Overview
This document is the general specification sheet for Yokogawa Electric's FIO (Fieldnetwork I/O) system (document number: GS 33K50F10-50E), updated to version 8 in September 2014. Its core purpose is to guide the deployment, module selection, and installation of the system in CENTUM VP (Vnet/IP). As a field I/O solution, the FIO system is connected to the field control unit (FCU) through ESB/optical ESB/ER bus, supporting dual redundancy configuration and adapting to the signal acquisition and control needs of various industrial scenarios. The module types cover all categories such as analog, digital, and communication, and meet multiple international safety and EMC standards.
System architecture and bus specifications
(1) Overall architecture
The FIO system is based on the core architecture of "FCU+node unit+bus". The node unit includes a power module, a bus interface module, and an I/O module, which can be extended in a chain/star configuration through an optical ESB bus relay unit (ANT10U). It supports dual redundancy configuration (power supply, bus, I/O module) to ensure high availability of the system.
(2) Three major bus core specifications
Bus type suitable for FCU transmission rate, transmission distance support, node unit topology structure
ESB bus AFV30 /AFV40 /AFV10 128 Mbps ≤ 10m ANB10 bus type
Optical ESB bus AFV30 /AFV40 128 Mbps up to 50km (ANT411 relay) ANB11 , ANT10U chain/star type
ER bus AFV10 10 Mbps YCB141: ≤ 185m; Hybrid cables must meet the formula limit ANR10 bus type
Core Component Details
(1) Control Unit (FCU)
Model series type installation method adaptation bus
AFV30 (S/D) standard/dual redundant 19 inch rack mounted ESB/optical ESB bus
AFV40 (S/D) standard/dual redundant with cabinet ESB/optical ESB bus
AFV10 (S/D) standard/dual redundant 19 inch rack mounted ESB/ER bus
(2) Node unit and relay unit
Unit type, model series, functional redundancy support
ESB node unit ANB10 (S/D) connects to the ESB bus and installs I/O module single/dual redundancy
Optical ESB node unit ANB11 (S/D) is connected to the optical ESB bus with optical relay single/dual redundancy
ER node unit ANR10 (S/D) is connected to the ER bus and installed with I/O module single/dual redundancy
Optical ESB relay unit ANT10U optical ESB bus extension, supporting chain/star type-
(3) I/O module classification and core parameters
The FIO system I/O modules cover 6 major categories, with the following key parameters (representative models):
Module type, representative model, number of channels, signal type, isolation characteristics, power consumption (5V DC/24V DC)
Analog input AAI141 16 4~20 mA non isolated 310 mA/450 mA
Analog output AAI543 16 4~20 mA isolated 230 mA/540 mA
TC/mV input AAT141 16 TC (J/K/E, etc.), -100~150 mV isolation 450 mA/-
Digital input ADV151 32 24 V DC isolated 500 mA/-
Digital output ADV551 32 24 V DC isolated 700 mA/-
Communication module ALF111 4-port Foundation Fieldbus (31.25 kbps) -500 mA/-
Turbomachinery module AGP813 26 high-speed protection signal isolation 900 mA/-
Built in isolation barrier module ASI133 8 4~20 mA isolation 150 mA/450 mA

Environmental and power specifications
(1) Environmental requirements
Environmental parameters, working status, transportation/storage status
Temperature range of 0-60 ℃ (standard); -20~70 ℃ (wide temperature option) -40~85 ℃ (wide temperature option)
Humidity 5-95% RH, no condensation 5-95% RH, no condensation
Temperature change rate ± 10 ℃/h ± 20 ℃/h
Vibration 1-14Hz: displacement ≤ 0.25mm; 14-100Hz: acceleration ≤ 2.0 m/s ²-
Dust ≤ 0.3 mg/m ³-
Altitude ≤ 2000 meters-
(2) Power specifications
Communication input: 100-120V AC (± 10%) or 220-240V AC (± 10%), frequency 50/60Hz (± 3Hz), distortion ≤ 10%
DC input: 24V DC (± 10%), ripple rate ≤ 1% p-p
Instantaneous power outage tolerance: ≤ 20ms (under rated AC voltage)
Grounding requirements: independent grounding, grounding resistance ≤ 100 Ω

Connection method and terminal configuration
(1) Signal connection method
The module supports three connection methods to adapt to different on-site requirements:
Pressure clamping terminal: directly connected to on-site equipment, supporting single/double redundant terminal blocks
Specialized cables (such as YCB301, YCB141): connecting modules to terminal boards
MIL connector cable: No terminal block required for direct connection, equipped with anti loosening sheath (ACCC01)
(2) Example of Terminal and Module Combination
Module type pressure clamping terminal dedicated cable MIL connector cable
Analog I/O (AAI141/AAI543) Support Support Support
Digital I/O (ADV151/ADV551) supports partial support
Communication module (ALF111/ALP111) partially supported but not supported
Built in isolation barrier module (ASI133/ASD143) is not supported
Installation restrictions and precautions
(1) Power capacity limitation
Module installation must comply with the "factor summation" rule to avoid power overload:
Installation location application scenario factor summation threshold
ANB10 /ANB11 /ANR10 Non hazardous area ≤ 100
ANB10 - E/ANB11 - E/ANR10 - E Hazardous Area ≤ 88
ANB10 F/ANB11 F/ANR10 F Hazardous area ≤ 80
AFV10D/AFV30D (dual redundancy) non hazardous area factor A ≤ 20; Factor A+Factor B ≤ 65
(2) Spacing and isolation requirements
The intrinsic safety zone and non intrinsic safety zone must maintain a distance of ≥ 50mm. The node unit (ANB10 ) needs to be equipped with an insulation partition (T9083NA), and the FCU (AFV10 /AFV30 ) needs to be equipped with an insulation partition kit (T9083ND);
The built-in isolation barrier module needs to be installed separately from other modules to avoid electromagnetic interference.
(3) Special environment and module limitations
Wide temperature environment (60-70 ℃): A maximum of 4 IOMs can be installed on a single node, and slots need to be left between modules. Installation of AAI543- 6 /- F (quick response type) is prohibited;
TC input module (AAT141/AAT143): It should be kept away from heat sources (such as CP461, bus interface module), avoid direct airflow, and can only be installed adjacent to designated modules (AAT141, AAR181, etc.);
Dual redundancy configuration: I/O modules need to be installed in paired slots (IO1-IO2, IO3-IO4, etc.), and empty slots need to be protected with a false cover plate (ADCV01).
Compliance standards
Safety standards: CSA, CE Marking, EAC Marking;
EMC standards: CE Marking, EAC Marking, RCM, KC Marking (excluding built-in isolation barrier modules);
Explosion proof standards: CSA/FM Non Intrinsic, Type n, Type i, FM certified.

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