PanaFlow™ XMT1000 User’s Manual
53
Appendix C. HART Communication
Appendix C. HART Communication
C.1 Wiring the XMT1000 to the HART Communicator
When connecting a HART communicator to the wiring terminals on the PanaFlow XMT1000 electronics terminal
board, the circuit must be terminated in an appropriate resistive load, as shown in
below. The HART
communicator is connected in parallel with that load.
Figure 16: Wiring Diagram for HART Communication
C.2 HART Write Mode Switch
The XMT1000 HART circuit includes a slide switch which can be used to disable write access to the instrument via
HART. This slide switch (pictured in
below) is designed to lock out HART configuration access for those
customers who require this extra level of security. With the
Write Mode
switch pushed to the right, the HART circuit is
in
write enabled
mode.
Figure 17: HART Circuit Write Mode Switch
Note:
The following sections of this Appendix provide menu maps for programming the XMT1000 via HART
communication. To make programming changes through HART, the HART circuit must be set to
Write Enabled
mode. Attempting to write to a device in
Read Only
mode will cause the device to indicate that the meter is in
Write-Protect
mode.
Hart
Communicator
250 ohm
+
-
Write
Enabled
Read
Only
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