Specifications

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Viconics Wireless Thermostat Controller System Overview
A Viconics Wireless Thermostat Controller System consists of:
A supervisory controller
At least one VWG-40 Coordinator
Multiple Viconics Wireless Thermostat Controllers
Component Descriptions
Supervisory Controllers (building automation system)
The Viconics Wireless Thermostat Controller System interfaces
with Web-enabled, Ethernet-based, supervisory controllers that
connect BAS networks to IP networks and the Web. Supervisory
controllers provide scheduling, alarm and event management,
trending, energy management, data exchange, dial-out capability,
and password protection with a computer running Microsoft
®
Internet Explorer
®
Web browser.
VWG-40 Coordinators
A VWG-40 Coordinator provides a wireless interface between
a supervisory controller and the Viconics Wireless Thermostat
Controllers, allowing the exchange of BACnet IP (VWG-40-
IP-1000 model) or BACnet MS/TP (VWG-40-MSTP-1000 model)
messages. The VWG-40 Coordinator initiates the formation of
the wireless mesh network - one is required per wireless mesh
network. Each VWG-40 Coordinator and the Viconics Wireless
Thermostat Controllers assigned to it share a "Personal Area
Network Identification" (PAN ID). A VWG-40 Coordinator requires
a 15 VDC power source. An optional remote-mount antenna and
cable is available to allow transmission when the coordinator is
mounted inside a metal panel.
A VWG-40 Coordinator enables the Viconics Wireless Thermostat
Controllers to communicate with the supervisory controller, which
schedules zone occupancy of the wireless system, collects trend
data, overrides points, and monitors alarms. The Viconics Wireless
Thermostat Controller System confirms and synchronizes
data transmissions between the Viconics Wireless Thermostat
Controllers and VWG-40 Coordinators.
Together, these components provide wireless monitoring and
temperature control of building Heating, Ventilating, and Air
Conditioning (HVAC) equipment. Figure 1 illustrates a simple
Viconics Wireless Thermostat Controller System using a BACnet
MS/TP Version of the VWG-40 Coordinator
Viconics Wireless Thermostat Controllers
Depending on the model, the Viconics Wireless Thermostat
Controllers can communicate sensed temperature, setpoint
temperature, and other data with an associated supervisory
controller and control a variety of fan coil and zoning equipment.
The Viconics Wireless Thermostat Controllers are designed for
indoor, intra-building applications only. The Viconics Wireless
Thermostat Controllers can also serve as repeaters to extend the
range of the BACnet data communications within the wireless
mesh network.
Component Quantities
A Viconics Wireless Thermostat Controller System can support up
to:
• 100 Viconics Wireless Thermostat Controllers per MS/TP trunk
on the supervisory controller
• 254 Viconics Wireless Thermostat Controllers integrated through
BACnet IP on a supervisory controller
• 30 Viconics Wireless Thermostat Controllers per VWG-40
Coordinator
Each increment of 30 Viconics Wireless Thermostat Controllers
requires one additional VWG-40 Coordinator. Viconics Wireless
Thermostat Controllers can be added as repeaters, as required, to
extend range and provide redundant pathways. Viconics Wireless
Thermostat Controllers serving only as repeaters do not count
towards the totals shown in Table 1; however, indiscriminate use of
Viconics Wireless Thermostat Controllers as repeaters can lead to
reduced performance.
wireless
thermostat
controller
Supervisory
controller
coordinator
(BACnet MS/TP)
wireless
thermostat
controller
wireless
thermostat
controller
wireless
thermostat
controller
wireless
thermostat
controller
10 m (30 ft) through walls
30 m (100 ft) open space
recommended signal range
wireless
thermostat
controller
Figure 1
Battery connector
(Bottom board)
On board wireless adapter
with antenna connection
Antenna connector
LAN2
(SEC)
LAN2
(SEC)
Antenna connector
Battery connector
BACnet MS/TP port
(RS-485)
Connector for
coaxial power
Earth ground
spade lug
Battery in bracket
(On top of option
cards, if present)
BACnet IP ports (RJ-45 ethernet)
RJ-45 Ethernet ports LAN2 and LAN1 on top board.
RS-485 Port COM2 on bottom board.
LAN1
(PRI)
LAN1
(PRI)
Earth ground
spade lug
Coaxial powe
r
connector for
wall mounted
power modul
e
Serial port
not used
VWG-40 Coordinator (Cover Removed)
VWG-40 Coordinator Communications Port (Cover
Removed)
WIRELESS THERMOSTAT SYSTEM
VICONICS WIRELESS
March 2014