Appendix C. Hart Communication; Wiring The Xmt1000 To The Hart Communicator; Hart Write Mode Switch - GE PanaFlow XMT1000 User Manual

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 Figure 16 below. The HART
communicator is connected in parallel with that load.
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 Figure 17 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.
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.
PanaFlow™ XMT1000 User's Manual
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Figure 16: Wiring Diagram for HART Communication
Figure 17: HART Circuit Write Mode Switch
250 ohm
Hart
Communicator
Write
Read
Enabled
Only
Appendix C. HART Communication
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