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Reference Manual
00809-0100-4708, Rev AD
September 2012
Rosemount 708
1-4
Field Communicator Connections
The Power Module needs to be installed in the device for the Field
Communicator to interface with the 708. This transmitter uses the Green
Power Module; please order model number 701PGNKF. Field communication
with this device requires a HART-based Field Communicator using the correct
708 DD. Field communicator connections are located on the power module.
The Power Module is keyed and can only be inserted in one orientation. Refer
to Figure 1-3 for instructions on connecting the Field Communicator to the
708.
Figure 1-3. Connection Diagram
Mechanical Location
When choosing an installation location and position, take into account access
to the power module compartment for easy power module replacement.
Electronics cover
The electronics cover is sealed and cannot be removed. Do not attempt to
unscrew the cover.
Electrical Power Module
The Rosemount 708 Wireless Acoustic Transmitter is self-powered. The
power module contains one “D” size primary lithium/thionyl chloride battery.
Each battery contains approximately 5.0 grams of lithium. Under normal
conditions, the battery materials are self-contained and are not reactive as
long as the battery and the power module are maintained. Care should be
taken to prevent thermal, electrical, or mechanical damage. Contacts should
be protected to prevent premature discharge.
Use caution when handling the power module, it may be damaged if dropped
from heights in excess of 6.10 m (20 ft).
Environmental Verify that the operating atmosphere of the transmitter is consistent with the
appropriate hazardous locations certifications.
Temperature Effects
The transmitter will operate within specifications for ambient temperatures
between -40 and 85 °C (-40 and 185 °F).