Installation Guide

Installation and Operating Instructions
Duct and Outside Air Humidity with Optional Temperature Sensor
Building Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USA
Tel:[phone] • Fax[phone] • E-mail:[e-mail] • Web:www.bapihvac.com
49483_ins_duct_OSA_humidity
2 of 4
rev. 11/17/22
Wiring and Termination
Fig. 7: Wiring Diagram
NOTE: BAPI’s ±2% and ±3% humidity transmitters ARE
polarity sensitive as well as reverse polarity protected.
Table 1: Humidity Transmitter with 4 to 20mA Output
Wire Color Purpose Note
White Not Used Not Used
Black Humidity Output 4 to 20mA, To Analog Input of Controller
Red Power 7 to 40VDC
Table 2: Humidity Transmitter with 0 to 5 or 1 to 5 VDC Output
Wire Color Purpose Note
White Humidity Output
0 to 5 or 1 to 5 VDC, To Analog Input of
Controller
Black GND (Common) Ground for Power and Humidity Output
Red Power 7 to 40 VDC or 18 to 32 VAC
Optional Temperature Sensor Output
See Table 3 above for Wire Colors
(Sensors are not polarity sensitive,
3 wires used for 3-wire RTDs)
Humidity Output
& Power
See Tables 1 and 2 above
for Wiring Information
1.8KΩ Orange/Red 100Ω Red/Red
2.2KΩ Brown/White 1KΩ Orange/Orange
3KΩ Yellow/Black
3.25KΩ Brown/Green 1KΩ Green/Green
3.3KΩ Yellow/Brown
10K-2Ω Yellow/Yellow 2KΩ Brown/Blue
10K-3Ω Yellow/Red
10K-3(11K)Ω Yellow/Blue 100Ω Red/Red/Black*
20KΩ White/White 1KΩ Orange/Orange/Black*
47KΩ Yellow/Orange
50KΩ White/Blue
100KΩ Yellow/White
Table 4: Temperature Sensor Lead Wire Colors
Nickel RTD
Silicon RTD
*In the 3-Wire RTD sensors listed above,
the two wires of similar color are
connected together.
Additional sensors are available so your sensor may not be listed on this table.
Thermistors
Platinum RTDs - 2 Wire
Platinum RTDs - 3 Wire
BAPI recommends using twisted pair of at least 22AWG and sealant lled connectors for all wire connections. Larger
gauge wire may be required for long runs. All wiring must comply with the National Electric Code (NEC) and local codes.
Do NOT run this device’s wiring in the same conduit as AC power wiring of NEC class 1, NEC class 2, NEC class 3 or with
wiring used to supply highly inductive loads such as motors, contactors and relays. BAPI’s tests show that uctuating and
inaccurate signal levels are possible when AC power wiring is present in the same conduit as the signal lines. If you are
experiencing any of these di󰀩culties, please contact your BAPI representative.
BAPI recommends wiring the product with power disconnected. Proper supply voltage, polarity, and wiring
connections are important to a successful installation. Not observing these recommendations may damage the
product and will void the warranty.
Table 3: Humidity Transmitter with 0 to 10 or 2 to 10VDC Output
Wire Color Purpose Note
White Humidity Output
0 to 10 or 2 to 10VDC, To Analog Input of
Controller
Black GND (Common) Ground for Power and Humidity Output
Red Power 13 to 40 VDC or 18 to 32 VAC