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Enraf Tank Gauging

Communication Interface Unit (CIU888)

Tank farm operators rely heavily on their tank gauging and inventory monitoring systems. Honeywell’s new communication interface, CIU 888, ensures the availability of accurate and reliable tank measurement and calculated inventory data.

Overview
Tank farm operators rely heavily on their tank gauging and inventory monitoring systems. Honeywell’s communication interface, CIU 888, ensures the availability of accurate and reliable tank measurement and calculated inventory data to drive safety and efficiency in every tank farm application.

What is It?
The CIU 888 is a safe and reliable gateway between tank gauges and operational systems that manage inventories at bulk storage tank farms. It ensures reliable tank and product data is easily available to multiple users and that the right data is delivered to each user according to their task. Convenient tools promote the highest efficiency during commissioning and remote servicing of tank farm gauges. Compliance with relevant standards and legislation, meanwhile, is confirmed by authorities such as the Dutch NMI.
With the CIU 888, all measured and calculated data is continuously available for efficient operations, safe control of product movements and support for custody transfer and Weights and Measures (W&M) report printing.

How Does It Work?
CIU 888 integrates the field-proven concepts of Honeywell's CIU 880 solution into a single unit and takes data availability to the next level. All relevant tank parameters are continuously scanned and embedded tank
calculations provide tank inventory data according to API/ASTM standards. Traditional serial interfaces support existing applications without any change, while dedicated Ethernet connections provide open access. Furthermore, intelligent security measures prevent unauthorized access and loss of data.
The improved redundancy concept in the CIU 888, with continuously synchronized units, prevents process disruption, while guarding and maintaining the status and validity of data for W&M purposes. A smart user-concept includes a “Ring of Light” with an integrated LCD for a quick status overview. More detailed Web-based information is accessible remotely, supporting fast analysis and reducing service time.

What Problems Does it Solve?
CIU 888 enables Honeywell’s Enraf® tank inventory monitoring systems to deliver a more profitable, safer operation by:
  • Maximizing uptime and improving site safety and efficiency
  • Lowering the cost of ownership
  • Enhancing operator effectiveness through alarm management, clear displays and convenient tools
  • Meeting demands for expansions and future system requirements with a scalable solution
  • Ensuring compliance with API/ASTM standards and Weights & Measures legislation.
Specifications

Environmental Conditions

  • Ambient Temperature Range
    • 0 to +60 deg C (32 to 140 deg F)
  • Storage Temperature Range
    • -20 to 85 deg C (-4 to 185 deg F)
  • Relative Humidity
    • 0 to 90% RH (Non-Condensing)

Processing & Performance Metrics

  • User Interface
    • LCD Color Display (50 x 38 mm, 320 x 240 px), Navigation Keys, LED Ring for Status, Key Lock Switches for Config/W&M Sealing inch

I/O Capabilities

  • Tank Database Capacity
    • 80 tanks (one gauge per tank), 40 tanks (two gauges per tank)

Device & Network Capacity

  • Supported Gauges
    • All GPU-Enabled Tank Gauges (811, 813, 866, 854, 872, 873, 877, 894, 990, 954) and Emerson TRL/2

Redundancy & Synchronization

  • Redundancy
    • Hot Standby, Real-Time Synchronization
    • Redundant Ethernet Ports (redundancy controlled by Entis or modbus host)

Communication & Protocols

  • Protocols Supported
    • Modbus TCP/IP, OPC UA TCP, Serial Modbus, CIU 858/880 Emulation, Enraf BPM Fieldbus, TRL/2 Fieldbus, RS-232/RS-485
  • Host Connectivity
    • Ethernet/LAN-3X Modbus TCP/IP ethernet (FTEA, FTEB and Office LAN)
    • Serial Ports-2X modbus serial (+ 4 additional ports by using optional slots)
  • Field Connectivity
    • Available Option Boards - Enraf BPM fieldbus, Serial modbus (master) and Serial GPU input and TRL/2 Fieldbus
    • Field Ports - 6X option slots (of which 4 ports can be used for serial host connectivity)
    • Wireless Connectivity - ISA 100 via Honeywell WDM through TCP/IP to serial converters

Electrical Specifications

  • Power Supply
    • 100 to 240 VAC, Auto-Ranging (-15 to +10%), 45 to 65 Hz, max 60 VA (35 VA Nominal)

Software & Interface

  • Operating System
    • Linux Arch, 4 GB Flash Memory (Upgradable)

Applications & Compatibility

  • Mounting
    • Wall, Rack, or Tabletop
  • Applications
    • For all applications requiring accurate and reliable process and inventory data, such as refineries, tank farms and terminals. Data is suitable for custody transfer, safe product transfer and tank farm operation.

Technical Specifications

  • Function
    • Field scanning and communication interface for tank inventory applications with Optional embedded tank inventory calculation functionality

Mechanical & Physical Properties

  • Enclosure
    • IP30 (NEMA 1)

Dimensions & Weight

  • Dimensions
    • 400 x 93 x 283 mm (15-3/4 x 3-3/4 x 11-1/4 in)

Standards & Certifications

  • Approvals
    • IEC 61010-1:2010, EN 61010-1:2010, CE, CAN/CSA, UL Std. 61010-1, NAMUR NE 107, NMI (Netherlands)

Environmental Conditions

  • Ambient Temperature Range
    • 0 to +60 deg C (32 to 140 deg F)
  • Storage Temperature Range
    • -20 to 85 deg C (-4 to 185 deg F)
  • Relative Humidity
    • 0 to 90% RH (Non-Condensing)

Processing & Performance Metrics

  • User Interface
    • LCD Color Display (50 x 38 mm, 320 x 240 px), Navigation Keys, LED Ring for Status, Key Lock Switches for Config/W&M Sealing inch

I/O Capabilities

  • Tank Database Capacity
    • 80 tanks (one gauge per tank), 40 tanks (two gauges per tank)

Device & Network Capacity

  • Supported Gauges
    • All GPU-Enabled Tank Gauges (811, 813, 866, 854, 872, 873, 877, 894, 990, 954) and Emerson TRL/2

Redundancy & Synchronization

  • Redundancy
    • Hot Standby, Real-Time Synchronization
    • Redundant Ethernet Ports (redundancy controlled by Entis or modbus host)

Communication & Protocols

  • Protocols Supported
    • Modbus TCP/IP, OPC UA TCP, Serial Modbus, CIU 858/880 Emulation, Enraf BPM Fieldbus, TRL/2 Fieldbus, RS-232/RS-485
  • Host Connectivity
    • Ethernet/LAN-3X Modbus TCP/IP ethernet (FTEA, FTEB and Office LAN)
    • Serial Ports-2X modbus serial (+ 4 additional ports by using optional slots)
  • Field Connectivity
    • Available Option Boards - Enraf BPM fieldbus, Serial modbus (master) and Serial GPU input and TRL/2 Fieldbus
    • Field Ports - 6X option slots (of which 4 ports can be used for serial host connectivity)
    • Wireless Connectivity - ISA 100 via Honeywell WDM through TCP/IP to serial converters

Electrical Specifications

  • Power Supply
    • 100 to 240 VAC, Auto-Ranging (-15 to +10%), 45 to 65 Hz, max 60 VA (35 VA Nominal)

Software & Interface

  • Operating System
    • Linux Arch, 4 GB Flash Memory (Upgradable)

Applications & Compatibility

  • Mounting
    • Wall, Rack, or Tabletop
  • Applications
    • For all applications requiring accurate and reliable process and inventory data, such as refineries, tank farms and terminals. Data is suitable for custody transfer, safe product transfer and tank farm operation.

Technical Specifications

  • Function
    • Field scanning and communication interface for tank inventory applications with Optional embedded tank inventory calculation functionality

Mechanical & Physical Properties

  • Enclosure
    • IP30 (NEMA 1)

Dimensions & Weight

  • Dimensions
    • 400 x 93 x 283 mm (15-3/4 x 3-3/4 x 11-1/4 in)

Standards & Certifications

  • Approvals
    • IEC 61010-1:2010, EN 61010-1:2010, CE, CAN/CSA, UL Std. 61010-1, NAMUR NE 107, NMI (Netherlands)
  • Ambient Temperature Range : 0 to +60 deg C (32 to 140 deg F)
  • User Interface : LCD Color Display (50 x 38 mm, 320 x 240 px), Navigation Keys, LED Ring for Status, Key Lock Switches for Config/W&M Sealing inch
  • Tank Database Capacity : 80 tanks (one gauge per tank), 40 tanks (two gauges per tank)
  • Supported Gauges : All GPU-Enabled Tank Gauges (811, 813, 866, 854, 872, 873, 877, 894, 990, 954) and Emerson TRL/2
  • Storage Temperature Range : -20 to 85 deg C (-4 to 185 deg F)
  • Relative Humidity : 0 to 90% RH (Non-Condensing)
  • Redundancy : Hot Standby, Real-Time Synchronization|Redundant Ethernet Ports (redundancy controlled by Entis or modbus host)
  • Protocols Supported : Modbus TCP/IP, OPC UA TCP, Serial Modbus, CIU 858/880 Emulation, Enraf BPM Fieldbus, TRL/2 Fieldbus, RS-232/RS-485
  • Power Supply : 100 to 240 VAC, Auto-Ranging (-15 to +10%), 45 to 65 Hz, max 60 VA (35 VA Nominal)
  • Operating System : Linux Arch, 4 GB Flash Memory (Upgradable)
  • Mounting : Wall, Rack, or Tabletop
  • Host Connectivity : Ethernet/LAN-3X Modbus TCP/IP ethernet (FTEA, FTEB and Office LAN)|Serial Ports-2X modbus serial (+ 4 additional ports by using optional slots)
  • Function : Field scanning and communication interface for tank inventory applications with Optional embedded tank inventory calculation functionality
  • Field Connectivity : Available Option Boards - Enraf BPM fieldbus, Serial modbus (master) and Serial GPU input and TRL/2 Fieldbus|Field Ports - 6X option slots (of which 4 ports can be used for serial host connectivity)|Wireless Connectivity - ISA 100 via Honeywell WDM through TCP/IP to serial converters
  • Enclosure : IP30 (NEMA 1)
  • Dimensions : 400 x 93 x 283 mm (15-3/4 x 3-3/4 x 11-1/4 in)
  • Approvals : IEC 61010-1:2010, EN 61010-1:2010, CE, CAN/CSA, UL Std. 61010-1, NAMUR NE 107, NMI (Netherlands)
  • Applications : For all applications requiring accurate and reliable process and inventory data, such as refineries, tank farms and terminals. Data is suitable for custody transfer, safe product transfer and tank farm operation.
Brochure
Name
Description
File Size
Date
Size
This brochure portrays a complete overview of our solutions for terminal automation
application/pdf 2.05 MB
3/9/2022
2.05 MB
Manuals and Guides
Name
Description
File Size
Date
Size
The purpose of this manual is to provide information about managing the CIU 888, and the CIU admin user account in particular
application/pdf 1.34 MB
5/6/2025
1.34 MB
Data Sheet
Name
Description
File Size
Date
Size
Communication Interface Unit CIU888 Technical Specifications English Tags:
application/pdf 3.59 MB
6/25/2025
3.59 MB
Case Study
Name
Description
File Size
Date
Size
2212200 HPS CAS Valero Dublin Customer Success Story A4
application/pdf 1.54 MB
12/5/2023
1.54 MB
Name
Description
File Size
Date
Size
Communication Interface Unit CIU888 Technical Specifications English Tags:
application/pdf 3.59 MB
6/25/2025
3.59 MB
This brochure portrays a complete overview of our solutions for terminal automation
application/pdf 2.05 MB
3/9/2022
2.05 MB
The purpose of this manual is to provide information about managing the CIU 888, and the CIU admin user account in particular
application/pdf 1.34 MB
5/6/2025
1.34 MB
2212200 HPS CAS Valero Dublin Customer Success Story A4
application/pdf 1.54 MB
12/5/2023
1.54 MB
Name
Description
File Size
Date
Size
This brochure portrays a complete overview of our solutions for terminal automation
2.05 MB
3/9/2022
The purpose of this manual is to provide information about managing the CIU 888, and the CIU admin user account in particular
1.34 MB
5/6/2025
Communication Interface Unit CIU888 Technical Specifications English Tags:
3.59 MB
6/25/2025
2212200 HPS CAS Valero Dublin Customer Success Story A4
1.54 MB
12/5/2023
Name
Description
File Size
Date
Size
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