLARITY MUST
BE OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
WattMaster
Overlay
#S 000079
Rev.: 1A
W
GND
DUCT
STATIC
+24 VAC
DUAL
EBUS
Figure 18: OE217-02, OE217-03 & OE217-04 – E-BUS Digital Room Sensor Wiring

E-BUS Digital Room Sensor Technical Guide
APPENDIX
13
E-BUS Digital
Room Sensor
Wall-Mounted
E-BUS CO Sensor
2
EBC E-BUS Cable
EBC E-BUS Cable
NOTE: Mount
Both Sensors At
Least 5 Feet Above
Floor. The Digital
Room Sensor
Connects To The
Sensor.CO
2
VCCX2 Controller
Display Override
OVERRIDE ALARM
24 VAC POWER
ONLY
WARNING!
POLARITY MUST
BE OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
WattMaster
Overlay
#S 000079
Rev.: 1A
W
GND
DUCT
STATIC
+24 VAC
DUAL
EBUS
Figure 19: OE256-05 – Wall Mounted E-BUS CO2Sensor Wiring
E-BUS CO2 Wall Mounted Sensor
The OE256-05 Wall Mounted E-BUS CO2Sensor is used to monitor CO2
levels in the space served by the HVAC unit. The CO2 Sensor connects to
the VCC-X / VCCX2 or VCB-X Controller with an EBC E-BUS cable.
It can be daisy-chained with the E-BUS Digital Room Sensor (OE217-
02, OE217-03, OE217-04) for applications requiring both a room CO2
sensor and room temperature sensor.
Wall Mounted E-BUS CO2Sensor Wiring
It should be mounted at approximately 5 Ft. above the floor on the wall
in an area that does not have drafts or is exposed to direct sunlight. See
Figure 19 for wiring details and installation notes.
NOTE: The OE265-07 Duct Mounted E-BUS CO2Sensor can
be used if desired instead of the Wall Mounted E-BUS
CO2Sensor. However, the E-BUS Digital Room Sensor
does not directly connect to the Duct Mounted E-BUS
CO2Sensor. See the OE265-07 E-BUS CO2Sensor
Technical Guide for Duct Mounted E-BUS CO2 Sensor
wiring details.

APPENDIX
E-BUS Digital Room Sensor Technical Guide
14
Connecting a Remote Sensor
Connecting a Remote Sensor
If the job requires this Sensor to be mounted outside of a conditioned
space, a remote WattMaster OE210 Space Sensor or OE231 Return
Air Temperature Sensor (or any 2-wire 10K Ohm, Type III thermistor
temperature sensor) can be hard-wired to the E-BUS Digital Room Sen-
sor. Other versions of the WattMaster space sensors (OE211, OE212,
or OE213) with slide adjust and/or override button should not be used
as the remote sensor.
Contact WattMaster Controls for wiring information if a four sensor
averaging array will be used as the “remote sensor”.
See Figure 20 for OE231 Return Air Temperature Sensor wiring. See
Figure 21, page 15 for OE210 Space Sensor wiring.
OE217-02 - E-BUS Digital Room Temperature Only
Sensor
Disconnect the modular cable from the E-BUS Digital Room Sensor
before performing the following modifications.
If using the OE217-02 Temperature Only version of the sensor, you must
first remove the Digital Sensor’s back cover. You will see a loop of wire
hanging off of the sensor circuit board. See Figure 22, page 16. This is
the external thermistor loop wire. Clip the external thermistor loop wire
Figure 20: OE231 Return Air Temperature Sensor Wiring
MICROCHIP
PIC24HJ
256GP206
OE217-02, OE217-03 & OE217-04
E-BUS Digital Room Sensor
Back View
Sensor Shown With
Back Cover Removed
Mount Sensor In Return Air
Duct As Shown. Route Wires
To Digital Room Sensor
Location And Connect To
Terminal Block.
Return
Air Duct
OE231 Return Air
Temperature Sensor
+12Vdc
GND
-COM
SHLD
so that the sensor will read the remote temperature input. Be sure to cut
the ends of the wire close to the circuit board so that the sensor loop wire
ends won’t short between each other. The remote sensor then wires to the
remote sensor terminal block on the back of the Digital Room Sensor.
If using the WattMaster OE210 type Space Sensor as the remote sensor,
you must clip off the C1 capacitor from the back of the OE210. Be sure to
cycle power to begin reading the remote sensor. See Figure 21, page 15.
OE217-03 & OE217-04 E-BUS Digital Room Tempera-
ture and Humidity Sensor
Disconnect the modular cable from the Digital Room Sensor before
performing the following modifications.
If using the OE217-03 and OE217-04 Temperature and Humidity ver-
sions of the Digital Room Sensor, you only need to wire the remote
sensor to the remote sensor terminal block on the digital sensor. DO
NOT CLIP OFF OR REMOVE the temperature/humidity sensor ele-
ment on the Digital Sensor. See Figure 23, page 16. When the remote
temperature sensor is wired in, it will override the on-board temperature
value of the OE217-03 or OE217-04 sensor, even though the sensor
element remains attached.
If using the WattMaster OE210 type Space Sensor as the remote sensor,
you must clip off the C1 capacitor from the back of the OE210. Be sure to
cycle power to begin reading the remote sensor. See Figure 21, page 15.

E-BUS Digital Room Sensor Technical Guide
APPENDIX
15
Connecting a Remote Sensor
Figure 21: Attaching the OE210 Space Room Sensor
MICROCHIP
PIC24HJ
256GP206
OE217-02, OE217-03 & OE217-04
E-BUS Digital Room Sensor
Back View
Sensor Shown With
Back Cover Removed
Remove
C1 Capacitor
OE210 Space
Temperature Sensor
Back View
TMP
GND
AUX
OUT
+12Vdc
GND
-COM
SHLD

APPENDIX
E-BUS Digital Room Sensor Technical Guide
16
Connecting a Remote Sensor
Figure 22: Wire Clipping Instructions For OE217-02 - Digital Room Temperature Only Sensor
MICROCHIP
PIC24HJ
256GP206
OE217-02 E-BUS Digital Room
Temperature Sensor Only
Back View
Sensor Shown With
Back Cover Removed
Cut Wire Loop As Shown.
Make Sure That The Wires
Are Cut Close Enough To
The Circuit Board So They
Can’t Touch Each Other.
+12Vdc
GND
-COM
SHLD
Figure 23: Instructions For OE217-03 & OE217-04 - Digital Room Temperature & Humidity Sensor
MICROCHIP
PIC24HJ
256GP206
OE217-03 & OE217-04 E-BUS Digital Room
Temperature & Humidity Sensor
Back View
Sensor Shown With
Back Cover Removed
WARNING: DO NOT CLIP OFF OR REMOVE THE
TEMPERATURE & HUMIDITY SENSING ELEMENT
Sensing Element
+12Vdc
GND
-COM
SHLD

E-BUS Digital Room Sensor Technical Guide
APPENDIX
17
Mounting Plate Dimensions
Figure 24: BK000081 Mounting Plate Dimensions
1.64
3.285
0.060
5.045
3.27
Optional Mounting Plate
Included with the Digital Room Sensor is a mounting plate that
can be used, if necessary, to cover the sensor sheet rock opening.
This mounting plate screws onto the back of the housing base.
The mounting plate is then mounted and covers the recessed space
in the wall. A locking screw secures the sensor to the wall. See
Figure 24 for dimensions.

NOTES
E-BUS Digital Room Sensor Technical Guide
18

E-BUS Digital Room Sensor Technical Guide
NOTES
19

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