Table 3-7: Configuration protect switch settings
CPU Module switch Configuration protected Configuration unprotected
WRITE PROT. ON (default) OFF
A complete list of write-protected parameters is in Engineering Drawings.
3.6.7 External power source connection and fuse
Located inside the Transmitter Electronics Enclosure is a connector for a user-
provided external power source, a 2 Ampere fuse and a 24 V loop power
connection for ultrasonic meter analog outputs, generator temperature or
pressure transmitter devices. The current is limited to 88 mA.
Figure 3-8: CPU Module power source connections
A. Power In connector (main power)
B. 24 V Loop power
C. 2 Ampere fuse (used for the main power input)
3.7 Security seal installation
Security seals protect the integrity of the meter metrology and prevent tampering
with transducer assemblies. The following sections detail how to properly seal the
Rosemount 3814 Liquid Ultrasonic Flow Meter after commissioning. The security
seal wires are commercially available.
Be sure to set the WRITE PROT. switch on the CPU Module to the ON position
prior to sealing the enclosure.
3.7.1
Sealing the Transmitter Electronics Enclosure
Use the following instructions to install the security seal wires on the Transmitter
Electronics Enclosures.
Electrical Installation Installation manual
January 2023 00825-0100-3814
58 Emerson.com/Rosemount
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