LPT-M Modbus® Transmitter

For monitoring: Carbon monoxide, Nitrogen dioxide, Methane, Propane, Hydrogen, TVOCs

3 channel, digital (Modbus®) gas detector

Applications

Parking Facilities
Arenas and Pools
Chiller Rooms
Manufacturing Plants
Maintenance Facilities
Food Processing Plants
and many more...

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Key Features

3 channel operation
Modbus® RS-485 RTU communication
LCD display
One 2A SPDT dry contact relay
Internal audible alarm
24 VAC/VDC power
4-conductor daisy chain network wiring
Unobtrusive calibration and menu navigation using a magnetic wand
Optional display heater for cold environment applications
Standard water / dust tight, corrosion resistant enclosure (drip proof)
IP54 rated with optional splash guard installed.

Description

The LPT-M is a full featured, 3 channel, digital transmitter for use in non-hazardous, non-explosion rated, commercial and light industrial applications. It may be configured to operate as a standalone fixed system or be part of a digital network. It offers a Modbus® RS-485 RTU output signal for communicating with a Controller and/or a Building Automation System, an audible internal alarm, one SPDT dry contact relay, LCD display with user selectable functions, temperature compensation and thermal resetting fuses all in a RoHS compliant package.

The LPT-M comes in a standard water / dust tight, corrosion resistant ABS / polycarbonate enclosure with a hinged, secured door. With the optional, factory installed splash guard the enclosure is IP54 rated and provides protection in water spray or wash down applications. An optional heater is available for continued operation in cold environment applications.

Specifications

Target Gas

Internal Gas Sensors

Carbon monoxide (CO) and Nitrogen dioxide (NO2)

Remote Catalytic Sensors

Hydrogen (H2), Methane (CH4) or Propane (C3H8)

Remote PID Sensors

TVOCs

Remote Infrared Sensors

Propane (C3H8)

Remote Transmitters

add an analog LPT or CGAS-A transmitter

Mechanical

Enclosure

ABS / Polycarbonate, corrosion resistant

Copper coated interior to reduce RF interference

IP54 rated with optional splash guard installed

Weight

363 g / 0.8 lbs

Size

127 x 127 x 71 mm / 5.0 x 5.0 x 2.8 inches

User Interface

Display

Graphic LCD, green border

Magnetic switches to initiate calibration without opening the enclosure

Input/Output

Output

Modbus® RS-485 RTU

Relay

One SPDT dry contact, rated 30 Volts, 2 Amps max

Audible Alarm

Standard internal buzzer, enable/disable, rated 90 dB @ 10 cm / 4 in

Electrical

Power Requirement

16-30 VDC, 3 W, Class 2

12-27 VAC, 50-60 Hz, 3 VA, Class 2

Current Draw

30 mA (buzzer & relay energized, 2 sensors)

Wiring

LAN Modbus® RTU (version 1.1b3) RS-485, 16 gauge, 4-conductor shielded network wiring (daisy-chain)

Fuses

Thermal, resetting

Environmental

Operating Temperature

-20°C to 40°C (-4°F to 104°F)

Operating Humidity

15 - 90% RH non-condensing

Certifications

Conforms to

CSA-C22.2 No. 205-12 / UL508 (Edition 17):2007

EMC Directive 2004/108/EC, EN 50270:2006, Type 1, EN61010

FCC. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

RoHS compliant circuit boards

Product Codes

LPT-M-TCO-NO2B-R

Three channel, internal electrochemical 6-year carbon monoxide (CO) sensor (0 - 200 ppm range) and internal electrochemical 6-year nitrogen dioxide (NO2) sensor (0 - 10 ppm), must add ESH-A remote sensor, LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-M-TCO-NO2B-RT

Three channel, internal electrochemical 6-year carbon monoxide (CO) sensor (0 - 200 ppm range) and internal electrochemical 6-year nitrogen dioxide (NO2) sensor (0 - 10 ppm), must add a remote CGAS-A or CGAS-AP or AST-IS CO2 Analog Transmitter, LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

Factory Options

-H

Internal heater for the display for improved usability in cold environment applications down to -40°C / -40°F

-L2

Enclosure mounted (on side), strobe with audible, 40 mm / 2 in dia, 80 flashes per min, siren volume 85 dB, drip proof

-S

Splash guard, factory installed, IP54 rating

Remote Sensors

ESH-A-CH2-100

Catalytic Hydrogen (H2) ESH-A Remote Sensor (0 - 100% LEL), water / dust tight enclosure

ESH-A-CCH4-100

Catalytic Methane (CH4) ESH-A Remote Sensor (0 - 100% LEL), water / dust tight enclosure