Product Details

The ProSoft PLX51-HART-4O is a compact DIN-rail mounted HART output gateway, designed to connect HART-compatible output field devices such as valve positioners, I/P converters and analog control valves to EtherNet/IP, Modbus TCP and DNP3 industrial Ethernet networks. Acting as a primary HART master, it supports up to four independent HART output channels and works in point-to-point or multidrop wiring modes for process control loops. The module converts digital control commands from the upper control system into standard 4-20mA analog output signals, meanwhile reading rich HART digital data including valve feedback, stroke status, device diagnostics, alarm information and firmware version, so operators can acquire both control signal and instrument health data in one single module. It adopts 16-bit DAC with calibrated accuracy better than 0.15% at 25°C, the output current range covers 0 to 22mA, and the driving capacity supports 50 to 1170 ohm resistive loads and less than 50mH inductive loads. Each channel is equipped with electronic fuse protection and current limiting to safeguard field devices. It supports secondary HART master sharing, allowing technicians to connect handheld calibrators for online parameter adjustment without interrupting the control loop. This gateway provides flexible fail-safe configuration: users can select freeze-last-value or preset fixed fail value under PLC fault mode or communication loss condition, which is critical for safety-critical process applications. All channel parameters, HART addresses and fail-safe modes are configured via PLX50 Configuration Utility. The gateway maps HART output data to Logix tags, Modbus registers or DNP3 objects, and runs independently of the PLC scan cycle, so HART control output and data exchange will not occupy controller resources or interfere with the original control logic. It provides complete diagnostic tags for channel status, signal quality, communication timeout and device fault codes, which can be displayed on HMI or SCADA for rapid troubleshooting. A conformal coated version is optional for humid, dusty and corrosive process environments. This model is widely used in new process automation construction and legacy control loop upgrade projects in oil & gas, chemical, water treatment, power and pharmaceutical industries.

This gateway adopts compact plastic housing for standard DIN rail installation. It is equipped with one 10/100Mbps auto-MDIX shielded RJ45 Ethernet port and four terminal block HART output channels, accepts 10VDC to 28VDC wide-range DC power supply with 24VDC nominal input. LED indicators display power status, module fault, Ethernet link and HART channel activity for convenient on-site inspection. The operating temperature range is -20°C to 70°C, storage temperature ranges from -40°C to 80°C, relative humidity 5% to 95% non-condensing. It complies with IEC industrial shock, vibration and EMC standards, and has obtained UL/cUL Class 1 Div 2 and CE hazardous location certifications. It supports remote configuration, online firmware upgrade and configuration backup for long-term field maintenance.

This four-channel HART output gateway is widely applied in chemical flow control, oil and gas skid valve control, water plant regulating valve control, power plant auxiliary loop regulation and pharmaceutical batch control projects. It integrates traditional HART control valves and positioners into modern Ethernet control systems, realizing closed-loop control and remote instrument diagnosis. As a reliable HART protocol conversion spare part, the PLX51-HART-4O retains original field instrument wiring and effectively reduces the renovation cost of process control loop upgrade.