Emerson FB3000 User Manual

FB3000 RTU Instruction Manual
D301851X012
November 2023
60 I/O Configuration and Wiring
3.2 HART
®
Input/Output Channels (3HRT04/3HRTSG4/HRT04)
The FB3000 RTU supports a 4-Channel HART
®
(Highway Addressable Remote Transducer)
module. This allows the FB3000 to communicate with external HART devices such as
transmitters.
Insert the 3HRT04 module in any base chassis slot except slot 1 and insert its
corresponding 3HTSG4 module below it. The 3HRT04/3HTSG4 modules cannot be used in
an extension chassis.
Note
The 3HRT04 module requires a chassis of Revision H or newer.
You can configure a channel for point-to-point operation in which case it communicates
with a single HART device. Alternatively, you can configure a channel for multi-drop
operation in which it communicates with up to five (5) HART devices in parallel.
Table 3-7. HART Characteristics
Type
Number
Supported
Characteristics
HART channel
1 to 4

An individual HART channel can be configured
in FBxConnect as either an input or an output,
but not both.

A HART input supports either point-to-point or
multi-drop mode
 A HART output supports only point-to-point
mode; in multi-drop mode, there is no analog
signal output available.
You can wire HART channels for different modes of operation:
3.2.1 Point-to-Point Mode
In Point-to-Point mode, the HART link allows both a 4-20mA analog current mode signal
as well as the modulated HART digital signal riding on top of it. Depending upon the HART
device connected, you can configure the channel as an AI (which means the 250-ohm
resistor is enabled) or an AO (which means the 250-ohm resistor is disabled).

Emerson FB3000 Specifications

General

Brand	Emerson
Model	FB3000
Category	Touch terminals
Language	English