BAPI BAPI-Stat 4 “X-Combo” Catalog Page
BAPI-Stat 4 “X-Combo”, Room %RH and Temp. Sensor
BA/BS4XC
Installation & Operating Instructions
rev. 10/28/1627939_ins_BS4XC
Overview and Identication
The BAPI-Stat 4 “X-Combo” (BA/BS4XC) Room Unit features 4 output channels and optional local indication of
temperature and humidity. Additional options include Temperature Setpoint, Humidity Setpoint and Local Override.
The optional LCD shows room temperature in °C or °F and room humidity in %RH. In addition, the unit has adjustable
offsets for both temperature and humidity and is capable of having the range for
the temp., humidity and setpoints changed in the eld.
The unit has 4 output channels. Channel 1 and 2 can be ordered as voltage
or current, channel 3 as voltage or resistance and channel 4 as a passive
temperature sensor or isolated override contact.
Fig. 2: Unit with
Override but No
Display or Setpoint
Fig. 3: Unit with
Override and Display
but No Setpoint
Fig. 4: Unit with
Override, Display
and Setpoint
Fig. 1: BAPI-Stat 4
X-Combo Dimensions
Mounting
JUNCTION BOX
1. Pull the wire through the wall and out the junction box, leaving about six
inches free. Pull the wire through the hole in the base plate.
2. Secure the base to the box using the #6-32 x 5/8 inch mounting screws
provided.
3. Terminate the unit according to the guidelines in the Termination section.
4. Attach Cover by latching it to the top of the base, rotating the cover down
and snapping it into place.
5. Secure the cover by backing out the lock-down screws using a 1/16” Allen
wrench until they are ush with the bottom of the cover.
DRYWALL MOUNTING
1. Place the base plate against the wall where you want to mount the sensor.
Mark the two mounting holes and the area where the wires will come
through the wall.
2. Drill two 3/16” holes in the center of each marked mounting hole. Insert a
drywall anchor into each hole.
3. Drill one 1/2” hole in the middle of the marked wiring area. Pull the wire
through the wall and out of the 1/2” hole, leaving about six inches free.
4. Pull the wire through the hole in the base plate.
5. Secure the base to the drywall anchors using the #6 x 1 inch mounting screws provided.
6. Terminate the unit according to the guidelines in the Termination section.
7. Attach Cover by latching it to the top of the base, rotating the cover down and snapping it into place. Secure the cover by
backing out the lock-down screws using a 1/16” Allen wrench until they are ush with the bottom of the cover.
Fig. 5: Mounting hardware is provided for
both junction box and drywall installation
(junction box installation shown).
NOTE: In a wall-mount application, the mixing of room air and air from within the wall cavity can lead to erroneous readings,
condensation, and premature failure of the sensor. To prevent this condition, plug the conduit hole with insulation in the
junction box.
Specications subject to change without notice.
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BAPI-Stat 4 “X-Combo”, Room %RH and Temp. Sensor
BA/BS4XC
Installation & Operating Instructions
rev. 10/28/1627939_ins_BS4XC
Termination
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. 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 difculties, 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.
Terminal Description
GND/NEU
........Power Supply Common Ground (Ground to the Controller)
Fig. 6: X-Combo Circuit Board
Circuit Board Note: If a display unit is
ordered with Setpoint Adjustment, then
Switches 3 & 4 will NOT be present
on the BACK of the circuit board. If a
display unit is ordered with Override,
then Switch 2 will NOT be present on
the back of the circuit board.
V+/HOT
CH1
...........Power Supply Hot (See specications for voltage details)
.................Ch. 1 Signal, Voltage or 4 to 20mA*, referenced to
Common Ground
CH2
.................Ch. 2 Signal, Voltage or 4 to 20mA*, referenced to
Common Ground
CH3
.................Ch. 3 Signal, Voltage or Resistance, referenced to
Common Ground
CH4 TEMP+
....Channel 4 + Signal, Passive Temp Sensor and/or
Override Contact, referenced to “CH4 TEMP -”
(**See “Grounding Note” below)
CH4 TEMP- .....Channel 4 - Signal, Passive Temp Sensor and/or Override
Contact (**See “Grounding Note” below).
OVR
.................Override input to turn on the Occupied BAPI-Man on the
Display, referenced to Common Ground
*4-20mA Note:
This current output is NOT a loop powered output. It sources the power
for the loop per the specication.
**Grounding Note:
Common Ground (-CG) or Differential Ground (-DF) are selected
per order but can be changed in the eld (see Optional Technician
Adjustments section). In -DF Mode, the “CH4 TEMP–” and “CH4 TEMP+”
terminals are isolated from the rest of the sensor. In -CG Mode, the “CH4
TEMP–” terminal is internally connected to the power ground terminal
GND/NEU.
Channel Output Variable Output Type
Terminal Temp Humidity Temp Humidity Override Voltage Current Resistive 592/334
Name Setpoint Setpoint Sourcing
CH1 X X X X X X
CH2 X X X X X X
CH3 X X X X <50KΩ
CH4 TEMP + X X Sensor V +
CH4 TEMP - X X Sensor V -
Specications subject to change without notice.
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BAPI-Stat 4 “X-Combo”, Room %RH and Temp. Sensor
Resistance Value
Resistance Value
10K-2 Thermistor 30.1KΩ (34.9°F) 4.75Ω (109.1°F)
10K-3 Thermistor 26.7KΩ (35.9°F) 5.11KΩ (108.4°F)
Optional Communication Jack Wiring
Fig. 7: Back
Plate of the
BAPI-Stat 4
BA/BS4XC
Installation & Operating Instructions
rev. 10/28/1627939_ins_BS4XC
Fig. 8: C35L
Comm. Jack
(male jack
shown for clarity)
C35L
C11L/
C22L
Comm Jack Pin Wire Color
Fig. 9: C11L/C22L
Comm. Jack
C11L/C22L Wiring
1 Not Connected
2 Black
3 Red
4 Yellow
5 Green
6 Not Connected
Optional Test and Balance Switch (SW5)
The test and balance switch is used by the balancer to equalize the ow of air or water per the design prints. This
switch can also be used by the commissioning technician to verify sensor termination in a point to point checkout of the
control system. The “Run” position allows the real sensor to be monitored. The “High” position forces the output to a
very hot reading and the “Low” position forces the output to a very cold output. The table below shows the most common sensor output readings.
High Temp (105°F)
Low: Sets the sensor value low
Sensor Type
Low Temp (40° F)
1000Ω RTD 1.02KΩ (41.20°F) 1.15KΩ (101.5°F)
Run: Sensor operates normally
High: Set the sensor value high
3000Ω Thermistor 7.87KΩ (39.8°F) 1.5KΩ (106.8°F)
10K-3(11K) Thermistor 7.32KΩ (43.7°F) 3.65Ω (105.2°F)
Display and Front Panel Button Operation
The “X-Combo” is available with optional LCD, override and
setpoint buttons. See Fig. 10 for a fully featured sensor.
NUMERICAL DISPLAY:
The default numerical display shows current temperature, and
toggles to humidity display at an adjustable rate of 1 to 20
seconds. When the up/down buttons are pushed, the display
will show and adjust the current setpoint and hold that display
for 3 seconds. The unit can also be programmed to “setpoint
only” display or setpoint lockout. See pages 4-5.
BAPI-MAN INDICATOR (FIG. 11):
The BAPI-Man on the display indicates whether the room is in
the “Occupied” (solid) or “Un-occupied” (hollow) status.
Note: The unit must receive a conrmation (ground) signal on
the “OVR” terminal for the BAPI-Man to remain visible on the
screen. Pressing the Override button will light the BAPI-Man
indicator; however, if no conrmation signal is received, then
the BAPI-Man will go blank (disappear) after 5 seconds.
Continued on next page....
Specications subject to change without notice.
“Setpoint” word Indicates
that the Setpoint is being
displayed.
Override Pushbutton for
Units without Setpoint
Temperature Display in
.5 Degree Increments
“BAPI-Man” Indicator
Setpoint Up/Down
Buttons
Override Pushbutton
Fig. 10: X-Combo with LCD, Setpoint and Override
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