Data Sheet

HF340 Filter
D102798X012
Product Bulletin
62.1:HF340
August 2012
3
Table 2. Control System Installation Requirements for HART Communicating FIELDVUE Digital Valve Controllers
Control System
(1)
Installation Requirement
Baileyt Infi 90t Filter required
Fischer-Porter DCI 40PC2000C Filter required
Honeywellt TDC2000 Filter required
Honeywell TDC3000
Multi-function controller Filter required
High-Density Process Manager (HPM) controller No filter required
FOXBOROt I/A (1988) No filter required
Mooret 352 No filter required
Valmett (output configured for straight through, not for 250 ohms) No filter required
Rosemountt RS-3 Multiport with HART I/O No filter required
Fisher-Rosemount DeltaVt (AO and HART I/O) No filter required
Fisher-Rosemount PROVOXt Configurable, Computing, and Interactive (IAC) Controllers Filter required
Fisher-Rosemount PROVOX MUX (parallel) I/O No filter required
Fisher-Rosemount PROVOX
Control (serial) I/O
for AO Filter required
for HART I/O No filter required
Fisher-Rosemount TL108 with 24 or 45 volt DC power No filter required
Fisher-Rosemount DPR900 Filter required
Fisher-Rosemount ROC 364 No filter required
Transmationt 1028 mA Calibrator No filter required
NOTE: The information presented in this table reflects the feedback of users of the HF340 filter. Your experiences and usage may vary depending on your control system, conditions, and other
factors.
1. For control systems not listed, a filter is recommended, if the voltage available at the instrument is adequate. See appropriate instrument instruction manual for procedures for determining
voltage available. Filtering ensures proper communication and simplifies connecting a HART communicator or HART interchange multiplexer.
Figure 1. Effect of Control System Impedance on the
HART Signal Amplitude
AI
AO
AO + filter
250 ohms
10 ohms
FILTER
A6872
Installation
Figure 2 shows a typical HART filter installation. The
filter is normally installed near the field wiring
terminals of the control system I/O. The HF340 filter
mounts on DIN rails. HART communication is only
possible between the filter and the field instrument
and at the COMM terminals, but not on the control
system side of the filter. The filter is not approved for
use in hazardous areas. However, it can be used with
instruments in hazardous areas by following the
appropriate wiring and installation guidelines.
Ordering Information
When ordering, specify the filter type number HF340
or the optional HF341 communications tap.