TEMPERATURE/HUMIDITY TRANSMITTER - WALL (4-20MA)

Description

The THW420 combination temperature/humidity transmitter is designed to meet applications that require local indication of both temperature and humidity in a single, aesthetically pleasing enclosure.

This device incorporates a 10K ohm (Ω) platinum RTD. The transmitter requires 24 VDC. The sensor provides an accurate and predictable four-wire, 4-20 mA output signal for temperature and a second 4-20 mA output signal for humidity.

Dimensions

 

FRONT

0.95"

VIEW

(241mm)

4.5"

 

(1143mm)

 

 

Wall

2.25"

0.75"

(572mm)

(191mm)

 

SIDE

 

VIEW

2.75"

 

(699mm)

 

TOP VIEW

 

Specifications

Output

4 to 20 mA

Sensor

10K Ω platinum RTD

Supply Voltage

24 VDC

Tolerance of Resistance

±1.5°F (±0.83°C)

(Accuracy)

±2% RH (from 15 to 95% RH)

Response Time

20 seconds for a 63% step

Environmental Operating

45°F to 96°F; 0 to 100% RH

Range (Transmitter)

(7°C to 35°C); 0 to 100% RH

Termination

The THW420 transmitter must be powered from a 24 VDC supply. The combination temperature/ humidity sensor is terminated as follows:

•The humidity transmitter requires a three-wire termination for the 4-20mA output using 24 VDC.

•The temperature sensor also requires a three- wire termination. In most cases, it obtains power from the analog input to which it is connected and no external power is required.

Though interference from external sources is not a major problem with current transmitters, Liebert recommends separating the wiring from line voltage wiring and from wiring used to supply highly induc- tive loads such as motors, generators and coils. Lie- bert also recommends making power connections with twisted pair wire of at least 22 AWG and crimp- type connectors.

 

 

 

 

 

 

 

Controller

 

SW2 OUTPUT SELECT

To GND (common)

 

Ground

 

 

 

 

 

ON

 

of controller*

 

 

 

 

4-20ma

Ch1

0-5V

 

From +24VDC

 

4-20 mA

 

 

 

 

 

 

 

4-20ma

Ch2

0-5V

 

 

Input #1

 

 

of controller or

 

 

 

 

 

 

 

+

 

RESIST.

Ch3

0-5V

 

power supply

To controller’s

 

RUN

%RH

CAL

 

 

 

-

 

 

 

 

analog input

 

 

 

 

 

 

 

4-20 mA

 

SW2

 

 

 

 

 

(temperature signal,

 

 

 

 

 

 

Input #2

 

 

 

 

 

 

 

4-20mA)

 

 

 

 

 

 

 

+

 

 

 

C9 Gnd

 

Ch1

Ch2

To controller’s

 

 

 

V+

-

 

 

 

X

 

 

 

analog input

 

 

 

 

 

 

 

(humidity signal,

 

 

 

 

J2

 

 

 

4-20mA)

 

 

DISPLAY CYCLE

 

 

 

 

 

 

IN SECONDS

 

 

 

* NOTE:

 

 

 

10

J3

 

 

 

 

 

3

 

20

CAL

Temp

Temp

The GND (common)

 

T

 

H Ch3

terminal is common

 

POT1

 

R19

 

between the Power

 

 

Building Automation

 

T&B

and Sensor

 

 

U3

Products, Inc.

 

 

 

 

 

Copyright 2000

 

 

SWITCH

 

 

 

 

 

REV. 101600

 

 

 

 

 

 

 

 

XCOMBO T&B

Short

 

 

 

 

 

 

 

 

 

 

 

 

J1

 

Norm

 

 

 

 

 

 

 

Open

 

 

 

 

 

 

 

 

SW1

+24VDC should be

 

RTH1 RTH2

 

 

 

used at all times

 

 

 

 

 

 

 

Terminations

 

 

 

 

!

CAUTION

 

 

 

 

 

Liebert recommends wiring the sensor

 

 

WITHOUT power applied because

 

 

accidental arcing may damage the product

 

and will void the warranty.

 

Ordering Information

Quantity

Part #

Description

THW420 Combination Temperature/Humidity Transmitter Wall 4-20 mA @ 45°F to 96°F and 0 to 100% RH

SL-31080 Product Specification/Installation Sheet

page 1

6/03 (Rev. 0)

Page 1 Page 2
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Image 1
Emerson SL-31080 specifications Description, Dimensions, Specifications, Termination, Ordering Information
Page 1 Page 2

SL-31080 specifications

The Emerson SL-31080 is a state-of-the-art smart thermostat designed to enhance the efficiency and comfort of home heating and cooling systems. With its user-friendly interface and advanced features, the SL-31080 stands out in the crowded smart thermostat market.

One of the main features of the Emerson SL-31080 is its compatibility with a variety of HVAC systems. It supports up to two-stage heating and cooling, making it suitable for homes with complex climate control needs. Its versatility extends to radiant heating systems, heat pumps, and conventional systems, ensuring that homeowners can integrate it into their existing setups with ease.

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The thermostat also includes a smart alert system that notifies users of temperature fluctuations and filter change reminders. This ensures that the HVAC system runs efficiently and effectively, minimizing the risk of breakdowns and prolonging its lifespan.

Another notable characteristic of the Emerson SL-31080 is its sleek and modern design, which fits seamlessly into any home decor. The large, easy-to-read display provides clear visuals of the current temperature and settings, enhancing usability.

With its combination of advanced technology, user-friendly features, and elegant design, the Emerson SL-31080 offers an ideal solution for homeowners seeking to enhance their climate control systems. Whether through remote access or smart learning capabilities, this thermostat stands ready to provide comfort and efficiency for any household.
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