18
The Interface Solution Experts
THZ & TDZ
Installation
Installation consists of physically mounting the unit
and completing the electrical connections.
Mounting the THZ or TDZ
The hockey-puck THZ fits inside a 30-35mm connec-
tion head (such as the LH1) using captive mounting
screws. The DIN THZ can be mounted on standard
DIN mounting rails. The dual-compartment [DH] THZ
installs into the [DH] enclosure and can be mounted
to a wall or 2-inch pipe. The hockey-puck TDZ can
be mounted with rails, flanges, or in one of our larger
housings, such as the D-BOX or BH.
Making the Electrical Connections
The connections for the various inputs are shown in
Figure 10 on page 12. The figure shows a single
transmitter. If you are using multiple units, connect
them using the connections shown in Figure 13.
In multi-drop networks, the unit’s receiving device is
normally a HART-communicating control system
acting as the HART Primary Master. The control sys-
tem uses each transmitters’ individual address to
access real-time process data, sensor diagnostics,
and THZ diagnostic data. The address is also used to
locate the appropriate THZ or TDZ, to initiate configu-
ration, and to calibrate. A HART communicator, acting
as the HART Secondary Master, can be used to simul-
taneously access information from, or transmit
configuration information to the transmitter from any-
where along the HART digital link.
Make sure that the total loop resistance is at least
250
Ω
so that the 4-20mA signal containing the HART
protocol is not shorted. If loop resistance is less than
250
Ω
, add a resistor.
Recommended Ground Wiring Practices
Moore Industries recommends the following ground
wiring practices:
• Any Moore Industries product in a metal case or
housing should be grounded.
• The protective earth conductor must be
connected to a system safety earth ground before
making any other connections.
• All input signals to, and output signals from, Moore
Industries’ products should be wired using a
shielded, twisted pair technique. Shields are to be
connected to an earth or safety ground at the unit
itself.
• The maximum length of unshielded input
and/or output signal wiring should be
two inches.
CE Conformity
Installation of any Moore Industries’ products that
carry the CE certification
must adhere to the guide-
lines above in order to meet the requirements set forth
in applicable EMC directives (EN55011, EN 50082-1,
EN50082-2, etc.) Consult the factory for the most
current information on products that have been
CE certified.
Figure 13. Connecting the THZ or TDZ in Multi-Drop Configuration
+
–
+
–
+
–
HART-
Based
DCS
(Primary
Master)
HART
Communicator
(HART
Secondary
Master)
THZ
(HART
Slave)
THZ
(HART
Slave)
TDZ
(HART
Slave)
1
2
3
4
+PS –PS
THZ
SMART HART
TEMPERATURE
TRANSMITTER
+PS
-PS
1
2
3
4
TDZ
ADDR
0
602.78
D E G C
Содержание TDZ
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