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EtherNet/IP to HART Analog (4 Chan)


Discontinued: No new product for sale. More Info
Recommended replacements: PLX51-HART-4I

Check here to learn more about our Legacy Product Replacement Plan

The HART Analog Input Gateway provides a clean way to integrate HART Analog instruments with existing controller platforms on an EtherNet/IP network. The gateway works well for field applications where it can be installed closer to HART instrument, saving on copper cable and installation costs. The gateway also saves valuable rack space for other in-chassis options. The gateways provide extremely fast channel update times (all channels updating simultaneously in 67 ms) making the HART Analog Input Gateway ideal for applications where high speeds and point-to-point connectivity are required. These gateways are available in 4 and 8 Analog input channel options.

Features and Benefits

Rockwell Automation equipment that supports EPIC:

  •  PLC5/E rev C/N, D/E, E/D
  •  SLC5/05 series A, OS503 frn4
  •  1785-ENET Series A, rev D
  •  Interchange V6.2
  •  MicroLogix 1100/1400/ANY via 1761-NET-ENI
  •  CompactLogix 1768-L43/L45 via 1768-ENBT
  •  CompactLogix 1769-L32E/L35E/ANY
  •  CompactLogix L23E
  •  RSLinx Gateway V1.7+
  •  ControlLogix 1756-ENET/ENBT/EN2T/EN2TR


ProSoft Configuration Builder (PCB) provides a quick and easy way to manage module configuration files and view module and network diagnostics. PCB is not only a powerful solution for new configuration files, but also allows you to import information from previously installed (known working) configurations to new projects. EtherNet/IP (Explicit Messaging) Compatible Devices Rockwell Automation equipment that supports EPIC:

  •  PLC5/E rev C/N, D/E, E/D
  •  SLC5/05 series A, OS503 frn4
  •  1785-ENET Series A, rev D
  •  Interchange V6.2
  •  MicroLogix 1100/1400/ANY via 1761-NET-ENI
  •  CompactLogix 1768-L43/L45 via 1768-ENBT
  •  CompactLogix 1769-L32E/L35E/ANY
  •  CompactLogix L23E
  •  RSLinx Gateway V1.7+
  •  ControlLogix 1756-ENET/ENBT/EN2T/EN2TR


Internal Database

The ProLinx module contains an internal database that consists of areas for application data, status information, and configuration information.

The internal database is shared between all ports on the module and is used as a conduit to pass information from a device on one network to one or more devices on another network.

Application Data Area

The data area is used to store and retrieve data by the protocol drivers and for data exchange between protocols. The database is used as a source for write commands to remote devices and holds data collected from the remote devices. Commands defined in the configuration file (stored in the configuration data area) control how the data is to be handled in the database.

Status Data Area

This area is used to store error codes, counters, and port status information for each port.

Configuration Data Area

This area contains module configuration information such as port configuration, network information, and command configuration. This configuration file is downloaded to, or uploaded from, this area.




Power Supply Input

24 VDC nominal
18 to 32 VDC allowed
Positive, Negative, GND Terminals
2.5 mm screwdriver blade

Current Load

1-4 ch: 190 mA max @ 32 VDC max
5-8 ch: 250 mA max @ 32 VDC max

Operating Temperature

-4° F to 122° F (-20° C to 50° C)

Storage Temperature

-40° F to 185° F (-40° C to 85° C)

Relative Humidity

5% to 95% (without condensation)


 5.20 in H x 2.07 in W x 4.52 in D
 (13.2 cm x 5.25 cm x 11.48 cm)
 5.20 in H x 2.73 in W x 4.52 in D
 (13.2 cm x 6.934 cm x 11.48 cm)

LED Indicators

Power and Module Status
Application Status
HART Channel Activity (Green)

Configuration Serial Port

DB-9M RS-232 only
No hardware handshaking

HART Interface

Four (5x08) or eight (5x28) HART Point-to-Point Analog Input channels
Screw terminals for each channel

Electrical Isolation

1500 V RMS at 50 Hz to 60 Hz for 60 s, applied as specified in section 5.3.2 of IEC 60950: 1991

Common Mode Rejection

105db @ DC

Over current

± 40 mA continuous, maximum

Overvoltage Protection

All HART Inputs:
 90 V, 3-electrode gas discharge tube surge arrestor
 30 V MOV for voltage protection
 300 mA poly switch-resettable fuse for over current protection


0.05% of reading @ 25°C for signals between 4 mA to 20 mA

Built-in 24 VDC loop output power

1 Internal 24 VDC power supply for each 4 channels.
Screw terminals for Isolated 24 VDC loop power may be used to provide HART loop power.

Shipped with Each Unit

Mini-DIN to DB-9M serial cables
4 ft RS-232 configuration cable
2.5 mm screwdriver
RS232-to-RS422/RS485 Screw Terminal Adapter(s) (Serial Gateways Only)
CD (docs and Configuration utility)
HART Terminal Block connector


CE, cCSAus (Class I, Div 2, Groups ABCD), and ATEX (pending)


DFNT HART Analog Datasheet 128.91 kB Last Modified 11/07/2013
DFNT Protocol Manual 2.03 MB Last Modified 07/24/2013
HART Analog Protocol Manual 663.68 kB Last Modified 02/16/2012
PLX EDS File 333.95 kB Last Modified 05/10/2010
Technical Note - Migrating from 5207/52x8-DFNT-HART to PLX51-HART-4I 370.58 kB Last Modified 06/20/2019
ProSoft Configuration Builder (PCB)


DFNT Protocol Specification

The EtherNet/IP protocol driver supports the Explicit Messaging implementation of the protocol. User-configurable as both a Client and a Server, the EtherNet/IP port is a very powerful data transfer tool.

Protocol Specifications

The EtherNet/IP protocol is one of the primary connectivity tools to the different Rockwell Automation platforms. The Explicit Messaging aspect of the protocol (only) has been implemented in the ProLinx units to provide the data transfer link between the ProLinx units and the Rockwell Automation hardware.

General Protocol Information


Explicit Messaging supported


125 word read and write data lengths
Floating point data supported

EtherNet/IP Server Specifications

In Server mode, the module accepts commands from one or more clients to read/write data stored in the module's internal registers.

EtherNet/IP Server Specifications


Five independent TCP server sockets permit remote clients to interact with all data contained in the module.

Data File

Data Table File Start - Fixed at N10
Data Table File Size - 100 or 1000 words

CIP Services Supported

0x4C - CIP Data Table Read
0x4D - CIP Data Table Write

EtherNet/IP Client Specifications

In Client mode, the module controls the read/write data transfer between the gateway and other EtherNet/IP devices. Data transfer can be initiated and executed without any ladder programming being required in the Rockwell Automation hardware.

EtherNet/IP Client Specifications


One client

Command List

Support for 100 commands, each configurable for command, IP address, register to/from addressing and word/bit count.

Polling of command list

User configurable polling of commands, including disabled, continuous and on change of data (write only).

EtherNet/IP (Explicit Messaging) Compatible Devices

List of Rockwell Automation material that support EPIC:

  • PLC5/E rev C/N, D/E, E/D
  • SLC5/05 series A, OS503 frn4
  • 1785-ENET Series A, rev D
  • Interchange V6.2
  • MicroLogix 1100/1400/ANY via 1761-NET-ENI
  • CompactLogix 1768-L43/L45 via 1768-ENBT
  • CompactLogix 1769-L32E/L35E/ANY via 1761-NET-ENI
  • RSLinx Gateway V1.7+
  • ControlLogix 1756-ENET/ENBT/EN2T

HART Analog Protocol Specification

The HART Analog protocol driver works as a single current loop, point-to-point Master on four channels (all channels set up as channel 0). Each channel is individually configurable.

Protocol Specifications

The auto-poll mode allows the module to automatically collect data from each HART instrument on the channel and store the data in the module's database without the use of user commands. The module automatically generates HART commands 0, 3, 13, 14 and 15.

General Parameters

Communication parameters

Number of HART Preambles: 2 to 50
Enable Handheld: Y or N
Primary Master: Y or N

Configurable Parameters per Channel

Auto-Poll Enable, Short / Long Address Retries, Retries After Error
Poll Time After Error, Number of Commands, Slave List Error Pointer

HART Driver

Command List

Up to 100 fully configurable commands per channel

Polling of command list

User configurable polling of commands, including disabled, continuous, on change of data (write only) and dynamically user or automatic enabled.

Isolated HART Analog Input Specifications

Input Range

Current: 4 to 20mA with HART



Input Filter

First Order Sync: 10 Hz

Current Input Resistance

247.6 ohms +/- 1%

Open circuit detection time

1/2 second maximum

Over current

+/-40mA continuous, maximum

Common Mode Noise Rejection


Calibrated Accuracy @ 25°C

4 to 20 mA: 0.05% of reading

Input Isolation Voltage

2500 V RMS per UL 1577, transformer isolated

24V DC Isolation Voltage

1500 VDC

HART® is a registered trademark of the HART Communication Foundation


Ex Certificate (ATEX Directive) 114.27 kB Last Modified 03/13/2019
CB Safety 35.78 kB Last Modified 08/27/2012
Declaration of Conformity (RoHS/CE) 301.03 kB Last Modified 03/04/2018
Country Approval - Russia - EAC Declaration (Wired) 1.92 MB Last Modified 01/07/2020
Country Approval - Russia - EAC Declaration (Wired) 1.92 MB Last Modified 01/07/2020
UL/cUL; Class 1, Div 2 1.08 MB Last Modified 03/31/2020
UL/cUL; Class 1, Div 2 (Canada) 1.10 MB Last Modified 07/02/2013