Table 8 - Hart Failsafe And Write Protect Jumpers - Honeywell STT750 SmartLine User Manual

1. Turn OFF Transmitter power (Power removal is only required in accordance with
area safety approvals. Power removal is only required in Class 1 Div 1 Explosion
proof and Class 1 Div 2 environments).
2. Loosen the end cap lock, and unscrew the end cap from the electronics side of the
Transmitter housing.
3. If equipped with a Display module, carefully depress the two tabs on the sides of the
Display Module, and pull it off.
4. If necessary, unplug the interface connector from the Communication module. Do not
discard the connector.
5. Set the Failsafe Jumper (top jumper) to the desired position (UP or DOWN). See
Table 8
6. If applicable, re-install the Display module as follows:



NOTE: Installing a Display Module into a powered transmitter may cause a temporary upset
to the loop output value.
Orient the Display for proper viewing through the end cap window.
You can rotate the meter mounting orientation in 90
7. Restore transmitter power if removed.
Revision 4
Table 8 – HART Failsafe and Write Protect Jumpers
Jumper
Arrangements
Failsafe = UP (High)
Write Protect = OFF (Not Protected)
Failsafe = DOWN (Low)
Write Protect = OFF (Not Protected)
Failsafe = UP (High)
Write Protect = ON (Protected)
Failsafe = DOWN (Low)
Write Protect = On (Protected)
and Figure 16 for jumper positioning.
Orient the display as desired.
Install the Interface Connector in the Display module such that it will mate
with the socket for the display in the Communication module.
Carefully line up the display, and snap it into place. Verify that the two tabs
on the sides of the display latch.
STT750 Temperature Transmitter User's Manual
Description
o
increments.
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