Table of Contents
Advertisement
Operation and Maintenance
July 2018
Note
Do not apply high voltage (e.g., ac line voltage) to the transmitter terminals. Abnormally high voltage
can damage the unit. (Sensor and transmitter power terminals are rated to 42.4 Vdc. A constant 42.4
volts across the sensor terminals may damage the unit.)
For multichannel HART
RTD and thermocouple types. Refer to
The sensor wiring diagram is located on the device's top label below the terminal screws. See
and
Figure 4-2
Transmitter.
Figure 4-1. Wiring Diagram Location
Rosemount 644 Head Mount Transmitter
4.3.1
Sensor connections
The Rosemount 644 Transmitter is compatible with a number of RTD and thermocouple sensor types.
Figure 4-2
proper sensor connection, anchor the sensor lead wires into the appropriate captive terminals and
tighten the screws.
56
®
installations, see above. The transmitters will accept inputs from a variety of
for where to find and how to correctly wire all sensor types to the Rosemount 644
shows the correct input connections to the sensor terminals on the transmitter. To ensure a
Figure 2-6 on page 14
when making sensor connections.
Rosemount 644 Field Mount Transmitter
Reference Manual
00809-0200-4728, Rev SA
Figure 4-1
Operation and Maintenance
Advertisement
Table of Contents
