BASstat221 - BACnet Communicating Thermostat for Multi-Stage Heating/Cooling

The BASstat series of BACnet-compliant wired or wireless communicating thermostats are BTL listed to ensure effortless integration into BACnet/IP (Wi-Fi) or BACnet MS/TP (EIA-485) networks. These thermostats are suited for single or multi-stage heating, cooling and ventilation binary output control applications such as RTU or AHU. Configurable control algorithm parameters allow adaptability to the specific application. Adaptive control algorithm applied to multi-stage on/off control saves energy and ensures seamless comfort for the occupants. Built-in temperature sensor, input for remote temperature sensor, or temperature override network command from Building Automation System. Occupancy status can be set from thermostat buttons or over the BACnet network. Thermostat buttons are optionally lockable to prevent unauthorized control. Digital display with graphical icons is easy to read and understand.

Versatile Communication in Two Distinct Models

• Both models are BTL listed with B-ASC device profile
• BACnet MS/TP in B2 model: MS/TP baud rates 9.6 kbps - 76.8 kbps
• BACnet/IP in BW2 model: 802.11 b/g/n 2.4GHz Wi-Fi

Flexible Installation

• 24VAC (+/-10%) power input
• Digital Display with graphical icons of operation, °C or °F display
• Single or Multistage, Binary Outputs for RTU or AHU applications
• Manual or Auto-changeover modes as well as Heat only or Cool only modes
• Occupied / Unoccupied modes with 2 sets of Cool/ Heat set points
• Effective run time accumulation for energy consumption calculations
• Built-in temperature sensor
• Remote temperature sensor input (NTC Thermistor 3kO)
• Networked current temperature override from BACnet client (BMS)
• Fully Configurable Algorithm control parameters: Deadband, Proportional Gain, Integral Rate, Stage Trip Points, Stage Widths, Short Cycle Delay, Maximum Cycles Per Hour
• Non-volatile memory (EEPROM) retains user settings during power loss
• Lockable buttons / user interface

Operating Environment and Wiring

• Operating Environment: 0-50°C, 5-95% RH (non-condensing)
• Wiring: 14 to 22 AWG wires or up to 2 x 1.5 mm wires
• Dimensions: 94 x 118 x 34 mm (W x H x D)
• Mounts directly onto wall, panel, standard 65 x 65 mm junction box (hole pitch 60 mm) or standard 2 x 4 inch vertical junction box (hole pitch 83.5 mm)

BASstat — Overview

The BASstat's white backlit LCD display is large and easy to read, even from a distance. It incorporates graphical icons to aid visual indication of current state of operation. Several icons indicate parameters such as: Active Mode, Cooling stage 1 or 2, Heating stage 1 or 2, Ventilation Only, Fan Active, Occupied / Unoccupied state, and Clock icon to indicate Short Cycle Delay or Max Cycles per hour active waiting state. These icons are very useful in indicating the thermostat's current state of operation.

Six buttons on the BASstat allow users to manipulate temperature set point, change HVAC modes, turn the thermostat ON/OFF, and more. Pressing the Set and Up/Down buttons can manually toggle the thermostat from occupied/unoccupied modes, where BACnet occupancy command is not an option. All 6 of these buttons are lockable in a configurable manner to prevent unauthorized configuration change. Some or all buttons can be locked for application flexibility, making the stat suitable for applications where limited user control is allowed.

Icon Descriptions:

• Snowflake Icon: Indicates working in Cooling mode
• Rising Steam Icon: Indicates working in Heating mode
• Wind Icon: Indicates working in Ventilation mode
• Working Icon: Indicates mechanical Cooling/Heating Stage is engaged
• Fan Status Icons: Indicate Fan status (AUTO or Continuous). AUTO mode has a spinning fan icon.
• DP Icon: Displays temperature set-point while running
• Sun Icon: Indicates Occupied status
• Moon Icon: Indicates Unoccupied Status
• Clock Icon: Indicates Short Cycle Delay or Max. Cycles per Hour for mechanical stages
• MODE Button: Changes modes Heat/Cool/Auto/Off and used for accept/confirm button in Engineering menu.
• FAN Button: Toggle to change Fan mode (AUTO or Continuous)
• UP & DOWN Buttons: Increase & decrease setting or previous/next item. Hold both buttons for 5 sec. to enter Engineering mode.
• SET Button: Toggle Occupied/Unoccupied Setting
• ON/OFF Button: Turn thermostat On or Off

Configuration

Initial configuration differs depending on whether you are using the BACnet MS/TP model or BACnet/IP over Wi-Fi model. Full details can be found in the installation guide included in the product box or in the User Manual available on the Contemporary Controls website. All configuration parameters are settable through the buttons on the thermostat and the engineer menu, or once installed on the BACnet network with unique device parameters, configuration can be altered using BACnet commands. Network command-based configuration can also be accomplished on the bench using a BACnet router (B2 MS/TP model) or Wi-Fi enabled laptop/computer (BW2 Wi-Fi model).

B2 model - MS/TP Configuration

BACnet MS/TP model configuration requires setting the baud rate or using the default baud rate of 38.4 kbps. A unique MS/TP MAC address is required to distinguish it from other MS/TP devices on the bus (default MAC address is 1). When more than one BASstat is installed at the same time, their MAC addresses must be configured prior to installing on the MS/TP bus or communication will fail due to duplicate MAC addresses. A unique Device Instance Number throughout the entire BACnet internetwork is also required to distinguish the device from all other BACnet devices. The BASstat does not provide End-of-Line termination. If the BASstat is the first or last device on the MS/TP bus, a termination resistor (1200Ω) must be applied across pins 16 and 17 of the input terminal. Thanks to its EEPROM, the BASstat will store configuration in the event of power loss. All settings can be reset back to default from Engineering Menu item (rSt).

BW2 model - Wi-Fi Configuration

BACnet/IP Wi-Fi model requires connecting to the thermostat as an access point for initial configuration. A Wi-Fi enabled laptop/computer can discover the BASstat initially as a Wi-Fi access point with SSID "WiFi-122B-xxxx" and no passphrase by default (simply click to connect to Access Point). The digits "xxxx" in "122Bxxxx" are the last 4 digits of the thermostat's Wi-Fi chip MAC address found written on the back side. This can assist when multiple Wi-Fi stats are installed.

Once connected to the thermostat, open its web page by typing 192.168.0.1 with admin for username and no password. The Network Configuration page will be presented for network configuration. After initial connection using a laptop, the Wi-Fi mode in the thermostat can be changed to Infrastructure and the local Wi-Fi network configuration can be entered and stored. A reboot of the thermostat is required, and the new Infrastructure mode with new settings will be used. A unique Device Instance Number throughout the entire BACnet internetwork is required to distinguish the device from all other BACnet devices. When more than one BASstat is installed at the same time, their Device Instance Number must be configured prior to connecting to the BACnet/IP network or BACnet communication will fail due to duplicate instances. Thanks to its EEPROM, the BASstat will store configuration in the event of power loss. If configuration fails or the thermostat needs to be configured to use a different Wi-Fi access point, the thermostat must be reset and reconfigured. Reset will restore all values to default and can be selected from Engineering Menu (rSt).

BACnet Protocol Implementation Conformance (PIC) Statement

CONTEMPORARY CONTROLS BASstat

BACnet MS/TP and BACnet/IP Thermostat Controller

BACnet Protocol Implementation Conformance Statement (Annex A)

• Date: September 24, 2018
• Vendor Name: Contemporary Controls
• Product Name: BASstat
• Product Model Number: BAST-221C B2 and BW2
• Firmware Revision: 1.40
• Product Description: These series of thermostats/controllers are suitable for a variety of applications including RTU, AHU, Unit Heaters, and other HVAC unitary equipment of on/off controls.

BACnet Standardized Device Profile (Annex L):

• BACnet Advanced Application Controller (B-ASC)

List all BACnet Interoperability Building Block Supported (Annex K):

• DS-RP-B Data Sharing - ReadProperty - B
• DM-DDB-B Device Management - Dynamic Device Binding - B
• DS-WP-B Data Sharing - WriteProperty - B
• DM-DDB-B Device Management - Dynamic Object Binding - B
• DS-RPM-B Data Sharing - ReadPropertyMultiple - B
• DM-DCC-B Device Management - Device Communication Control - B

Segmentation Capability:

• Able to transmit segmented messages
• Window Size:
• Able to receive segmented messages
• Window Size:

Standard Object Types Supported:

No optional properties are supported.

Data Link Layer Options:

• BACnet IP, (Annex J)
• BACnet IP, (Annex J), Foreign Device
• ISO 8802-3, Ethernet (Clause 7)
• ANSI/ATA 878.1, EIA-485 ARCNET (Clause 8), baud rate(s):
• MS/TP master (Clause 9), baud rate(s):
• MS/TP slave (Clause 9), baud rate(s):
• Point-To-Point, EIA 232 (Clause 10), baud rate(s):
• Point-To-Point, modern, (Clause 10), baud rate(s):
• LonTalk, (Clause 11), medium:
• Other:

Device Address Binding:

Is static device binding supported? (This is currently necessary for two-way communication with MS/TP slaves and certain other devices.) No

Networking Options:

• Annex H, BACnet Tunnelling Router over IP
• BACnet/IP Broadcast Management Device (BBMD)
• Does the BBMD support registrations by Foreign Devices? No

Character Sets Supported:

• ISO 10646 (UTF-8)
• ISO 10646 (UCS-2)
• ISO 10646 (UCS-4)
• JIS C 6226

If this product is a communication gateway, describe the types of non-BACnet equipment/network(s) that the gateway supports: No gateway support.

Wiring Diagram

Wiring: 14 to 22 AWG wires or up to 2 x 1.5 mm wires.

Mounts directly onto wall, panel, standard 65 x 65 mm junction box (hole pitch 60 mm) or standard 2 x 4 inch vertical junction box (hole pitch 83.5 mm).

EIA-485 connection to pins 16(+) and 17(-) applicable to B2 - BACnet MS/TP model only. BW2 model uses Wi-Fi connectivity.

Dimensions

Width: 94 mm, Height: 118 mm, Depth: 34 mm.

Mounts directly onto wall, panel, standard 65 x 65 mm junction box (hole pitch 60 mm) or standard 2 x 4 inch vertical junction box (hole pitch 83.5 mm).

Specifications

Electrical

• Input: AC only
• Voltage (V, ±10%):
• Power: 5 VA
• Frequency: 47-63 Hz

Environmental/Mechanical

• Operating temperature: 0°C to +50°C
• Storage temperature: -40°C to +85°C
• Relative humidity: 5-95%, non-condensing
• Protection: IP30
• Weight: 0.44 lbs. (0.2 kg)
• Regulatory Compliance: CE Mark; RoHS
• BW2 model Wi-Fi FCCID: P53-EMW3165-P

Electromagnetic Compatibility

The BAST-221C complies with the following specifications and bears the CE mark in accordance with the provisions of the Electromagnetic Compatibility (EMC) Directive 2004/108/EC based on the following specifications:

Ordering Information

Contact Information

United States

Contemporary Controls Systems, Inc.
2431 Curtiss Street
Downers Grove, IL 60515
USA

Tel: +1 630 963 7070
Fax: +1 630 963 0109
info@ccontrols.com

China

Contemporary Controls (Suzhou) Co. Ltd
11 Huoju Road
Science & Technology Industrial Park
New District, Suzhou
PR China 215009

Tel: +86 512 6809 5866
Fax: +86 512 6809 3760
info@ccontrols.com.cn

United Kingdom

Contemporary Controls Ltd
14 Bow Court
Fletchworth Gate
Coventry CV5 6SP
United Kingdom

Tel: +44 (0)24 7641 3786
Fax: +44 (0)24 7641 3923
info@ccontrols.co.uk

Germany

Contemporary Controls GmbH
Fuggerstraße 1 B
04158 Leipzig
Germany

Tel: +49 341 5203590
Fax: +49 341 52035916
info@ccontrols.de

www.ccontrols.com