Emerson E2 Installation And Operation Manual page 98

P/N Sensor
203-5751 Wall-mounted
relative
humidity (RH)
sensor
210-2002 Wall-mounted
dewpoint sensor
206-0002 Light Level
Table 9-1
- Sensor Wiring
•
9-4 E2 RX/BX/CX I&O Manual
Input Type
Dip Switch
Down 1. Use Belden #8771 shielded three-conductor cable or equivalent.
2. Connect the RED, BLACK, and WHITE wires to the screw terminals the sensor's con-
nector as shown in Figure 2. Clip the SHIELD wire.
3. Connect the SHIELD and BLACK wires to the 0V terminal of the input board. Connect
the WHITE wire to the SIG terminal of the input board.
4. Connect the RED wire to the +12V power terminal on the input board.
5. Locate the input dip switch for the sensor point, and set to the OFF position (LEFT for
MultiFlex, DOWN for 16AI). Refer to the input board's user manual for locations of the
input dip switches.
Down 1. For wiring the sensor to a Emerson Retail Solutions input board, use Belden #8761
shielded two-conductor cable or equivalent.
2. Connect the BLACK and WHITE wires to the screw terminals on the sensor's connector
as shown in 
Figure 3 (connect BLACK to Signal Ground and WHITE to 0-5V Output). Clip the
SHIELD wire.
3. Connect the SHIELD and BLACK wires to the 0V terminal of the input board. Connect
the WHITE wire to the SIG terminal of the input board.
4. Connect 24VAC (a separate 120VAC/24VAC transformer must be used P/N 640-0039)
to the power terminal on the dewpoint sensor back plate using the BLACK and WHITE
wires. (This 24VAC transformer must only be used to power this dewpoint sensor. Do
not use this transformer to power additional devices.)
5. Locate the input dip switch for the sensor point, and set to the OFF position (LEFT for
MultiFlex, DOWN for 16AI). Refer to the input board's user manual for locations of the
input dip switches.
Separate
Transformer
(P/N 640-0039)
120 VAC
Down
1. Wire GREEN ground wire
to odd numbered terminal.
2. Wire YELLOW and RED
signal wires to even num-
bered terminal.
3. Wire the POWER wire to a
+12VDC source on input
board.
Wiring
WALL-MOUNT
DEWPOINT SENSOR
BACK PLATE
(FRONT VIEW)
24 VAC
0-5V
Output Signal
Ground
2 1
8 7 6 5 4 3 2 1
MULTIFLEX INPUT BOARD
(BOTTOM LEFT CORNER SHOWN)
026-1614 Rev 4 5-JAN-2013