HART 4-IN
HART 4-OUT
Note: This product is now sold exclusively through ProSoft Technology
The HART 4 module can convert up to four analog devices into: EtherNet/IP, Modbus-TCP, or DNP3 TCP/UDP. This includes input and output HART and non-HART analog devices.
- HART to EtherNet/IP
- Analog Input or Output (4 Channels)
- Supports
- DNP3 with Secure Authentication
- Modbus-TCP
- Multidrop
- Burst Mode
- HART Data & Diagnostics
- Onboard 1000 point trend
- DTM Available

Overview
The HART 4 module can convert up to four analog devices int either EtherNet/IP, Modbus-TCP, or DNP3 TCP/UDP protocols. This includes 4 to 20 mA input and output devices with or without HART communications as well as 0 to 20 ma devices without HART.
The Hart 4 is available in Input or Output variations:
- A-HRT-4I for HART input devices like process instruments.
- A-HRT-4O for HART output devices like valve positioners.
The conversion to EtherNet/IP enables a HART device to be added directly into a Rockwell Automation Logix IO tree. The Modbus-TCP option enables a HART field device to be viewed as a Modbus Slave. The DNP3 option converts a HART field device into a DNP3 Outstation. The DNP3 option, also supports Secure Authentication, ensuring secure communications across the Ethernet network.
In addition, a rich collection of process and diagnostic information is provided directly into Logix, without the use of any explicit messaging. HART commands can also be relayed to the device using an EtherNet/IP message relay object. A DTM (Device Type Manager) is available further simplifying device configuration and management using an FDT frame. A built-in webserver provides detailed diagnostics of system configuration and operation as well as field device specific diagnostics.
Specification
Electrical
Specification | Rating |
Power requirements |
Input: 10 – 28V DC 35 mA @ 24 VDC - With no field device attached. 130 mA @ 24 VDC - With 4 field devices at 22mA. 64 mA @ 12 VDC - With no field device attached. 160 mA @ 12 VDC - With 4 field devices at 22mA. |
Power consumption |
0.9 W - With no field device attached. 3.1 W - With 4 field devices at 22mA. 4.3 W - With input channels shorted (HART 4In)
|
Connector (Power) | 3-way terminal |
Connector (Analog) | 2-way terminal |
Conductors | 24 - 18 AWG |
Enclosure rating | IP20, NEMA/UL Open Type |
Earth connection | Yes, terminal based |
Temperature | -20 – 70 °C |
Emissions | IEC61000-6-4 |
ESD Immunity | EN 61000-4-2 |
Radiated RF Immunity | IEC 61000-4-3 |
EFT/B Immunity | EFT: IEC 61000-4-4 |
Surge Immunity | Surge: IEC 61000-4-5 |
Conducted RF Immunity | IEC 61000-4-6 |
Ethernet
Specification | Rating |
Connector | RJ45 |
Conductors | CAT5 STP/UTP |
ARP connections | Max 20 |
TCP connections | Max 20 |
CIP connections | Max 10 |
Communication rate | 10/100Mbps |
Duplex mode | Full/Half |
Auto-MDIX support | Yes |
Analog Input Channel (HART 4In)
Specification | Rating |
Number of channels | 4 |
ADC resolution | 12 bit |
Input impedance | 247.5Ohm |
Accuracy (calibrated @ 25 degC) | < 0.15% |
Accuracy (uncalibrated) | < 0.30% |
Rangetd> | 0 - 22mA |
Current Limit | 34mA |
Analog Output Channel (HART 4Out)
Specification | Rating |
Number of channels | 4 |
DAC resolution | 16 bit |
Drive | 50 - 1170 Ohm Resistive < 50 mH Inductive |
Accuracy (calibrated @ 25 degC) | < 0.15% |
Accuracy (uncalibrated) | < 0.30% |
Rangetd> | 0 - 22mA |
Certifications
Specification | Rating |
CE Mark | ![]() |
RCM | ![]() |
ODVA Conformance | ![]() |
RoHS2 Compliant | ![]() |
Dimensions
Downloads
Documents





Examples


EDS Files


Firmware
DTM
