Emerson Process Management 2051 manual JumpersSecurity, Rosemount, Reference Manual

Rosemount 2051

Reference Manual

00809-0200-4101, Rev AA July 2008

NOTE

The transient protection terminal block does not provide transient protection unless the transmitter case is properly grounded. Use the guidelines to ground the transmitter case. Refer to page 2-25.

Do not run the transient protection ground wire with signal wiring as the ground wire may carry excessive current if a lightning strike occurs.

JumpersSecurity

After you configure the transmitter, you may want to protect the configuration data from unwarranted changes. Each transmitter is equipped with a security jumper that can be positioned “ON” to prevent the accidental or deliberate change of configuration data. The jumper is located on the front side of the electronics module and is labeled SECURITY (see Figure 2-15).

If the transmitter write protection jumper is in the “ON” position, the transmitter will not accept any “writes” to its memory. Configuration changes, such as digital trim and reranging, cannot take place when the transmitter security is on.

NOTE

If the security jumper is not installed, the transmitter will continue to operate in the security OFF configuration.

Configuring Transmitter Security Jumper Procedure

To reposition the jumper, follow the procedure described below.

1.Do not remove the transmitter covers in explosive atmospheres when the circuit is live. If the transmitter is live, set the loop to manual and remove power.

2. Remove the housing cover opposite the field terminal side. Do not remove the transmitter covers in explosive atmospheres when the circuit is live.

3.Reposition the jumpers as desired. Refer to Figure 2-15.

4. Reattach the transmitter cover. Always ensure a proper seal by installing the electronics housing covers so that metal contacts metal to meet explosion-proof requirements.

Simulate

The simulate jumper is used in conjunction with the Analog Input (AI) function block. This switch is used to simulate the measurement. To enable the simulate feature, insert the jumper across “ENABLE” (see Figure 2-15) while the transmitter is powered.

NOTE

When power is cycled to the transmitter, simulate is automatically disabled regardless of the position of the jumper. This prevents the transmitter from being accidentally left in simulate mode. Therefore, to enable the simulate feature, the jumper must be inserted after power is applied to the transmitter.

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