Emerson 3812 User Manual
Daniel 3812 Liquid Ultrasonic Flow Meter Installation Manual
Section 3: Electrical installation
3-9000-765 Rev H
May 2015
Configuration protect switch settings
61
3.6.6
Configuration protect switch settings
The meter’s configuration parameters and firmware can be protected against changes via CPU
Module Write PROT. switch as follows:
Module Write PROT. switch as follows:
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 24V loop power connection for ultrasonic meter analog
outputs, generator transmitter or pressure transmitter devices. The current is limited to 88mA.
power source, a 2 Ampere fuse and a 24V loop power connection for ultrasonic meter analog
outputs, generator transmitter or pressure transmitter devices. The current is limited to 88mA.
Figure 3-7 CPU Module power source connections
Table 3-7 Configuration protect switch settings
CPU Module switch
Configuration protected
Configuration unprotected
WRITE PROT.
ON (default)
OFF
A.
B.
A. Power In connector (main power)
B. 24V LOOP POWER
C. 2 Ampere fuse (used for the main power input)
B. 24V LOOP POWER
C. 2 Ampere fuse (used for the main power input)
C.