NRF590 Tank Side Monitor Spare Parts List and Selection Guide

NRF590 Tank Side Monitor Spare Parts Overview

The NRF590 Tank Side Monitor is a field indication instrument designed by Endress+Hauser specifically for tank level measurement, widely used in tank farm gauging systems in the petroleum, chemical, and other industries. To ensure long-term stable operation of the instrument, timely replacement of worn or faulty components is essential. This article compiles a list of commonly used spare parts for the NRF590, including order numbers, specification descriptions, and applicable models, for reference by engineering technicians and procurement personnel.

Spare parts are classified by functional module, covering housing components, circuit boards, input/output modules, display and operating modules, and accessories. All spare parts are applicable to the Tank Side Monitor NRF590 series.

Detailed Spare Parts List

Housing and Cover Components

Housing components are used to protect internal circuits and meet the requirements of different hazardous areas. The following are aluminum covers and related sealing parts:

Circuit Boards and Power Modules

Circuit boards are the core components of the instrument, providing power and signal processing functions. When selecting, pay attention to power supply voltage and certification requirements.

Digital Input/Output Modules

Digital input modules are used to acquire switching signals, and digital output modules are used to control external devices. The following are commonly used module spare parts:

Terminal Blocks and Accessories

Terminal block assemblies are used for electrical connections, bracket assemblies are used to secure internal modules, and insulating plates are used to isolate different circuit boards.

• 52012985: Terminal block assembly, including 4-pole blue terminals x4, 4-pole green terminals x3, 2-pole green terminals x2.
• 52012998: Bracket assembly, including display module bracket, I/O module bracket, electronics cover, fastening screws.
• 52012997: Insulating plate, for isolation between IS board/power board and power board/communication board.

Display and Operating Module

The display and operating module provides a human-machine interface, using a 4-line graphic LCD display with a flat cable.

• 52012984: Display and operating module, 4-line graphic LCD display, with flat cable.

Cable Glands and Blind Plugs

Cable glands and blind plugs are used for sealing and explosion protection of cable entries. Materials and specifications vary and should be selected according to site requirements.

Sealing Components and Adapters

Sealing components are used to ensure the protection rating of the housing, and adapters are used to connect service tools.

• 52013142: Sealing kit, including 2 O-rings 113.9x3.53 NBR, 1 O-ring 123.42x3.53 NBR, 1 O-ring 123.42x3.53 PTFE.
• 71007843: ToF adapter FXA291, for connecting Micropilot M, Micropilot S, Levelflex M, Prosonic M, Tank Side Monitor, Deltabar S, Cerabar S, Gammapilot M, Micropilot I to Commubox FXA291.
• 71000221: Adapter cable, for connecting service tool RS232 (52013675)/ToF adapter FXA291 (71007843) to Micropilot M, Prosonic M, Levelflex M, Cerabar S, Deltabar S.

NRF590X PC Board Selection Code Explanation

The NRF590X PC board includes a main board and a communication board, which are mutually matched and must be replaced as a set. When selecting, specify the approval type, communication protocol, Spot RTD option, and weight + measure approval. The following is an explanation of the selection codes.

Approval Type

• 6: ATEX II 2 (1) EEx d [ia] IIC T6
• A: Non-hazardous area
• B: NEPSI Ex d[ia] IIC T6
• K: TIIS EEx d [ia] IIC T6
• S: FM XP Cl.I Div.1 Gr.A-D, zone 1,2
• U: CSA XP Cl.I Div.1 Gr.A-D, zone 1,2
• Y: Special version, TSP number required

Field Communication Protocol

• 1: WM550, non-IS 4-20mA output, Whessoe protocol with dual communication
• 2: Mark/Space, without 4-20mA input + output, Varec protocol
• 3: Mark/Space, non-IS 4-20mA input + output, Varec Mark/Space protocol
• 4: Modbus, without 4-20mA input + output, EIA 485
• 5: Modbus, non-IS 4-20mA input + output, EIA 485
• 6: L&J, without 4-20mA input + output
• 7: L&J, non-IS 4-20mA input + output
• 8: V1, non-IS 4-20mA output, non-IS 4-20mA HART output, relay output
• 9: Special version, TSP number required
• E: ENRAF BPM, non-IS 4-20mA input, non-IS 4-20mA HART main output
• G: GPE, non-IS 4-20mA output

Spot RTD Option

• 0: Not selected
• 1: Intrinsically safe input
• 9: Special version, TSP number required

Weight + Measure Approval

• A: NMi type approval
• G: PTB type approval
• N: Not selected
• Y: Special version, TSP number required

Precautions for Spare Parts Selection and Replacement

When selecting spare parts, be sure to verify the instrument model, approval type, and communication protocol to ensure spare parts compatibility. When replacing circuit boards or modules, follow the operating manual and pay attention to installation requirements in hazardous areas. For the NRF590X PC board, the main board and communication board must be replaced as a set; they cannot be replaced individually.

It is recommended to regularly inspect sealing components and cable glands, and replace aging parts in a timely manner to maintain the instrument's protection rating and explosion-proof performance. For special versions or certification requirements, please contact the supplier and provide the TSP number.