The 51304730-325, also marked as 51304730325, is a high-level analog input field terminal assembly designed for Honeywell TDC 3000, TPS, UCN and Experion PKS DCS systems. It features galvanic isolation, signal conditioning and 24 VDC power supply for field instruments. This model is not applied with conformal coating and is suitable for installation in clean industrial environments. It acts as the connection terminal between field high-level signal transmitters and corresponding analog input modules.

51304730-325 is the official part number of Honeywell. The code 5130 represents the TDC 3000 and UCN DCS hardware series. The segment 4730 stands for the circuit design of high-level analog input field terminal assembly. The suffix 325 refers to the specific hardware revision, 16-channel configuration and non-coated version with crimp terminals. Its common alias is MU-GAIH84, and it is also known as isolated high-level analog input FTA and 4-20mA signal terminal board.

This device is configured with 16 differential analog input channels. It supports 4-20mA current signals from two-wire and self-powered transmitters, as well as 0-5 V, 0-10 V, ±5 V and ±10 V voltage signals. It provides 1500 VAC galvanic isolation between field side and system side. It adopts crimp type screw terminals with gold-plated contacts. The built-in loop power outputs 24 VDC nominal voltage, with 28 VDC open-circuit voltage and maximum 93 mA short-circuit current. The operating temperature ranges from minus 20 degrees Celsius to plus 60 degrees Celsius, and the storage temperature ranges from minus 40 degrees Celsius to plus 70 degrees Celsius. The applicable relative humidity is 5% to 95 percent without condensation. The circuit board has no conformal coating. The product has passed CE, UL, CSA and RoHS certifications. It adopts Size B structure with a length of 307 millimeters, and the overall weight is approximately 2.2 kilograms.

It connects to supporting high-level analog input modules such as MC-PAIH03 and 51304754-150 through a dedicated ribbon cable. The field side is equipped with 16 differential terminal pairs for accessing 4-20mA and voltage signals, and it also provides 24 VDC auxiliary power terminals. Complete electrical isolation is realized between field wiring and DCS backplane to prevent transient voltage and ground potential difference from damaging system equipment. This is a passive terminal assembly without independent communication protocol. All data processing and fault diagnosis functions are completed by the matched analog input module and DCS network.

It realizes signal termination for 16 channels of high-level analog signals collected from field transmitters. The 1500 VAC isolation design effectively eliminates ground loops and external electromagnetic interference to protect DCS main equipment. It supplies stable 24 VDC power for two-wire field transmitters. The internal circuit carries out signal filtering and surge protection to guarantee stable signal transmission. The gold-plated crimp terminals maintain reliable connection under long-term vibration environment and reduce signal loss. It is fully compatible with the supporting analog input modules of TDC 3000, TPS, UCN and Experion PKS systems for quick installation and replacement.

This product is applicable to Honeywell TDC 3000, TPS, UCN and Experion PKS distributed control systems. It is widely used in oil and gas, chemical engineering, petrochemical, power generation, pharmaceutical, papermaking and other process industries. It is mainly used to connect pressure, flow, liquid level and temperature transmitters with 4-20mA or standard voltage output, as well as various voltage type field sensors. It is installed in DCS control room cabinets and on-site control panels, and is recommended for clean, dry and non-corrosive working environments.

Install the terminal assembly into the standard DCS cabinet and reserve enough space for wiring and heat dissipation. Connect the ribbon cable to the matched analog input module, and confirm that the connectors are fully inserted and fixed. Connect field instrument cables to corresponding terminals in accordance with polarity requirements, and fasten the terminals with standard torque to avoid loose contact. After wiring is completed, power on the DCS system, check all working statuses to ensure no fault alarms, and verify the accuracy of field signal reading through the system operation interface.

Keep the operating environment clean, dry and well ventilated. Regularly inspect the tightness of terminals and the integrity of connecting cables every quarter, and replace damaged cables in a timely manner. Use dry soft cloth to wipe surface dust, and never use liquid detergent or abrasive tools to clean the circuit board and terminals. Store spare products in anti-static bags and place them in cool and dry areas. Take anti-static measures during handling to prevent static damage to internal components. Do not disassemble the device without authorization.