PrimaX
GB
29
4.7 Optional HART Module and Relay
HART
Introduction
"HART" is an acronym for Highway Addressable Remote Transducer. The
HART Protocol makes use of the Bell 202 Frequency Shift Keying [FSK] standard
to superimpose digital communication signals at a low level on top of the 4 - 20 mA.
The HART Protocol provides two simultaneous communication channels:
the 4 - 20 mA analog signal and a digital signal. The 4 - 20 mA signal communicates
the primary measured value [in the case of a field instrument] using the 4 - 20 mA
current loop. Additional device information is communicated using a digital signal
that is superimposed on the analog signal.
PrimaX is registered with the HART foundation and can be accessed at
http://www.hartcomm.org/
The device is available with an optional HART module or a module with HART and
Relays for alarm and failure. It uses the HART Protocol Revision 7 and can only
communicate with HART Masters who support revision 7 or higher.
Electrical Installation
Fig. 10 HART ports
For wiring diagrams chapter 10.6.
The following HART functions are also available:
ZERO SPAN Calibration / Oxygen Calibration; ZERO Calibration; Sen-
sor Exchange; LCD/LED Test; Loop Test; Range setup; Reset alarm;
Readout all measured data and information.
1 Optional HART port
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