aci BACnet AVERAGING Series Installation instructions

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 1
FIGURE 1: ENCLOSURE
DIMENSIONS
BACnet / Modbus AVERAGING SERIES
Installation & Operation Instructions
Phone: [phone]
Website: workaci.com
GENERAL INFORMATION
The BACnet MS/TP / Modbus RTU Averaging Series
sensor is designed for use with electronic controllers
in commercial heating and cooling building manage-
ment systems. The ACI BACnet MS/TP / Modbus RTU
Averaging Series sensor monitor the average
temperature in commercial HVAC ductwork and
provides a better average temperature of the air
inside the duct compared to a single point duct
sensor. Averaging sensors are sold in either Copper
or Flexible Averaging variations. The Copper
Averaging sensors include a continuous sensing
element, which covers the entire length of the probe.
The Flexible Averaging sensor has either 4 or 9
sensing points depending on the length. It uses
BACnet MS/TP or Modbus for RTU for physical
connection to a BAS or controller, has dip switches to
set addresses and baud rate, parity and stop bits
(Modbus RTU only), and has on board end-of-line
termination. There is no analog output.
WIRING INSTRUCTIONS
The BACnet MS/TP /Modbus RTU Averaging Series
temperature sensor has a depluggable terminal
block located on the front of the PCB. For ease of
wiring, we recommend removing the block, wiring,
and reattaching before mounting. 16 to 22 AWG
two conductor shielded cable is recommended for
powering the sensors.
ACI recommends using Belden 3105 or compatible
cable for RS-485 communication wiring.This wire has
120 ohm input impendence. The terminal blocks
allow for (1) or (2) wires to be connected in each
position for daisy chaining. Daisy chain the RS-485
wiring and do not use “Star” or “T” wiring. Avoid
running communication wires next to AC line
voltage wires. These can be sources of noise that can
aect signal quality.
3.60"
(91.44 mm)
2.25"
(57.15 mm)
4.79"
(121.55 mm)
2.35"
(59.80 mm)
PRECAUTIONS
• Remove power before wiring. Never
connect or disconnect wiring with power
applied.
• It is recommended you use an isolated
UL-listed class 2 transformer when powering
the unit with 24 VAC. Failure to wire the
devices with the correct polarity when
sharing transformers may result in damage
to any device powered by the shared
transformer.
• If the 24 VDC or 24VAC power is shared with
devices that have coils such as relays,
solenoids, or other inductors, each coil must
have an MOV, DC/AC Transorb, Transient
Voltage Suppressor (ACI Part: 142583), or
diode placed across the coil or inductor. The
cathode, or banded side of the DC Transorb or
diode, connects to the positive side of the
power supply. Without these snubbers, coils
produce very large voltage spikes when
de-energizing that can cause malfunction or
destruction of electronic circuits.
MOUNTING INSTRUCTIONS
Drill a 3/8" (9.53 mm) hole in the duct. Gently uncoil
the copper tubing and insert the averaging
element through the hole until the foam pad is
tight to the duct. The sensor should then be strung
in a criss-cross pattern throughout the duct using
the mounting clips provided - see FIGURE 5 (P.3).
Use a pattern that covers the greatest surface area
of the duct to ensure that there is no stratication.
When bending the copper tubing, be careful that
you use a gradual bend and that you DO NOT kink
the copper tubing. Bends should be a minimum of
2” (50.8 mm). Each unit includes nylon wire ties
and mounts for mounting. Optional copper
capillary (ACI Item # 130525) or universal plastic
mounting clips (ACI Item # 145421 ) can be
ordered. Plastic mounting clips will help insulate
the copper sensing element from the metal duct.
The capillary clips help avoid kinks when bending.
When using Flexible averaging, do not cover the
heatshrink that is located throughout the sensor
(sensing points).
Drill pilot holes for the (2) mounting screws. Use the enclosure flange as a guide, or use the
dimensions listed below to measure out. Now fasten and insert (2) screws #8 x 3/4" TEK (provided and
recommended) through the mounting holes in the flange and tighten until the unit is held firmly to
the duct. Make sure the foam pad is tight to the duct to eliminate any possible air leaks.
For optimal temperature measurement, follow these tips:
•Mount coil horizontal for vertical stratication.
•Mount coil vertical for horizontal stratication.
•The sensor must be spread evenly over the full duct.
•The entire length of the sensor coil must be installed completely inside the duct. Do not have any part of
the sensor exposed to exterior air.
•When installing the sensor near air-handling units, place the sensor downstream from the fan discharge.
The stratied airstream will be more uniform across the duct cross-section. If the air is not well-mixed, the
reading may be inaccurate.
•If UV Lights are installed in duct, do not use Flexible Averaging. There is no UV protectant on outer cable
jacket. Copper averaging must be used in this situation.
FIGURE 2: LAYOUT
DIP SWITCH
BAUDADDRESS
OFF ON PAR
SW4
BAC
NET MOD BUS
RESET
BUTTON
END OF LINE
TERMINATION
LED
EN DIS
D+D-GNV
64
32
16
8
4
2
1
4
2
1
1
ON
1
2
234
TERMINAL
BLOCKS
Version: 2.0
I0000932

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 2
GENERAL INFORMATION
The BACnet MS/TP / Modbus RTU Averaging Series
sensor is designed for use with electronic controllers
in commercial heating and cooling building manage-
ment systems. The ACI BACnet MS/TP / Modbus RTU
Averaging Series sensor monitor the average
temperature in commercial HVAC ductwork and
provides a better average temperature of the air
inside the duct compared to a single point duct
sensor. Averaging sensors are sold in either Copper
or Flexible Averaging variations. The Copper
Averaging sensors include a continuous sensing
element, which covers the entire length of the probe.
The Flexible Averaging sensor has either 4 or 9
sensing points depending on the length. It uses
BACnet MS/TP or Modbus for RTU for physical
connection to a BAS or controller, has dip switches to
set addresses and baud rate, parity and stop bits
(Modbus RTU only), and has on board end-of-line
termination. There is no analog output.
WIRING INSTRUCTIONS
The BACnet MS/TP /Modbus RTU Averaging Series
temperature sensor has a depluggable terminal
block located on the front of the PCB. For ease of
wiring, we recommend removing the block, wiring,
and reattaching before mounting. 16 to 22 AWG
two conductor shielded cable is recommended for
powering the sensors.
ACI recommends using Belden 3105 or compatible
cable for RS-485 communication wiring.This wire has
120 ohm input impendence. The terminal blocks
allow for (1) or (2) wires to be connected in each
position for daisy chaining. Daisy chain the RS-485
wiring and do not use “Star” or “T” wiring. Avoid
running communication wires next to AC line
voltage wires. These can be sources of noise that can
aect signal quality.
TABLE 1: WIRING CONNECTIONS
CONNECTIONS
Power Supply Positive 12-36 VDC / 24 VAC
Power Supply Common or Ground
EIA-485 Data Negative
EIA-485 Data Positive
TERMINAL
BLOCKS
+V
GN
D-
D+
PRECAUTIONS
• Remove power before wiring. Never
connect or disconnect wiring with power
applied.
• It is recommended you use an isolated
UL-listed class 2 transformer when powering
the unit with 24 VAC. Failure to wire the
devices with the correct polarity when
sharing transformers may result in damage
to any device powered by the shared
transformer.
• If the 24 VDC or 24VAC power is shared with
devices that have coils such as relays,
solenoids, or other inductors, each coil must
have an MOV, DC/AC Transorb, Transient
Voltage Suppressor (ACI Part: 142583), or
diode placed across the coil or inductor. The
cathode, or banded side of the DC Transorb or
diode, connects to the positive side of the
power supply. Without these snubbers, coils
produce very large voltage spikes when
de-energizing that can cause malfunction or
destruction of electronic circuits.
MOUNTING INSTRUCTIONS
Drill a 3/8" (9.53 mm) hole in the duct. Gently uncoil
the copper tubing and insert the averaging
element through the hole until the foam pad is
tight to the duct. The sensor should then be strung
in a criss-cross pattern throughout the duct using
the mounting clips provided - see FIGURE 5 (P.3).
Use a pattern that covers the greatest surface area
of the duct to ensure that there is no stratication.
When bending the copper tubing, be careful that
you use a gradual bend and that you DO NOT kink
the copper tubing. Bends should be a minimum of
2” (50.8 mm). Each unit includes nylon wire ties
and mounts for mounting. Optional copper
capillary (ACI Item # 130525) or universal plastic
mounting clips (ACI Item # 145421 ) can be
ordered. Plastic mounting clips will help insulate
the copper sensing element from the metal duct.
The capillary clips help avoid kinks when bending.
When using Flexible averaging, do not cover the
heatshrink that is located throughout the sensor
(sensing points).
Drill pilot holes for the (2) mounting screws. Use the enclosure flange as a guide, or use the
dimensions listed below to measure out. Now fasten and insert (2) screws #8 x 3/4" TEK (provided and
recommended) through the mounting holes in the flange and tighten until the unit is held firmly to
the duct. Make sure the foam pad is tight to the duct to eliminate any possible air leaks.
For optimal temperature measurement, follow these tips:
•Mount coil horizontal for vertical stratication.
•Mount coil vertical for horizontal stratication.
•The sensor must be spread evenly over the full duct.
•The entire length of the sensor coil must be installed completely inside the duct. Do not have any part of
the sensor exposed to exterior air.
•When installing the sensor near air-handling units, place the sensor downstream from the fan discharge.
The stratied airstream will be more uniform across the duct cross-section. If the air is not well-mixed, the
reading may be inaccurate.
•If UV Lights are installed in duct, do not use Flexible Averaging. There is no UV protectant on outer cable
jacket. Copper averaging must be used in this situation.
FIGURE 3:
MOUNTING
DIMENSIONS
PB ENCLOSURE
1.51"
(38.25 mm)
3.01"
(76.51 mm)
FIGURE 4: MOUNTING CLIP
DIMENSIONS
UNIVERSAL PLASTIC MOUNTING CLIP
(ACI #145421)
COPPER CAPILLARY CLIP
(ACI #130525)
Ø: 1.14”
(28.83 mm)
1.21”
(30.63 mm)
0.60”
(15.18 mm)
1.13”
(28.58 mm)
2.49”
(63.13 mm)
2.00”
(50.80 mm)
Ø: 0.25”
(6.35 mm)
Ø: 1.38”
(35.09 mm)
0.24”
(6.16 mm)
1.44”
(36.58 mm)
2.05”
(51.94 mm)
Ø: 0.21”
(5.40 mm)
Ø: 0.25”
(6.35 mm)
Version: 2.0
I0000932

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 3
GENERAL INFORMATION
The BACnet MS/TP / Modbus RTU Averaging Series
sensor is designed for use with electronic controllers
in commercial heating and cooling building manage-
ment systems. The ACI BACnet MS/TP / Modbus RTU
Averaging Series sensor monitor the average
temperature in commercial HVAC ductwork and
provides a better average temperature of the air
inside the duct compared to a single point duct
sensor. Averaging sensors are sold in either Copper
or Flexible Averaging variations. The Copper
Averaging sensors include a continuous sensing
element, which covers the entire length of the probe.
The Flexible Averaging sensor has either 4 or 9
sensing points depending on the length. It uses
BACnet MS/TP or Modbus for RTU for physical
connection to a BAS or controller, has dip switches to
set addresses and baud rate, parity and stop bits
(Modbus RTU only), and has on board end-of-line
termination. There is no analog output.
WIRING INSTRUCTIONS
The BACnet MS/TP /Modbus RTU Averaging Series
temperature sensor has a depluggable terminal
block located on the front of the PCB. For ease of
wiring, we recommend removing the block, wiring,
and reattaching before mounting. 16 to 22 AWG
two conductor shielded cable is recommended for
powering the sensors.
ACI recommends using Belden 3105 or compatible
cable for RS-485 communication wiring.This wire has
120 ohm input impendence. The terminal blocks
allow for (1) or (2) wires to be connected in each
position for daisy chaining. Daisy chain the RS-485
wiring and do not use “Star” or “T” wiring. Avoid
running communication wires next to AC line
voltage wires. These can be sources of noise that can
aect signal quality.
PRECAUTIONS
• Remove power before wiring. Never
connect or disconnect wiring with power
applied.
• It is recommended you use an isolated
UL-listed class 2 transformer when powering
the unit with 24 VAC. Failure to wire the
devices with the correct polarity when
sharing transformers may result in damage
to any device powered by the shared
transformer.
• If the 24 VDC or 24VAC power is shared with
devices that have coils such as relays,
solenoids, or other inductors, each coil must
have an MOV, DC/AC Transorb, Transient
Voltage Suppressor (ACI Part: 142583), or
diode placed across the coil or inductor. The
cathode, or banded side of the DC Transorb or
diode, connects to the positive side of the
power supply. Without these snubbers, coils
produce very large voltage spikes when
de-energizing that can cause malfunction or
destruction of electronic circuits.
MOUNTING INSTRUCTIONS
Drill a 3/8" (9.53 mm) hole in the duct. Gently uncoil
the copper tubing and insert the averaging
element through the hole until the foam pad is
tight to the duct. The sensor should then be strung
in a criss-cross pattern throughout the duct using
the mounting clips provided - see FIGURE 5 (P.3).
Use a pattern that covers the greatest surface area
of the duct to ensure that there is no stratication.
When bending the copper tubing, be careful that
you use a gradual bend and that you DO NOT kink
the copper tubing. Bends should be a minimum of
2” (50.8 mm). Each unit includes nylon wire ties
and mounts for mounting. Optional copper
capillary (ACI Item # 130525) or universal plastic
mounting clips (ACI Item # 145421 ) can be
ordered. Plastic mounting clips will help insulate
the copper sensing element from the metal duct.
The capillary clips help avoid kinks when bending.
When using Flexible averaging, do not cover the
heatshrink that is located throughout the sensor
(sensing points).
Drill pilot holes for the (2) mounting screws. Use the enclosure flange as a guide, or use the
dimensions listed below to measure out. Now fasten and insert (2) screws #8 x 3/4" TEK (provided and
recommended) through the mounting holes in the flange and tighten until the unit is held firmly to
the duct. Make sure the foam pad is tight to the duct to eliminate any possible air leaks.
For optimal temperature measurement, follow these tips:
•Mount coil horizontal for vertical stratication.
•Mount coil vertical for horizontal stratication.
•The sensor must be spread evenly over the full duct.
•The entire length of the sensor coil must be installed completely inside the duct. Do not have any part of
the sensor exposed to exterior air.
•When installing the sensor near air-handling units, place the sensor downstream from the fan discharge.
The stratied airstream will be more uniform across the duct cross-section. If the air is not well-mixed, the
reading may be inaccurate.
•If UV Lights are installed in duct, do not use Flexible Averaging. There is no UV protectant on outer cable
jacket. Copper averaging must be used in this situation.
BACnet MS/TP and Modbus RTU
INTERFACE (Continued)
ACI’s Modbus RTU sensors are slave devices. Only
one master is connected to the bus and several
slave nodes are connected to the same trunk. The
Master initiates communication. The slave nodes
only respond to a request from the Master. Slave
nodes do not communicate with each other.
Each branch must have all devices connected with
(+) connected to (+) and (-) connected to (-). If a
shielded cable is used, this is not to be connected
to the devices. The shield cable should only be
connected on one end to earth ground, usually at
the controller. The start and end of each branch
should have a termination resistor at the device
level or at the controller.
Each device must be congured for the correct
baud rate and have a unique address in each
branch. The baud rate for the branch is set by the
controller. This product has auto-baud for ease of
network conguration but setting the baud rate
using the DIP switches is recommended. Note:
Auto-baud feature does not function when
Modbus is the selected protocol.
BAUD RATE SELECTION
By default, BACnet Protocol and Auto-Baud is
factory set. If the sensor is eld adjusted for
Modbus RTU, the baud rate should be selected at
this time to match the Master conguration. If
Modbus RTU protocol is selected it is
recommended the sensor unique address is
selected at this time. Switches 8-10 are used to
set the BACnet and Modbus baud rate. Refer to
TABLE 3 for switch settings. Where (0) is OFF and
(1) is ON. If the system’s baud rate is known, it is
recommended to set the specic baud rate to
match the system. If the device is powered when
a change is made, the device must be power
cycled or reset for changes in baud rate to be
made.
BACnet MS/TP and Modbus RTU INTERFACE
The BACnet Master-Slave/Token-Passing (MS/TP) and Modbus Remote Terminal Unit (RTU) data link
protocol uses EIA-485 as a two-wire, daisy chain network. A branch is a discrete chain of devices connected
to a controller. The max number of devices per segment is 32, as per the BACnet and Modbus
specications. 4000 ft (1219.2 m) is the maximum recommended length for a segment, which includes all
devices from the controller to the last device in the daisy chain.
BACnet or Modbus RTU protocol selection is done via SW4 switch. Place dipswitch #4 to the OFF position
for BACnet and the ON position for Modbus. Refer to FIGURE 6.
ACI’s BACnet sensors are master devices. Only master nodes are allowed to send and receive tokens on the
MSTP network.
VERTICAL COILING
OPTIONAL COPPER OR
PLASTIC CAPILLARY CLIP
WIRE TIE MOUNT
HANGER STRIPS
OPTIONAL COPPER OR
PLASTIC CAPILLARY CLIP
WIRE TIE MOUNT
HANGER STRIPS
FIGURE 5: HORIZONTAL AND VERTICAL COILING
HORIZONTAL COILING
MIN. BEND
RADIUS 2” (50.8 mm)
MIN. BEND
RADIUS 2” (50.8 mm)
EOL TERMINATION RESISTANCE
SELECTION
RS-485 requires that the last device in a chain
have a termination resistor. This is controlled
using a jumper in the EN (enabled) position
marked on FIGURE 7. When the jumper is set to
EN (enabled), a 120Ω resistance is added in
parallel to the data line.When the jumper is set to
DIS (disable), the resistance is not added. By
default, the jumper is placed in the DIS (disabled)
position.
RESET
The reset button can be used to reset the device
without disconnecting power. The location of
this button is shown in FIGURE 2 P.1.
Version: 2.0
I0000932

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 4
BACnet MS/TP and Modbus RTU
INTERFACE (Continued)
ACI’s Modbus RTU sensors are slave devices. Only
one master is connected to the bus and several
slave nodes are connected to the same trunk. The
Master initiates communication. The slave nodes
only respond to a request from the Master. Slave
nodes do not communicate with each other.
Each branch must have all devices connected with
(+) connected to (+) and (-) connected to (-). If a
shielded cable is used, this is not to be connected
to the devices. The shield cable should only be
connected on one end to earth ground, usually at
the controller. The start and end of each branch
should have a termination resistor at the device
level or at the controller.
Each device must be congured for the correct
baud rate and have a unique address in each
branch. The baud rate for the branch is set by the
controller. This product has auto-baud for ease of
network conguration but setting the baud rate
using the DIP switches is recommended. Note:
Auto-baud feature does not function when
Modbus is the selected protocol.
FIGURE 6: SW4 DIPSWITCH
SETTINGS
BAUD RATE
Auto-Baud
9600
19200
38400
57600
76800
Reserved
SW 8
0
0
0
0
1
1
1
SW 9
0
0
1
1
0
0
1
SW 10
0
1
0
1
0
1
0
TABLE 3: BAUD RATE SELECTION
**Note: Auto-Baud not available for Modbus RTU.
DIP 1 – PAR2 (only applies to Modbus)
DIP 2 – PAR1(only applies to Modbus)
DIP 3 – OPEN (For Future Use)
DIP 4 -- OFF is BACNET, ON is MODBUS
BAUD RATE SELECTION
By default, BACnet Protocol and Auto-Baud is
factory set. If the sensor is eld adjusted for
Modbus RTU, the baud rate should be selected at
this time to match the Master conguration. If
Modbus RTU protocol is selected it is
recommended the sensor unique address is
selected at this time. Switches 8-10 are used to
set the BACnet and Modbus baud rate. Refer to
TABLE 3 for switch settings. Where (0) is OFF and
(1) is ON. If the system’s baud rate is known, it is
recommended to set the specic baud rate to
match the system. If the device is powered when
a change is made, the device must be power
cycled or reset for changes in baud rate to be
made.
SW4
OFF
ON
1
ON
234
BACnet MS/TP and Modbus RTU INTERFACE
The BACnet Master-Slave/Token-Passing (MS/TP) and Modbus Remote Terminal Unit (RTU) data link
protocol uses EIA-485 as a two-wire, daisy chain network. A branch is a discrete chain of devices connected
to a controller. The max number of devices per segment is 32, as per the BACnet and Modbus
specications. 4000 ft (1219.2 m) is the maximum recommended length for a segment, which includes all
devices from the controller to the last device in the daisy chain.
BACnet or Modbus RTU protocol selection is done via SW4 switch. Place dipswitch #4 to the OFF position
for BACnet and the ON position for Modbus. Refer to FIGURE 6.
ACI’s BACnet sensors are master devices. Only master nodes are allowed to send and receive tokens on the
MSTP network.
FIGURE 7: EOL TERMINATION
JUMPERS
END OF LINE
TERMINATION ENABLED END OF LINE TERMINATION DISABLED
EN DIS EN DIS
EOL TERMINATION RESISTANCE
SELECTION
RS-485 requires that the last device in a chain
have a termination resistor. This is controlled
using a jumper in the EN (enabled) position
marked on FIGURE 7. When the jumper is set to
EN (enabled), a 120Ω resistance is added in
parallel to the data line.When the jumper is set to
DIS (disable), the resistance is not added. By
default, the jumper is placed in the DIS (disabled)
position.
RESET
The reset button can be used to reset the device
without disconnecting power. The location of
this button is shown in FIGURE 2 P.1.
Version: 2.0
I0000932

TEMPERATURE AND RH OFFSET
This device allows for a temperature oset of
+/-5C (9F) and an RH oset of +/-10%. By default,
these values are set to 0, meaning no oset is
added.
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 5
ADDRESS
0
1
12
SW
1
(64)
0
0
0
SW
2
(32)
0
0
0
SW
3
(16)
0
0
0
SW
4
(8)
0
0
1
SW
5
(4)
0
0
1
SW
6
(2)
0
0
0
SW
7
(1)
0
1
0
TABLE 4: ADDRESS SELECTION
LED INFORMATION
One LED indicates four statuses. Solid green
shows that power is good, but no data is
transmitting. A solid Amber indicates that
auto-baud is set and no data has been received to
set a baud rate. Green/Amber ashing indicates
data is being transmitted or received. Solid Red
LED status indicates an error state, usually loss of
communication on the network. If BACnet is the
selected protocol, and this status remains for 10
times the APDU timeout, the device will
automatically reset. If this state remains longer
than that, reset the device.
ADDRESS SELECTION
Switches 1-7 are used to set the BACnet and
Modbus addressing. Refer to TABLE 4 for switch
settings. Each device in a network branch must
have a unique address. The value of each position
is printed on the board. By default, the address is
(0). Note: (0) cannot be used if Modbus RTU
protocol is selected and will require a unique
address. If the device is powered when a change
is made, the device must be power cycled or reset
for changes in address to be made.
DEVICE CONFIGURATION
THROUGH BACnet
DEVICE INSTANCE
The Device Instance, by default, is 1035000 plus
the Address. For example, an Address of 21 results
in a default address of 1035021. This can be
changed once the device is connected to the
network, but each device instance must be
unique within the network, not just this segment.
DEVICE NAME
By default, the device name is based on the type
of device and the address. The device name can
be a character string up to 32 characters in length.
This can be changed once the device is connected
to the network. For example: Temperature Sensor
- 034. The device name must be unique
throughout the entire BACnet network, not just
this segment.
TABLE 5: UNIT SETTING
UNITS
°F
K
°C
VALUE
64
63
62
TEST MODE BACnet
For the Sensor objects (AI0 and AI1), a test mode
can be set by writing the Boolean value true to the
“out-of-service” property. Then the present-value
can be set to any valid test value the user requires.
This allows a user to test reactions to specic
values returned by this device.
DEVICE LOCATION
The device location is optional but is intended to
allow for further denition of the device’s location.
The device location can be a character string up to
64 characters in length.
DEVICE DESCRIPTION
By default, the device description is optional but is
intended to allow for further information about
the device or its environment. The device location
can be a character string up to 64 characters in
length.
TEMPERATURE UNITS
CONFIGURATION
For temperature, the units of measure can be
congured using BACnet. By writing to the units
property of the temperature sensor (AI0), the
reported temperature units can be changed.
TABLE 5 shows the values to write.
TEMPERATURE AND RH OFFSET (Continued)
These are set by writing to the present value of the Temperature Calibration Oset (AV0) or RH Calibration
Oset (AV1). The value written must be within the specied range or an error will be returned. To set back
to factory settings, write any changed values to 0.
Version: 2.0
I0000932

TEMPERATURE AND RH OFFSET
This device allows for a temperature oset of
+/-5C (9F) and an RH oset of +/-10%. By default,
these values are set to 0, meaning no oset is
added.
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 6
LED INFORMATION
One LED indicates four statuses. Solid green
shows that power is good, but no data is
transmitting. A solid Amber indicates that
auto-baud is set and no data has been received to
set a baud rate. Green/Amber ashing indicates
data is being transmitted or received. Solid Red
LED status indicates an error state, usually loss of
communication on the network. If BACnet is the
selected protocol, and this status remains for 10
times the APDU timeout, the device will
automatically reset. If this state remains longer
than that, reset the device.
ADDRESS SELECTION
Switches 1-7 are used to set the BACnet and
Modbus addressing. Refer to TABLE 4 for switch
settings. Each device in a network branch must
have a unique address. The value of each position
is printed on the board. By default, the address is
(0). Note: (0) cannot be used if Modbus RTU
protocol is selected and will require a unique
address. If the device is powered when a change
is made, the device must be power cycled or reset
for changes in address to be made.
DEVICE CONFIGURATION
THROUGH BACnet
DEVICE INSTANCE
The Device Instance, by default, is 1035000 plus
the Address. For example, an Address of 21 results
in a default address of 1035021. This can be
changed once the device is connected to the
network, but each device instance must be
unique within the network, not just this segment.
DEVICE NAME
By default, the device name is based on the type
of device and the address. The device name can
be a character string up to 32 characters in length.
This can be changed once the device is connected
to the network. For example: Temperature Sensor
- 034. The device name must be unique
throughout the entire BACnet network, not just
this segment.
PAR 2
0
0
1
1
PAR 1
0
1
0
1
Mode (Databits-Parity-Stop Bits)
8-Even-1
8-Odd-1
8-None-2
8-None-1 (Non-Standard)
TABLE 7: PARITY AND STOP BITS
Note: The table shows all objects for Temperature and RH. If you have a Temperature only model, the RH objects(AI-1 and
AV-1) will not be present. If you have a RH only model, the Temperature objects (AI-0 and AV-0) will not be present.
OBJECT TYPE
Device
Analog
Inputs
Analog
Values
BACnet ENGINEERING UNITS
- - - - - - - - - - - - - - - - - - - - - - - - - -
degrees-Fahrenheit (64) - default
percent-relative-humidity (29)
delta-degrees-Fahrenheit (120)
percent-relative-humidity (29)
PIC STATEMENT QRRANGE
0-4194302
34.7 - 122.0
0.0 - 95.0
-9.0 - 9.0
-10.0 -10.0
OBJECT NAME
BN211x0
Temperature Sensor
RH Sensor
Temperature
Calibration Oset
RH Calibration Oset
OBJECT ID
- - - - - - - - - -
AI-0
AI-1
AV-0
AV-1
TABLE 6: BACnet OBJECT TABLE
DEVICE CONFIGURATION THROUGH MODBUS RTU
MODBUS RTU DATABITS,
PARITY, AND STOP BITS
SELECTION
Conrm Modbus Protocol is selected via
dipswitch #4 on SW4 - see FIGURE 6 (P.4). The
device that requests information is called the
Modbus Master and the devices giving the
information are Modbus Slaves. The Modbus
sensors are slave devices and the number of Data
Bits needs to be the same as in the Master device
conguration. ACI’s Modbus RTU sensors utilize 8
data bits during communication exchange.
Parity and stop bit selection is performed via the
SW4 switch located on the board. Dipswtiches #1
and #2 are adjusted to select the parity and stop
bits - see TABLE 7. Where (0) is OFF and (1) is ON.
If BACnet protocol is selected these dipswitches
are irrelevant.
TEST MODE Modbus RTU
There are 5 data values in test mode. Coil 1001,
Holding Registers (HR) 1001 and 1002, and the
Input Registers (IR) 0003 and 0004 for Temp and RH
values. When Coil 1001 is enabled, reading IR 0003
and 0004 will respond with the values in HR 1001
and 1002, other wise they will respond with the
actual sensor values. General process for this is to
write initial test values to HR 1001 and 1002, Enable
Coil 1001 and then read as normal from IR 0003 and
0004. While Coil 1001 is enable, it is possible to
write a change of value to IR 1001 and 1002, which
will be reected in the next read from IR 0003 and
0004. When testing completed, disable Coil 1001.
The status of Coil 1001 and HR 1001 and 1002 are
not persistent between reset/power cycle.
TEST MODE BACnet
For the Sensor objects (AI0 and AI1), a test mode
can be set by writing the Boolean value true to the
“out-of-service” property. Then the present-value
can be set to any valid test value the user requires.
This allows a user to test reactions to specic
values returned by this device.
DEVICE LOCATION
The device location is optional but is intended to
allow for further denition of the device’s location.
The device location can be a character string up to
64 characters in length.
DEVICE DESCRIPTION
By default, the device description is optional but is
intended to allow for further information about
the device or its environment. The device location
can be a character string up to 64 characters in
length.
TEMPERATURE UNITS
CONFIGURATION
For temperature, the units of measure can be
congured using BACnet. By writing to the units
property of the temperature sensor (AI0), the
reported temperature units can be changed.
TABLE 5 shows the values to write.
TEMPERATURE AND RH OFFSET (Continued)
These are set by writing to the present value of the Temperature Calibration Oset (AV0) or RH Calibration
Oset (AV1). The value written must be within the specied range or an error will be returned. To set back
to factory settings, write any changed values to 0.
MODBUS RTU MAP
Version: 2.0
I0000932
1001 0 = Disable Test Mode. IR3 and IR4 will read with current Sensor
Value.
1 = Enable Test Mode. IR3 and IR4 will read with the values stored
in HR1001 and HR1002 .
Test Mode Enable1000
REFERENCE DESCRIPTIONNAMEADDRESS
COILS CL

Page 7
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
1
2
3
4
2001
2002
2003
2004
9001
9002
9003 Thru
9006
9007 Thru
9010
9011 Thru
9016
For each bit location:
0 = Sensor not present
1 = Sensor present
Bit 0 - Temperature Sensor
Bit 1 - RH sensor
N/A
For example, a value of 312 would represent 31.2 Degrees of the
units selected in HR1. Signed Integer.
For Example: A value of 429 would represent 42.9% Relative
Humidity.
Temperature range Minimum value (Tenths). Signed Integer.
Temperature range Maximum value (Tenths). Signed Integer.
Relative Humidity range Minimum value (Tenths)
Relative Humidity range Maximum value (Tenths)
Always reads a value of 54321. For testing proper communication
and interpretation of values.
Always reads a value of -12345. For testing proper communication
and interpretation of values.
Always reads a string value of "-123.45" (Null terminated). For
testing proper communication and interpretation of values.
Non-null terminated character string of the Serial Number. For
example, "12345678”
Non-null terminated character string of the Firmware Version. For
example, "02.00.000.90"
Sensors Present
Reserved
Temperature Sensor
Value
RH Sensor Value
Temperature Range
Min
Temperature Range
Max
RH Range Min
RH Range Max
Unsigned Integer
Test Value
Signed Integer Test
Value
Test String Test Value
Serial Number
Firmware Version
0
1
2
3
2000
2001
2002
2003
9000
9001
9002 Thru
9005
9006 Thru
9009
9010 Thru
9015
1
2
3
Value - Units:
62 - Degrees Celsius
63 - Degrees Kelvin
64 - Degrees Fahrenheit
Temperature Oset Value (Tenths) Signed Integer.
User can set an oset that will be added to Temperature sensor and
reected in IR3. Range of -5.0 to 5.0 degrees Celsius/degrees Kelvin
(-9.0 to 9.0 degrees Fahrenheit).
For example, writing -16 would add an oset of -1.6 degrees.
Relative Humidity Oset (Tenths)
User can set an oset that will be added to RH sensor and reected
in IR4. Range of -10.0 to 10.0 %RH.
For example, writing -16 would add an oset of -1.6 %RH.
Temperature Units
Temperature Oset
Value
RH Oset Value
0
1
2
INPUT REGISTER IR
HOLDING REGISTER HR
1001
1002
User can set what temperature value (Tenths) that would be
returned when reading IR3 and Test Mode is Enabled in CL1001. For
Example -400 would be -40.0.
User can set what RH value (Tenths) that would be returned when
reading IR4 and Test Mode is Enabled in CL1001.
Test Mode
Temperature Value
Test Mode RH Value
1000
1001
Version: 2.0
I0000932

PRODUCT SPECIFICATIONS
12 to 36 VDC / 24 VAC +/- 10%, 50/60 Hz (Reverse Polarity Protected)
25 mA maximum (0.67 VA)
-22 to 176°F (-30 to 80°C)
-40 to 302°F (-40 to 150°C )
@ 77°F (25°C): +/- 1.0°F (+/- 0.5°C)
+/- 9°F (+/- 5°C) (Field Congurable)
BACnet MS/TP or Modbus RTU = Field Selectable; EIA RS-485
0 to 127 (0 (Default - Must be changed if Modbus RTU is selected protocol);
Field Selectable)
Auto Baud (Default, BACnet Only), 9600, 19200, 38400, 57600, 76800, 115200
(Field Selectable)
1035000 + Address (example: Address 127 = 1035127; Field Congurable)
None/Even/Odd = Field Selectable
1 or 2 = Field Selectable
8
Screw Terminal Blocks / 16 AWG (1.31 mm2) to 22 AWG (0.33 mm2)
0.45 lbf-in (0.5 Nm) nominal
“-PB” Enclosure: ABS Plastic, UL94-HB, Plenum Rated
Supply Voltage:
Current Consumption:
Operating Temperature Ranges
Transmitter:
Sensor:
Temperature Measurement Accuracy:
Temperature Calibration Oset:
Communication Protocol:
Sensor Addresses:
Supported Baud Rates:
Device Instance Number:
Parity (Modbus RTU)
Stop Bits (Modbus RTU)
Databits (Modbus RTU)
Connections / Wire Size:
Terminal Block Torque Rating:
Enclosure Specications:
Page 8
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
9001 Thru
9016
9017 Thru
9048
9049 Thru
9080
Device Name, Device Location, and Device Description are user
settable character strings (Null terminated) that can be used to allow
for system customization and device identication.
For example:
Device Name (Modbus 9001 thru 9016) could be set to a system ID:
"S2253"
Device Location (Modbus 9017 thru 9048) could be set to:
"Building 5, Floor 2, Duct 3"
Device Description (Modbus 9049 thru 9080) could be set to:
"Cold air return sensor"
Device Name
Device Location
Device Description
9000 Thru
9015
9016 Thru
9047
9048 Thru
9079
Version: 2.0
I0000932
BACnet is a registered trademark of ASHRAE. ASHRAE does not endorse, approve or test products for compliance with ASHRAE standards. Compliance of listed products to the requirements of ASHRAE
Standard 135 is the responsibility of BACnet International (BI). BTL is a registered trademark of BACnet International.
8’and 12‘ Lengths: Four
Copper: -40 to 80 °C (-40 to 185 °F)
Copper: -30 to 90 °C (-22 to 194 °F)
Copper: 10 to 95% RH, non-condensing
Copper: Copper | 0.210”(5.34 mm)
Copper: 22 AWG (0.65 mm)
“-PB”Enclosure: ABS Plastic, UL94-HB, Plenum Rated
24’and 50‘ Lengths: Nine
Flexible: -20 to 75 °C (-4 to 167 °F)
Flexible: 0 to 75 °C (32 to 167 °F)
Flexible: 10 to 90% RH, non-condensing
Flexible: Low Smoke PVC | 0.170”(4.32 mm)
Flexible: 22 AWG (0.65 mm)
Number Sensing Points:
Storage Temperature Range:
Operating Temperature Range:
Operating Humidity Range:
Probe Material | Diameter:
Wire Size
Enclosure Specications