Instruction Manual

Instruction Manual
D102796X012
HF340 Filter
March 2015
3
Installation
Refer to figure 2 for typical installations. The HF340 filter mounts on a type 35 DIN rail. To install the filter, provide a
temporary means of process control, then take the loop out of service. Remove the DIN interconnect blocks from the
rail without disconnecting existing wiring. Install the filter on the the rail. Disconnect the wires from the control system
output side of the interconnect blocks and connect them to the SYS terminals on the filter, taking care to maintain
correct polarity. Disconnect the wires from the field side of the interconnect blocks and connect them to the FLD
terminals on the filter, taking care to maintain correct polarity.
Figure 2. Typical Fisher HF340 HART Filter Installation
CONTROL
SYSTEM OUTPUT
TERMINALS
HART COMMUNICATION
INTERFACE
FIELD DEVICES
FLD TERMINALS
COMM TERMINALS
SYS TERMINALS
HART COMMUNICATION NETWORK
FIELD
COMMUNICATOR
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