Notifier VA301C User Manual

VA301C

Offering unique zoning capabilities
which permit the averaging and
comparison of multiple sensor
readings

The VA301C continuously
monitors and controls
toxic gases, combustible
gases, and oxygen
hazards. Designed
for installation and
operational simplicity,
the VA301C reduces the
cost of installation and
ownership.

Using an addressable RS-485 Modbus
communication protocol, the 301C uses
daisy chain wiring requiring only 2 pairs of
wires to connect up to 96 transmitters on the

3 input channels. This simplies installation,

in turn lowering costs. The 301C’s zoning

and averaging abilities signicantly reduce

operational and maintenance costs.

User Friendly

Zero maintenance•
Automatic quick self-test and warm-up•
Continuous alphanumeric display •

Inexpensive and Reliable

Low installation costs•
Allows for up to 126 zoning groups which can save •

energy and extend fan and relay life
Manages up to 768 events with programmable •

latching alarms

Flexible Operation

Modbus compatible; with BACnet/IP available•
Interchangeable transmitters able to detect different •

gases
Expands to handle up to 96 transmitters or relay •

modules and up to 50 301W wireless sensors
Programmable time delays•
Integrated time clock enables scheduling of system •

operations

Safety Measures

Full array of visual indicators and integrated 65dBA •
alarm levels

Fully programmable relays (can be set as fail-safe •
or not)

Benecial Options

Available in a heavy duty industrial housing•
Datalogging option•

Zoning/Averaging Capabilities
Reduce Operational Costs

The 301C controller offers unique zoning
capabilities which permit the averaging and
comparison of multiple sensor readings.
Zoning can reduce operational costs by

ensuring that localized brief uctuations

registered at a single transmitter do not
activate relays. For example, a car idling in
a parking structure may locally increase a
reading at a nearby transmitter. Rather than
activating a fan as a result of the temporary

localized uctuation, zoning can be used

to limit relay activation until the average
reading for a zone exceeds a set-point.
This can reduce run time of fans, yielding
savings in both energy usage and wear and
tear. The 301C has the capacity to manage
input from three Modbus channels for up
to 96 transmitters and up to 50 wireless
transmitters which can be associated with
up to 126 zones. Transmitters can belong
to an unlimited number of zones, providing

maximum operational and control exibility.

General Specications

Use

Size

Weight

Power Requirement

Network Capacity

Communication Line
Lengths

Relay Output Rating

Alarm Levels

Time Delays

Outputs

Display

Operating Humidity
Range

Operating Temperature
Range

Ratings and Certications

Certied to

Conforms to

Modbus controller for centralized gas detection monitoring with real-time gas reading, selective alarm activation and low
cost of installation.

28 x 20.3 x 7 cm (11.02 x 7.99 x 2.76 in.)

1.1 kg (2.4 lb.)

17-27 Vac, 24-38 Vdc, 500 mA

Three Modbus channels for up to 96 transmitters, one wireless channel for up to 50 301W wireless transmitters and an
optional BACnet/IP output

Up to 609 m (2000 ft.) per channel
T-Tap: 20 m (65 ft.), maximum per T-Tap
40 m (130 ft.), maximum for all T-Tap combined

5 A, 30 Vdc or 250 Vac (resistive load)

3 fully programmable alarm levels

0, 30 sec., 45 sec., 1-99 minutes before and after alarm

4 DPDT relays (alarms and/or fault); 65dBA buzzer

Large 122 x 32 dot matrix display

0-95% RH, non-condensing

-20 to 50°C (-4 to 122°F)

CAN/CSA C22.2 No 61010-1

116662

ANSI/UL 61010-1
IEC 61010-1 Including Amendments A1:1992 +
A2:1995 and National Deviations (Canada, US)

Please Note:

While every effort has been made to ensure
accuracy in this publication, no responsibility
can be accepted for errors or omissions.
Data may change, as well as legislation, and you
are strongly advised to obtain copies of the most
recently issued regulations, standards, and guidelines.
This publication is not intended to form the
basis of a contract.
© 2007 Honeywell Analytics

H_301C_DS01015_V3

10/09

© 2009 Honeywell Analytics

HWA6075