Emerson Daniel 3818, Installation Manual

Page: 46 / 98

Important
Daniel recommends running conduit and field wiring to each of the co-located Transmitter
Electronics Enclosures and wiring each of the meters.
3.5.1 CPU Module labeling and LED indicators
The meter’s metrology mode and the status of the data transfer from the Acquisition
Module to the CPU Module is indicated via light-emitting diode (LED) status indicators.
The Write PROT. switch prevents overwriting the meter’s configuration.
Figure 3-3: CPU Module labeling and LED indicators
A. Acquisition/Measurement mode
B. Power
C. RX (RS-485/RS-232) - receiving data
D. LED 4 - not used
E. LED 5 - not used
F. TX (RS-485/RS-232) - transmitting data
G. Link (Eth1 Link) - user Ethernet connection
Table 3-2: CPU Module labeling and LED functions
CPU Module labeling and LED
functions Function Switch position indicator or
LED
WRITE PROT. • Write-protect mode - with
switch in the ON position
(default setting) protects
configuration and firmware
overwrites.
• To write configuration
changes or download
firmware to the meter
change the switch to the
OFF position
Switch position
• ON - (default setting)
enables writeprotection of
the configuration and
firmware
• OFF - enables writing
configuration changes or
downloading firmware
Electrical Installation Installation manual
May 2019 3-9000-771
46 3818 LNG Liquid Ultrasonic Meter