Reference Manual
00809-0100-4728, Rev HA
December 2002
A-3
Models 644H and 644R
Physical Electrical Connections
HART Communicator Connections
Materials of Construction
Mounting
Model 644R attaches directly to a wall or a DIN rail. Model 644H installs in a
connection head or universal head mounted directly on a sensor assembly,
apart from a sensor assembly using a universal head, or to a DIN rail using an
optional mounting clip.
Weight
Enclosure Ratings (Model 644H)
All option codes (S1, S2, S3, S4, J5 and J6) are NEMA 4X, IP66, and IP68.
Option code J6 is CSA Enclosure Type 4X.
Performance EMC (ElectroMagnetic Compatibility) NAMUR NE 21 Standard
The Models 644H meets the requirements for NAMUR NE21 Rating.
(Hardware Rev 26 and later.)
Model Power and Sensor Terminals
644H Compression screws permanently fixed to terminal block
644R Compression screw permanently fixed to front panel
WAGO
®
spring clamp terminals are optional (option code G5)
Communication Terminals
Model 644H Clips permanently fixed to terminal block
Model 644R Clips permanently fixed to front panel
Electronics Housing and Terminal Block
Model 644H Noryl
®
glass reinforced
Model 644R Lexan
®
polycarbonate
Enclosure (Option code J5 or J6)
Housing Low-copper aluminum
Paint Polyurethane
Cover O-ring Buna-N
Code Options Weight
644H Head Mount Transmitter 96 g (3.39 oz)
M5 LCD Display 38 g (1.34 oz)
J5, J6 Universal Head, Standard Cover 577 g (20.35 oz)
J5, J6 Universal Head, Meter Cover 667 g (23.53 oz)
644R Rail Mount Transmitter 174 g (6.14 oz)
Susceptibility Parameter Influence
ESD
• 6 kV contact discharge
• 8 kV air discharge
None
Radiated • 80 – 1000 MHz at 10 V/m AM < 0.5%
Burst • 1 kV for I.O. None
Surge
• 0.5 kV line–line
• 1 kV line–ground (I.O. tool)
None
Conducted • 150 kHz to 80 MHz at 10 V < 0.5%
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