Emerson 644 Dokumentacja Strona 101

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91
Reference Manual
00809-0200-4728, Rev RA
Appendix A: Specifications and Reference Data
April 2015
Specifications and Reference Data
Appendix A Specifications and Reference
Data
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 91
4–20 mA / HART specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 96
Dimensional drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 103
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 108
Specifications and reference data for 644 HART Head Mount . . . . . . . . . . . . . . . . . . . . . page 119
A.1 Specifications
A.1.1 Functional
Inputs
User-selectable; sensor terminals rated to 42.4 Vdc. See“Accuracy on page 98 for sensor
options.
Output
Single 2 wire device with 4-20 mA/HART
®
(Revision 5 or 7 Selectable), linear with temperature
or input.
Isolation
Input/output isolation tested to 620 Vrms (876.8 Vpp) at 50/60 Hz
Local display
The optional five-digit integral LCD display includes a floating or fixed decimal point. It can also
display engineering units (°F, °C, °R, K, Ω, and millivolts), mA, and percent of span. The display
can be configured to alternate between selected display options. Display settings are
preconfigured at the factory according to the standard transmitter configuration. They can be
reconfigured in the field using HART communications.
LCD display with Local Operator Interface
An optional 14 digit, 2 line integral LCD display operates with a floating or fixed decimal point.
The LOI includes all features and functionality available in the regular display with an added
2-button configuration capability directly at the display interface. The LOI also has optional
Password Protection for secure operations. The LOI is available on the 644 HART Head Mount
and Field Mount products.
For more information on the LOI configuration options or further functionality that the LOI
offers, see
Appendix D: Local Operator Interface (LOI).
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