Toxalert Tox540-28-IT User Manual

TOXALERT TM

Features

 Non-intrusive calibration, menu driven

system

 4-20mA, relay interface and Network

compatible with Modbus

 Local scrolling display

Benefits

Able to easily and quickly calibrate module without
declassifying the area

East to install in a variety of field applications plus easy
to obtain critical safety information wherever needed

For safe and reliable operation in hazardous areas

Meets long term reliability design standards

Ease of calibration and easy access to gas
concentration, relay status and diagnostics

IT Combustible Infrared

Sensor Module

Model TOX540-28-IT

Model

5600-25-IT

Proven Performance
Proven Technology
Proven Support

Information Technology (IT) at the component level! An

infrared (IR) Combustible Gas Sensor Module

the brilliance to provide, 4-20 mA or Modbus output. This
can be a stand alone module with the intelligence to
provide integral alarms, already loaded with features you
need. A gas detector with a
TOX540-28-IT provides all the built-in features desired by
instrumentation and safety professionals, including:

 Aluminum or 316 Stainless Steel enclosure
 Optional Integral 8 AMP alarm relays – Alarm,

Warning

 Integral scrolling LED display
 4-20mA output
 Modbus RTU RS-485 interface
 Option for non-Methane gas configuration
 Annual calibration frequency
 Remote alarm reset
 Optional remote sensor

The TOX540-28-IT can be used as a 4-20 mA
component or as a Modbus RTU node. For higher
level system capability the module can interface
directly to a Toxalert Controller. As part of a Toxalert
system the user gains capability of system integrity,
extensive diagnostic features, area and zone alarm
management.

Toxalert

pedigree. The

with

How It Works

Most combustible gases absorb infrared light energy at
defined wavelengths, providing an absorption signature
for that gas. The principle of an infrared detector is based
upon the absorption of the infrared light at a specific wave­length as it passes through the gas. The more of the ab­sorbing gas that is present, the more light is absorbed.
The detector measures the energy from an infrared light
beam at a wavelength that is absorbed by the gas and
compares it to the energy emitted by the source. The dif­ference in energy received by the detector indicates the
level of gas in the atmosphere.

TOXALERT INTERNATIONAL, INC. P.O. BOX 159, MOUND, MINNESOTA 55364 * [phone] * FAX [phone]

Visit our website at www.toxalert.com

TOXALERT INTERNATIONAL, INC. P.O. BOX 159, MOUND, MINNESOTA 55364 * [phone] * FAX [phone]

Visit our website at www.toxalert.com

Remote Sensor Option

It is often necessary to sample the combustible gas at
some distance from the gas sensor module. The IT Se­ries enables the user to mount the sensor remotely from
the transmitter without the need for expensive and high­maintenance sample pumps. The Remote Sensor Option
provides a separate gas sensor that can be mounted up
to 100 feet from the transmitter and connected via a
cable included.

Model Enclosure

TOX540-28-IT -XX

Relay/Connection

-XX

Gas Type

-XX

Remote

-X

- A1

- 01 = No Relays (Std.)

- 01 = Methane (standard)

- 0 = None (Standard)

- S1

- 02 = Relays/Option.

- 02 = Ethanol

- 1 = Remote Sensor Option

- 03 = Hart Protocol

- 03 = Propane

- 04 = Butane

- 05 = Ethylene

- 06 = Pentane

- 07 = Hexane

- 99 = Custom Type Refer to Factory

Sensor type: Infrared, Dual Wavelength
Performance:

Dual Range:
Default: 0-100% LEL Methane or Propane
User Setting: 0-100% by vol. Methane
Other Gases: % LEL Ethanol, Ethylene, Hexane,
Butane, Propane, Pentane
Repeatability: +/-1% LEL
Response Time: <10 sec.to 60% full scale
Accuracy: +/- 1% for 0-50% LEL range
+/- 2% for 51-100% LEL range
Sensor Life: Typically >5 years

Output:

Display: Fixed and Scrolling LED
Signal Output: Analog 4-20mA (Trouble 2.5 mA),
Calibration (1.5mA)
Serial Rs-485 Modbus RTU
Relay: 0.25 Amp. Trouble
Optional Relays: 8 amp Alarm, Warning
8A @ 250 VAC, 5A @ 30VDC

Electrical Data:

Power Consumption: 3 watts
Connection Type: 3 or 4 wire
Input Voltage: 24 VDC nominal 10-30 VDC

Operating Range:

Ambient Temp Range: -4° to 140°F
(-20° to 60°C)
Relative Humidity: 5-99%

Construction:

Dimensions: (A1) 8.1 x 4.8 x 4.9 in. (21 x 12 x 12 cm)
(S1) 7.5 x 4.4 x 4.9 in. (10 x 11 x 12 cm)
Weight: (A1) 2.7 lb. (1.3 kg) – (S1) 5.4 lb (2.7 Kg)
Housing: Epoxy Coated Aluminum or
316 Stainless Steel
Hazardous Area
Classification: Explosion Proof, Class I, Div. 1,
Groups B, C. D Class I, Zone 1
Group IIC, IP66, IP65, NEMA 4X
TA = - 40°C to 85°C II2 GD, Ex d IIC
Warranty: 1 year

Specifications subject to change without notice

Accessories

Rainshield
Rainshield with calibration port

TOX540-28-IT

Rev’d 05/11

Specifications:

Ordering Information