Security Switch; Hart Lock - Emerson Rosemount 2051 Reference Manual

Reference Manual
00809-0100-4107, Rev CA
Figure 4-2. 4—20 mA Electronics Board
A. Alarm
B. Security
Note
1-5 Vdc Alarm and Security switches are located in the same location as 4-20 mA output boards.
4.4.1 Security
The security switch is used to prevent changes to the transmitter configuration data. If the security
switch is set to the locked location (
local configuration buttons will be rejected by the transmitter and the transmitter configuration data will
not be modified. See figure above for the location of the security switch. Follow the steps below to
enable the security switch.
1.
2.
3.
4.
4.4.2

HART Lock

The HART Lock prevents changes to the transmitter configuration from all sources; all changes requested
via HART, LOI, and local configuration buttons will be rejected. The HART Lock can only be set via HART
communication, and is only available in HART Revision 7 mode. The HART Lock can be enabled or
disabled with a Field Communicator or AMS Device Manager.
Electrical Installation
without LCD meter
switch
Set loop to manual and remove power.
Remove transmitter housing cover.
Use a small screwdriver to slide the switch to the lock (
Replace transmitter housing cover; cover must be fully engaged to comply with explosion proof
requirements.
with LCD display
A
B
), any transmitter configuration requests sent via HART, LOI, or
Electrical Installation
) position.
July 2017
51