YOKOGAWA FIO System Overview (for Vnet/IP)

Core architecture and components of the system

（1） Overall system architecture

The FIO system adopts a three-level architecture of "FCU+node unit+I/O module", which realizes data transmission through three types of buses: ESB/optical ESB/ER, and supports dual redundancy configuration (Vnet/IP bus, communication bus, and module all support redundancy). The typical configuration is as follows:

Top level: Field Control Unit (FCU), responsible for data processing and issuing control instructions;

Middle level: Node unit, serving as the connection hub between FCU and I/O module, including power module and bus interface module;

Bottom layer: I/O module, responsible for the acquisition and output of on-site signals (analog/digital/communication).

（2） Detailed explanation of core hardware components

1. On site Control Unit (FCU)

Model series, type, structure, form, adaptation, bus, key characteristics

AFV10  (AFV10S/AFV10D) Standard 19 inch rack mounted (single redundant S/double redundant D) ESB bus, ER bus basic control function, supports LFS1500 database, and can connect up to 14 node units after expansion

AFV30  (AFV30S/AFV30D) Advanced 19 inch rack mounted (single/double redundant) ESB bus and optical ESB bus require installation of EC401/EC402 coupling module, supporting LFS1700 database, with a maximum of 13 node units after expansion

AFV40  (AFV40S/AFV40D) Enhanced with Cabinet (Single/Double Redundancy) ESB Bus, Optical ESB Bus Built in EC401/EC402 Module, Maximum 11 Node Units Installed in Single Cabinet, Prohibited for Use in Hazardous Areas

Node units and relay units

Unit type, model, bus type, core function, redundancy support

ESB bus node units ANB10S/ANB10D are connected to the full range of AFV FCUs via the ESB bus, compatible with most I/O modules with single redundancy (S)/dual redundancy (D)

Optical ESB bus node unit ANB11S/ANB11D Optical ESB bus supports long-distance transmission, with built-in optical relay module single redundancy (S)/dual redundancy (D)

The ER bus node units ANR10S/ANR10D are only compatible with AFV10  FCU and support specific I/O module single redundancy (S)/dual redundancy (D)

Optical ESB relay unit ANT10U optical ESB bus extends the transmission distance of optical ESB, supporting chain/star topology and requiring the use of ANT401/ANT411 and other relay modules

Classification and core specifications of I/O modules

I/O modules are divided into 5 categories, supporting various configurations such as isolated/non isolated, explosion-proof/non explosion-proof, etc. The core parameters are as follows:

Module category represents model, channel number, signal type, isolation characteristics, explosion-proof level, temperature range

Analog input module AAI141 16 channel 4-20mA (non isolated) non isolated CSA NI, FM NI 0-60 ℃

Analog output module AAI543 16 channel 4-20mA (isolated) Isolation Type n, Type i 0-60 ℃ (fast response type)

Digital input module ADV151 32 channel 24V DC isolated CSA NI, FM NI 0-60 ℃

Digital output module ADV551 32 channel 24V DC isolation Type n, Type i 0-60 ℃

Communication module ALR111 2-port RS-232C non isolated CSA NI, FM NI 0-50 ℃

Turbomachinery module AGS813 12 channel servo signal isolation -0-50 ℃

Built in isolation barrier module ASI133 8-channel 4-20mA input isolation Type i, FM intrinsic safety 0-60 ℃

（3） Comparison of Bus Communication Specifications

The system supports three types of communication buses: ESB, optical ESB, and ER, with the following differences in core parameters:

Bus type transmission rate transmission medium maximum distance topology structure adaptation FCU redundancy support

ESB bus 128Mbps dedicated cable (YCB301) 10m (EC401) bus type AFV10 /AFV30 /AFV40  supported

Optical ESB bus 128Mbps single-mode fiber (LC interface) 50km (ANT411 relay) bus type/chain/star type AFV30 /AFV40  support

ER bus 10Mbps coaxial cable (YCB141/YCB311) 185m (YCB141) bus type AFV10  supported

Bus connection restrictions (according to FCU and database configuration)

FCU model database configuration ESB/optical ESB node unit upper limit ER node unit upper limit Total node unit upper limit

AFV10 LFS1500 3 3 3

AFV10 LFS1500+LFS1550 9 14 14

AFV30/AFV40 LFS1700 3 - 3

AFV30/AFV40 LFS1700+LFS1750-V1 9 - 9

AFV30/AFV40 LFS1700+LFS1750-V2 13 - 13

Environmental and power specifications

（1） Environmental parameters

Project Standard Scope Extension Options (Partial Modules) Remarks

Working temperature FCU: 0-50 ℃; Node Unit: 0-60 ℃ Node Unit: -20-70 ℃ ER Bus Node Unit - Warm up for 10 minutes to start at 20-0 ℃

Storage temperature -20-60 ℃ -40-85 ℃ Avoid direct sunlight

Relative humidity 5-95% RH (no condensation) 5-95% RH (no condensation) Consistent throughout the entire scene

Temperature change rate working: ± 10 ℃/h; storage: ± 20 ℃/h --

Altitude ≤ 2000m --

Vibration 1-14Hz (0.25mm amplitude); 14-100Hz (2.0m/s ²) - Continuous vibration requirements

Impact transportation: horizontal 49.0m/s ²; Vertical 98.0m/s ² - in packaging state

Corrosion gas ANSI/ISA S71.04 G2 ANSI/ISA S71.04 G3 optional G3 level protection

Static protection contact discharge ≤ 4kV; air discharge ≤ 8kV --

（2） Power parameters

Power type, voltage range, frequency/ripple, key characteristics

AC power supply 100-120V AC ± 10%; 220-240V AC ± 10% 50/60Hz ± 3Hz; Distortion rate ≤ 10%, instantaneous power-off tolerance ≤ 20ms

DC power supply 24V DC ± 10% ripple ≤ 1% p-p-

Grounding requires independent grounding, with a grounding resistance of ≤ 100 Ω - to ensure electromagnetic compatibility and safety

Module signal connection and terminal configuration

（1） Signal connection method

Connection Type Applicable Scenarios Support Modules Key Accessories

The pressure clamp terminal is directly connected to the terminal block of most analog/digital modules in the field equipment, with single redundancy (such as ATA4S) and double redundancy (such as ATA4D)

The dedicated cable is connected through the terminal board and compatible with the ST series module ATK4A adapter and KS series cable (such as KS1/KS2)

MIL connector cable directly connects to module specific analog modules (such as AAI141). Customers provide their own cables and require cable connector covers (ACCC01)

（2） Typical Module Terminal Block Combination Example

Module Model Terminal Block (Single Redundancy) Terminal Block (Double Redundancy) Compatible with Cable Terminal Board

AAI141 (4-20mA input) ATA4S ATA4D KS1 AEA4D

ADV151 (24V DC input) ATB5S ATB5D AKB331 AED5D

ALF111 (FF-H1 communication) ATF9S ATF9S (external wiring redundancy) AKB336 AEF9D

ASI133 (built-in isolation gate input) ATSA3S ATSA3D --

（3） I/O module current consumption

Core module current consumption (5V DC/24V DC):

Module model 5V DC maximum consumption (mA) 24V DC maximum consumption (mA)

AAI141 (analog input) 310 450

ADV151 (digital input) 500-

ADV551 (digital output) 700-

ALR111 (RS-232C communication) 500-

ASI133 (built-in isolation gate input) 150 450

AGP813 (high-speed protection module) 900-

Installation restrictions and compliance requirements

（1） Power capacity limit (module factor sum constraint)

Installation scenario module factor calculation rule upper limit requirements

Node units (non hazardous areas) only count factor B ≤ 100

Node unit (danger zone, ANB10 -  E) only counts factor B ≤ 88

Node unit (danger zone, ANB10 -  F) only counts factor B ≤ 80

Dual redundant FCU (AFV10D/AFV30D, non hazardous area) factor A ≤ 20; Factor A+B ≤ 65-

Dual redundant FCU (AFV10D/AFV30D, hazardous area) factor A ≤ 5; Factor A+B ≤ 65-

Example of Core Module Factors

Module Model: Single Redundancy Factor A Single Redundancy Factor B Double Redundancy Factor B

AAI141 0 16 16

AAI543 (Standard Response) 0 21 25

AAI543 (Quick Response) 0 21 29

ADV151 0 0 0

ASI133 0 22 33

AGP813 3 0 6

（2） Temperature related installation restrictions

60-70 ℃ environment: Each node can install up to 4 I/O modules, and slots need to be left empty between modules; Two empty slots need to be left for dual redundant I/O modules; Prohibit the installation of AAI543 quick response module;

Specific module temperature constraints: Modules such as AAP149 and ADV157 only support 0-50 ℃; AAI543 quick response type supports 0-60 ℃;

Thermocouple module (AAT141/AST143): It should be kept away from heat sources and blown directly by the airflow. Only specific modules (such as AAT145, ASR133) can be installed adjacent to it. AFV40  cabinet should be installed in slots 3, 4, 5, 7, 8, 9, and 10.

（3） Explosion proof and isolation requirements

The built-in isolation barrier module (such as ASI133, ASD143) needs to maintain a distance of ≥ 50mm from non intrinsic safety modules. The ANB10  node unit needs to install an insulation partition (T9083NA), and the AFV10 /AFV30  needs to install an insulation partition kit (T9083ND);

Explosion proof level adaptation: Type i (intrinsic safety) or Type n (non sparking) modules are preferred for hazardous areas, and ADR541 does not support Type n level;

Wiring specification: The cross-sectional area of the explosion-proof module connecting conductor should be ≤ 1.25mm ², and it should be connected sequentially from the CH1 terminal.

（4） Special restrictions on module installation

Communication and Turbomachinery Module: ALP111 and ALP121 cannot be mixed; AFV10 does not support ALP121; AFV10 can install up to 8 modules such as ALR111/ALR121 (dual redundant 4 pairs);

Bus interface module: EB401 is installed in odd numbered slots with a blank slot on the right side; EC401/EC402 dual redundancy is installed in slots 7 and 8;

Empty slot protection: Dust covers (ADCV01) are required for slots without I/O modules installed;

Dual redundancy configuration: I/O modules need to be installed in adjacent slots (IO1-IO2, IO3-IO4, etc.), and terminal blocks need to use dual redundancy type.

（5） Compliance standards

Safety standards: CSA, CE Marking, EAC Marking (except for ARS series and ADR541 parts);

EMC standards: CE Marking, EAC Marking, RCM, KC Marking (excluding built-in isolation barrier modules);

Explosion proof standard: CSA Non-Incendive、FM Non-Incendive、Type n、Type i（Intrinsic Safety）、FM Intrinsic Safety。