BACnet
b3865/866/885-V VAV
Controllers with Built-in Actuator
The Andover ContinuumTM b3865-V, b3866-V and b3885-V are
native BACnet controllers that communicate on an RS-485 field
bus as Master devices using the MS/TP BACnet protocol.
BACnet b3865/866/885-V VAV Controllers
with Built-in Actuator
Features
The controllers are highly intelligent,
low-cost VAV box controllers that come
equipped with a built-in actuator to
streamline hardware installation and save
commissioning time. Universal inputs, an
airflow sensor, Form A triac-based outputs,
and an integrated damper actuator
make these controllers perfect for VAV
applications. The b3865/866-V models
feature a room sensor input, which supports
our Andover Continuum Smart Sensor, or
any standard room temperature sensor.
02
PRODUCT AT A GLANCE
• Native BACnet MS/TP communications
•
Support for 18 BACnet object types, including
Trends, Schedules, Calenders, and Loops
•
Low-cost VAV control in compact package
• Built-in damper actuator simplifies
hardware installation
•
Universal inputs with Form A, Form K, and
analog outputs for flexible control options
•
Non-volatile Flash memory for application
program and operating system storage
•
Easy on-line software updates
• Local extended storage of log data
• On-board airflow sensor
• Optional Andover Continuum Smart
Sensor Display
•
Complies with B-AAC BACnet profile
• Support for Wireless BACnet Field
Bus communications
•
The b3865-V is the base model with four universal
inputs, an airflow sensor, three Form A triac-based
outputs, and an integrated damper actuator.
• The b3866-V model is identical to the b3865-V,
with the exception that it also offers damper
position feedback and two analog outputs to
control reheat valves, lighting ballasts, etc.
• The b3885-V has a reduced I/O point count for
smaller VAV applications.
• All VAV models feature Flash memory, user
memory for programs, and a fast (32-bit)
processor for faster can times, with plenty of
additional memory available for data logging of
your critical data.
b38 65-V b3866-V b38 85-V
Universal Inputs 4 4 2
Airflow Sensor Yes Yes Yes
Smart Sensor Inpu
Form A Triac Output s
Analog Outputs - 2 -
Integrated
Actuator
Service Port Yes Yes Yes
Wireless O ption Ye s Ye s Yes
t Yes Yes No
3 3 2
Yes Yes Yes
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BACnet b3865/866/885-V VAV Controllers
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03
Features
As native BACnet controllers, the b3865/866/885-V
models can communicate with other BACnet
devices on the MS/TP network, in strict
accordance with ANSI/ASHRAE standard 135-
2004. By connecting to the Andover Continuum
bCX1, the controllers, or other MS/TP devices can
share and gather data from the wider Ethernet/
IP network of controllers. Among those Ethernet
controllers can be Andover Continuum controllers
(BACnet or Andover Continuum Infinet) or third
party BACnet IP devices. All Andover devices,
both BACnet and Andover Continuum Infinet,
are fully compatible with the Andover Continuum
CyberStation front-end software, a fully native
BACnet Operator Workstation (B-OWS) application.
(continued)
A Highly Intelligent Controller
Andover Continuum field controllers are highly
intelligent and the VAV models are no exception.
TAC designs the Andover Continuum field
controllers to handle schedules, alarms and trends
locally so there is no reliance on any supervisory
controllers. Since each controller is programmable
and can operate independently, the Andover
Continuum is highly reliable. Furthermore, each
controller is “peer-to-peer” and can share data
with any Andover Continuum or third party BACnet
controller.
Optional Wireless BACnet
The b3865/866/885-V BACnet controllers can
also communicate using a wireless mesh BACnet
network. Simply plug Andover Continuum Wireless
Adapters into the service ports of the BACnet
controllers with wireless compatible firmware to
create a wireless mesh network that sends and
receives BACnet messages. Because the native
BACnet communications are used wirelessly, the
bCX1 connects the entire wireless BACnet network
to the wired BACnet networks in your system,
regardless of manufacturer.
Increased Reliability with Flash Memory
The non-volatile Flash memory stores your
operating system and application programs, so
that in the event of a power loss, your application
is restored when power is returned. In addition,
the Flash memory allows for easy upgrades of
your operating system via software downloads,
eliminating the need to swap out memory chips.
Each controller, except the b3885-V, includes an
on-board battery to safeguard your runtime data —
Dimension Drawing
protecting all point data and log data from being
lost if power is removed.
Inputs
The inputs consists of two or four full-range
Universal inputs that accept voltage (0-5VDC),
digital (on/off), counter signals (up to 4Hz), or
temperature signals, plus an on-board air flow
sensor. The b3865/866-V models also offer
an additional input to support the Andover
Continuum Smart Sensor, or any standard room
temperature sensor.
Outputs
The b3865/866-V controllers contain three Form
A Triac-based outputs. The b3885-V controller
contains two Form A Triac-based outputs. These
outputs can be used separately for on/off or
pulsed control of lighting, heat, and fan units or
for bi-directional control of dampers and valves;
or configured into one Form K Tri-state output and
one Form A output. (Note: Any two consecutive
Triac outputs can be configured as a Form K
output.) Outputs are rated for AC loads only. The
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BACnet b3865/866/885-V VAV Controllers
with Built-in Actuator
04
Features
(continued)
b3866-V controller also offers two (0-10V) analog
outputs.
Damper Actuator
The integrated damper actuator allows simple
direct mounting of the controller directly over the
existing damper shaft. This eliminates the need
for separate mounting, wiring, and positioning
of the damper motor. Also, the actuator has a
built-in clutch button to temporarily disengage
the direct-drive gears during commissioning. The
controller actuator may be preset for a limited
range of motion using the mechanical “stops”
provided.
Software Capabilities
The dynamic memory of the b3865/866/885-V
controllers can be allocated for any combination
of programs, scheduling, alarming, and data
logging using the powerful Andover Plain
English programming language. Our objectoriented Plain English language with intuitive
keywords provides an easy method to tailor
the controller to meet your exact requirements.
Programs are entered into the controller using
Andover Continuum CyberStation. Programs
are then stored and executed by the controller.
Programming multiple b3865/866/885-V
controllers is inherently easy with Plain English.
A complete copy of one controller’s programs
can be loaded directly into other controllers
without changing any point names or programs.
Connection Labels
(LOW)
(HIGH)
2
3
4
5
6
7
8
9
10
11
(LOW)
(HIGH)
2
3
4
5
6
7
8
9
10
11
AIR FLOW
INPUT
CAUTION
IN 1 1
IN 2
RET
IN 3
IN 4
RET
SPWR
RET
IN 5
24 VAC
IN 1 1
IN 2
RET
IN 3
IN 4
RET
SPWR
RET
IN 5
24 VAC
MORE THAN ONE DISCONNECT
SWITCH MAY BE REQUIRED
TO DE-ENERGIZE THI S EQUIPMENT
BEFORE SERVICING.
UNIVERSAL
INPUT S
This equipment complies with part 15
of the FCC rules. Operation is subject
to the following two conditions.
(1) This device may not cause harmful
interference.
(2) This device must accept any
SMART
SENSOR
USE COPPER CO NDUCTORS ONLY
INPUT
:
CLASS 2 POWER ONLY
24VAC , 0.42 A, 10VA, 50/6 0HZ
AIR FLOW
INPUT
CAUTION
MORE THAN ONE DISCONNECT
SWITCH MAY BE REQUIRED
TO DE-ENERGIZE THI S EQUIPMENT
BEFORE SERVICING.
UNIVERSAL
INPUT S
This equipment complies with part 15
of the FCC rules. Operation is subject
to the following two conditions.
(1) This device may not cause harmful
interference.
(2) This device must accept any
SMART
SENSOR
USE COPPER CO NDUCTORS ONLY
INPUT
:
CLASS 2 POWER ONLY
24VAC , 0.42 A, 10VA, 50/6 0HZ
interference received, including
interference that may cause
undesired operation.
interference received, including
interference that may cause
undesired operation.
865-V
OUTPUTS
24V AC ,
866-V
OUTPUTS
0-10 VDC
OUTPUTS
24V AC ,
RS-485
PORT
DIGITAL
0.5A
RS-485
PORT
ANALOG
DIGITAL
0.5A
COM
COM
SHIELD
TRIAC REF
OUT5
OUT4
OUT3
COM
COM
SHIELD
A07
RET
AO6
TRIAC REF
OUT5
OUT4
OUT3
18
17
16
15
14
13
12
21
20
19
18
17
16
15
14
13
12
Smart Sensor Interface
The b3865/866-V controllers provide a builtin connection for an Andover Continuum
Smart Sensor. The Smart Sensor provides a
two-character LED display and a six-button
programmable keypad that enables operators
and occupants to change setpoints, balance
VAV boxes, monitor occupancy status, and turn
equipment on and off. An enhanced version of
the Smart Sensor is also available with a four-digit
custom LCD that provides the following icons:
PM, %, °, Setpoint, Cool, Heat, CFM, Fan, OA,
and SP.
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2
3
4
5
(LOW)
(HIGH)
IN 1 1
IN 2
RET
24 VAC
AIR FLOW
INPUT
UNIVERSAL
INPUT S
CAUTION
MORE THAN ONE DISC ONNECT
SWITCH MAY BE REQUIRED
TO DE-ENERGIZE TH IS EQUIPMENT
BEFORE SERVICING.
This equipment complies with part 15
of the FCC rules. Operation is subject
to the following two conditions.
(1) This device may not cause harmful
interference.
(2) This device must accept any
interference received, including
interference that may cause
undesired operation.
USE COPPER CO NDUCTORS ONLY
INPUT
:
CLASS 2 POWER ONLY
24VAC , 0.42 A, 10VA, 50/6 0HZ
885-V
RS-485
PORT
DIGITAL
OUTPUTS
24V AC ,
0.5A
COM
COM
SHIELD
TRIAC REF
NOT USED
OUT4
OUT3
12
11
10
9
8
7
6
BACnet b3865/866/885-V VAV Controllers
with Built-in Actuator
Specifications
b3865/866/885-V Controller
05
Electrical
Power
24 VAC, +10%-15%, 50/60 Hz,
Class 2 Limited Power
Power Consumption
Less than 10 VA
Overload Protection
Fused, MOV protected
Mechanical
Operation Environment
32° to 122°F (0-50°C),
10 - 90% RH (non-condensing)
Dimensions
7.75˝ W x 6.25˝ L x 2.5˝ H
(197 mm W x 159 mm L x 63 mm H)
Weight
2.50 lbs (1.04 kg)
Battery
Replaceable, rechargeable battery.
Provides 30 days typical accumulated
power failure backup of RAM memory.
All data stored in Flash on power loss.
Communications
RS-485 port for implementing
BACnet MS/TP connection, including:
Three-position removable screw terminal
Standard service port, four-position
shrouded connector
LEDs:
TD = Transmit Enable
RD = Received Data
Wired/Wireless Field Bus
RS-485 port for implementing
Wireless BACnet connection, including:
Standard service port, four-position
shrouded connector
User LEDs
Status Indicator LEDs:
CPU CPU Active
Green = Active
Airflow Input
Range
0 to 1˝ W.C. (0-250 Pa)
Resolution
0.0013˝ W.C. (0.33Pa) @ 73°F (23°C)
Accuracy
± 0.05˝ W.C. (12.50 Pa) @ 73°F (23°C)
Damper Shaft Mounting Screws
Torque Minimum
Varies according to shaft material
Torque Maximum
30 inch-pounds (3.4 Nm)
Hex Screws
10-32 (with supplied hex wrench)
Damper Actuator Motor
Shaft Diameter
1/2” (with a 3/8” adapter)
12.6 mm (with a 9.45 mm adapter)
Shaft Torque
53 inch-pounds (5.989 Nm)
Damper Speed
180 sec. @ 60 Hz and 216 sec @ 50 Hz:
for 90° adjustable end limits with two
set screws
Motor
Type: 24 VAC synchronous
Motor Protection: Mechanical clutch
Manual clutch over ride with a
push-button release
Hardware position feedback
(model b3866-V only)
Universal Inputs
Connections
Model b3865-V: Four inputs and
two returns
Model b3866-V: Four inputs and
two returns
Model b3885-V: Two inputs and
one return
Input Voltage Range
0 to 5.115 VDC
Input Impedance
10K ohm to 5.120 V
Input Voltage Resolution
5.0 mV
Digital Resolution
10 bits
Input Voltage Accuracy
± 15mV
Temperature Range
-30° to 230°F (-34° to 110°C)
Temperature Accuracy
± 1° F from -10° to 150°F
( ± 0.56°C from -23° to +66°C)
Counter Frequency
4 Hz @ 50% duty cycle
Input Protection
± 1000 V transients
Input Filter
16 Hz with one pole RC filter
Connector
Removable, 5 mm screw terminal
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BACnet b3865/866/885-V VAV Controllers
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06
Specifications
(continued)
b3865/866/885-V Controller
Smart Sensor Interface
Connections
Model b3865-V: One input,
SPWR, and return
Model b3866-V: One input,
SPWR, and return
Model b3885-V: Not available
Digital Outputs
Connections
Model b3865-V: Three triac outputs
and one reference
Model b3866-V: Three triac outputs
and one reference
Model b3885-V: Two triac outputs
and one reference
SPST Accuracy
0.1 second for pulse width modulation
Contact Ratings
0.5 A Maximum, 24 VAC
Connector
Removable, 5mm screw terminal
Analog Outputs
Connections
Model b3865-V: Not available
Model b3866-V: Two analog outputs
and one return
Model b3885-V: Not available
Analog Output Channels Required
Two, voltage only
Voltage Output Range
0 – 10 V
Output Source Current
5 mV Maximum
Voltage Output Load
2K ohm Minimum Impedance
Voltage Output Resolution
50 mV
Digital Resolution
8 bits
Output Voltage Accuracy
100 mV
Connector
Removable, 5mm screw terminal
Agency Listings
UL/CUL 916, FCC Rules and Regulations
CFR 47, Part 15, Class A, ICES-003,
AS/NZS 3548, European Union (EU)
Directive 2002/96/EC
Options
UL864, Smoke Control System Equipment,
UUKL (b3865-V-S, b3866-V-S, b3885-V-S)
Models
b3865-V
BACnet 865-V VAV Controller
b3866-V
BACnet 866-V VAV Controller
b3885-V
BACnet 885-V VAV Controller
b3865-V-WL
Wireless BACnet 865-V VAV Controller
b3866-V-WL
Wireless BACnet 866-V VAV Controller
b3885-V-WL
Wireless BACnet 885-V VAV Controller
All brand names, trademarks and registered trademar ks are the property of their respective owners. Information contained within this document is subject to
change without notice.
On October 1st, 2009, TAC became the Buildings Business of its parent company Schneider Electric. This document reflects the visual identity of Schneider
Electric, however there remains references to TAC as a corporate brand in the body copy. As each document is updated, the body copy will be changed to
reflect appropriate corporate brand changes.
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July 2018 gg
© 2007-2018 Schneider Electric. All rights reserved.
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