Write protection Sym‐
bol
ID Read measured values on
the display
Read parameters on the
display
Change parameters
via the device with dis‐
play
Jumper set L Yes No No
User PIN
1)
enabled LP Yes Yes Yes, after input of the
user PIN
Button lock enabled LL Yes No No
1)
The user PIN is factory set to 2457 in the device. When delivered, write protection is disabled
using the user PIN.
Devices with functional safety
To enable functional safety, you first enable the user PIN:
See also
Setting the jumper (Page 79)
User PIN [27] (Page 134)
Button lock [23] (Page 130)
7.4.1 Setting the jumper
Introduction
The jumper is used for enabling write protection.
Procedure
1. Switch off the power supply.
2. Remove the front cover connector of the device.
Operating
7.4 Locking the device
SITRANS P320/P420 (mA/HART)
Operating Instructions, 06/2018, A5E44852162-AA 79
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