Page 206 ST 700 SmartLine Pressure Transmitters User’s Manual Revision 13
13.4.1 Procedure to Establish Failsafe Operation
The failsafe direction display accessible via the toolkit shows only the state of the jumper
as it correlates to analog transmitter operation.
The integrated circuits in the transmitter PWA are vunerable to damage by stray static
discharges when removed from the electronics housing. Minimize the possibility of static
discharge damage when handling the PWA as follows:
Do not touch terminals, connectors, component leads, or circuits when handling the PWA.
When removing or installing the PWA, handle it by its edges or bracket section only. If you
need to touch the PWA circuits, be sure you are grounded by staying in contact with a
grounded surface or by wearing a grounded wrist strap.
When the PWA is removed from the transmitter, put it in an electrically conductive bag, or
wrap it in aluminum foil to protect it.
The following procedure outlines the steps for positioning the write protect and failsafe jumpers on
the electronics module. See Figure 59 for the locations of the failsafe and write protect jumpers.
Figure 59 – ST 700 Basic Transmitter - Locating the Failsafe and Write
Protect Jumpers
Table 38 – ST 700 Basic Transmitter - HART Failsafe and Write Protect
Jumpers
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