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HF300 Series
Instruction Manual
Form 5715
June 2007
2
Table 1. Specifications
Product Types
Type HF340: Standard 35 mm DIN rail mounting
with filtering components.
Type HF341: Standard 35 mm DIN rail mounting
without filtering components (straight through with
capacitor blocking on COMM terminals).
Connections
Three 2-pin Cage-clamp style connectors
accept up to 12 AWG wire
Power Requirements (Type HF340 only)
Input Current: 4−20 mA DC (nominal)
Input Voltage: At 20 milliamps DC, 2 volts above
input voltage required by the field instrument (2
volt drop across filter at 20 milliamps DC)
Filter Output
Filter output is clamped at 15 volts DC. Filter load
voltage requirement must not exceed 14 volts DC
Ambient Operating Temperature
−40 to 85_C (−40 to 185_F)
Ambient Relative Humidity
5 to 95%
Electromagnetic Interference (EMI)
These units have the CE mark in accordance with
the European Electromagnetic Compatibility
(EMC) Directive. They meet the emissions
requirements of IEC 61326-1 (Edition 1.1) for
Class A equipment for use in industrial locations
and Class B equipment for use in domestic
locations. They also meet the immunity
requirements listed in table 2 below. This table is
in accordance with Annex A of IEC 61326-1 for
equipment intended for use in industrial locations.
Dimensions
75 mm (3 inches) long by 12.5 mm (0.5 inches)
wide by 60 mm (2.4 inches) deep
Approximate Weight
0.1 kg (4 oz)
Table 2. EMC Immunity Performance Criteria
Port Phenomenon Basic Standard Performance Criteria
Enclosure
Electrostatic discharge (ESD) IEC 61000-4-2 A
EM field IEC 61000-4-3 A
Rated power frequency magnetic field IEC 61000-4-8 N/A
(1)
I/O signal/control
Burst IEC 61000-4-4 A
Surge IEC 61000-4-5 A
Conducted RF IEC 61000-4-6 A
1. Not applicable; only applicable to magnetically sensitive equipment.
The filter is normally installed near the field wiring
terminals of the control system I/O. HART
communication is only possible between the filter
and the field instrument and at the filter COMM
terminals, but not on the control system side of the
filter. The filter is not designed or intended for use in
the process environment. Neither the filter nor its
outputs are approved for hazardous areas. However,
a recommended intrinsic safety barrier can be
connected between the FIELDVUE instrument and
the filter in intrinsically safe installations. In most
cases, if an IS barrier is used, the filter will not be
needed.
Specifications
Typical specifications for the HF300 Series HART
filters are shown in table 1.
Note
Neither Emerson, Emerson Process
Management, nor any of their affiliated
entities assumes responsibility for the
selection, use, and maintenance of any
product. Responsibility for the
selection, use, and maintenance of any
product remains with the purchaser
and end-user.