December 2015
Quick Start Installation Guide
17
SET THE JUMPERS FOR HART/DE
Setting Failsafe Direction and Write Protect Jumpers
The SmartLine Multivariable Transmitter (DE or HART) provides two
jumpers to set the desired failsafe action and write protect option.
See
Figure 11.
The top jumper on the electronics module sets the failsafe direction. The
default setting is up-scale failsafe.
Upscale drives the loop to a value greater than 21mA while down scale
drives the loop to a value less than 3.8mA.
You can change the failsafe direction by moving the failsafe jumper (top
jumper) to the desired position (UP or DOWN).
The bottom jumper sets the write protect.
The default setting is OFF (Un-protected).
When set to the ON (Protected) position, changed configuration
parameters cannot be written to the transmitter.
When set to the OFF (Un-protected) position, changed configuration
parameters can be written to the transmitter.
ATTENTION
: Electrostatic Discharge (ESD) hazards. Observe
precautions for handling electrostatic sensitive devices
Step
Action
1
Turn OFF Transmitter power.
2
Loosen the end-cap lock, and unscrew the end cap from the
electronics side of the transmitter housing.
3
If applicable, carefully depress the tabs on the sides of the
display module and pull it off.
If necessary, move the interface connector from the
communication module to the display module to provide the
preferred orientation of the display module in the window.
4
Set the failsafe jumper (top jumper) to the desired action (UP or
DOWN). And the write protect jumper (Bottom jumper) to the
desired behavior (Protected or Unprotected) See
Error!
Reference source not found.
for jumper positioning.
5
Screw on the end cap and tighten the end-cap lock.
6
Turn ON Transmitter power.
