Installation manual

3
Reference Manual
00809-0100-4075, Rev CA
Section 1: Introduction
March 2014
Introduction
1.2.2 Features
 An installation-ready solution that provides rich wireless HART
®
data
 Works with any 2- or 4-wire HART devices
 Flexibility to meet your most demanding applications
 Wireless output with >99% data reliability delivers rich HART data, protected by
industry leading security
 Gain access to additional HART information, such as diagnostics or multi-variable data
 Add wireless to almost any measurement point without affecting the approval of the
sub-device
 IEC 62591 (WirelessHART
®
) capabilities extend the full benefits of PlantWeb
™
to
previously inaccessible locations
1.3 Considerations
1.3.1 General
The Smart Wireless THUM Adapter is connected to a HART sub-device. With simple HART
configuration, the THUM transmits the HART information from the sub-device into the Wireless
network.
1.3.2 Commissioning
The THUM can be commissioned before or after installation. It may be useful to bench
commission the THUM before installation to ensure proper operation and to become familiar
with the functionality. The instruments should be installed in accordance with intrinsically safe
or non-incendive field wiring practices, when required. The THUM Adapter is powered when
connected to a powered loop.
1.3.3 Mechanical
When choosing an installation location and position for the transmitter, take into account
access to the device. For best performance, the antenna should be vertical and have some space
between objects in a parallel metal plane such as a pipe or metal framework, as the pipes or
framework may adversely affect the performance of the antenna.
1.3.4 Electrical
The THUM Adapter is connected into a powered 4–20 mA loop, powering itself by scavenging
power. The THUM Adapter causes a voltage drop across the loop. The drop is linear from 2.25
volts at 3.5 mA to 1.2 volts at 25 mA, but does not effect the 4–20 mA signal on the loop. Under
fault conditions, the maximum voltage drop is 2.5 volts.
1.3.5 Environmental
Verify that the operating environment of the transmitter is consistent with the appropriate
hazardous locations certifications.