Emerson manual Rosemount 848L, Reference Manual, 00809-0100-4696,Rev AA September

Rosemount 848L

Reference Manual

00809-0100-4696, Rev AA September 2004

Security

After configuring the transmitter, the data can be protected from unwarranted changes. Each 848L is equipped with a security switch that can be positioned “ON” to prevent the accidental or deliberate change of configuration data.

This switch is located on the front side of the electronics module and is labeled SECURITY.

See Figure 2-5 on page 2-5 for switch location on the transmitter label. Refer to Section 3: Configuration, “SOFT WRITE LOCK and HARD WRITE LOCK” on page 3-5.

Simulate Enable

The switch labeled SIMULATE ENABLE is used in conjunction with the with the Discrete Input (DI) and Discrete Output (DO) function blocks. This switch is used to simulate input status. As a lock-out feature, the switch must transition from “OFF” to “ON” after power is applied to the transmitter. This feature prevents the transmitter from being left in simulator mode.

NOT USED

The switch labeled NOT USED is only used for product engineering and development purposes and should always remain in the “OFF” position. If the switch is turned to the “ON” position and power is applied, the 848L will not be present on the fieldbus segment.

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