Installation Instructions
Space Humidity Transmitter
Catalog Number(s) 1414-CHD30PKDAA,
1414-CHZ30PKRAA, 1414-IHD20GKRAA,
1414-IHZ20GKRAA
About the Space Humidity Transmitter
The Relative Humidity transmitter uses a capacitive type humidity sensor for
reliable, accurate readings.
IMPORTANT
The humidity sensor used in this device is static sensitive.
Anti-static precautions should be followed to prevent damage to
the sensor.
Publication 1414-IN016A-EN-P - October 2005
2
Space Humidity Transmitter
Important User Information
Solid state equipment has operational characteristics differing from those of electromechanical equipment.
Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (Publication
SGI-1.1 available from your local Rockwell Automation sales office or online at
http://www.literature.rockwellautomation.com) describes some important differences between solid state
equipment and hard-wired electromechanical devices. Because of this difference, and also because of the
wide variety of uses for solid state equipment, all persons responsible for applying this equipment must
satisfy themselves that each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many
variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot
assume responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits,
equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell
Automation, Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
WARNING
IMPORTANT
ATTENTION
Identifies information about practices or circumstances that can cause an explosion in
a hazardous environment, which may lead to personal injury or death, property
damage, or economic loss.
Identifies information that is critical for successful application and understanding of
the product.
Identifies information about practices or circumstances that can lead to personal injury
or death, property damage, or economic loss. Attentions help you identify a hazard,
avoid a hazard and recognize the consequences.
SHOCK HAZARD
Labels may be located on or inside the equipment (e.g., drive or motor) to alert people
that dangerous voltage may be present.
BURN HAZARD
Labels may be located on or inside the equipment (e.g., drive or motor) to alert people
that surfaces may be dangerous temperatures.
Publication 1414-IN016A-EN-P - October 2005
Space Humidity Transmitter
3
Install the Space Humidity Transmitter
Transmitters can be mounted directly on a wall or to a wall box. For the most
accurate results, units should be mounted on an inside wall to a wall box,
approximately 3 to 5 feet from the floor, away from any supply air exhausts and
other sources of heat or cold. The enclosure cover is held in place with a locking
tab located to the left of center at the bottom of the enclosure. After installation the
cover can be locked on with the set screw (1/16” or 1.5 mm) at the bottom of the
enclosure.
Wire/Connect the Space Humidity Transmitter
Anti-static precautions should be followed to prevent damage to the device.
The transmitter should be connected to the controller using twisted-pair 18 to 22
AWG wire and requires two wires for DC 4 to 20 mA loop-powered operation. Use
shielded cable for the highest noise immunity. Do not route signal wires in the
same conduit with power cables as signal degradation may occur. The controller
Analog Input (AI) must be selected to match the transmitter output before power is
applied. The AI type must be a current input with 250 or 500 ohm impedance. All
transmitters have an operating range of 0 to 70 °C (32 to 158 °F) The transmitter
board should not be mounted where temperatures will exceed these values. See the
connection diagram for more details. The optional LCD display is powered by the
same supply as the transmitter.
Wire Connections For Relative Humidity Boards
The temperature sensor optional output is on the two terminals marked TEMP.
Typical wiring to a controller is shown in the connection diagram.
SPAN
Loop power supply
Z ER O
+
24 VDC
-
Analog Current Input
POWER
PWR
SIGNAL OUT
(SIG) OUT
ANL IN 0 +
COM
ANL IN 0 -
COMMON
ANL COM
RH Transmitter - Loop powered
Space Humidity transmitter
(with optional LCD)
For 4 to 20 mA loop signal, only the PWR and OUT terminals are used.
Publication 1414-IN016A-EN-P - October 2005
Specifications
Specification
Vaule
Transmitter Accuracy
+/-2, or 3% RH
Power Supply
24V dc
Wiring Connections
Screw connectors (18…24 AWG)
Output (scaled 0…100%)
4…20 mA
Operating Temperature
0 to 70°C (32 to 158°F)
All other trademarks are the property of their respective holders, and are hereby acknowledged.
Publication 1414-IN016A-EN-P - October 2005
Supersedes Publication XXXX-X.X.X - Month Year
PN 40055-246-01(1)
Copyright © 2005 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.
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