YOKOGAWA FA-M3 Embedded Machine Controller

Voltage resistance: power terminal - grounded 1500V AC/1 minute, signal terminal - grounded 1000V AC/1 minute

Leakage current: ≤ 3.5mA (AC power module)

Insulation resistance: ≥ 5M Ω (tested at 500V DC)

Allow instantaneous power outage: Standard mode up to 20ms, immediate detection mode up to 2-10ms (depending on power module model)

（3） Performance indicators

CPU processing speed: Basic instructions 0.00375 μ s-0.36 μ s/step (depending on model)

I/O response time: The fastest digital quantity is 50 μ s, and the fastest high-speed module is 0.1ms

Communication speed: Ethernet up to 100Mbps, PROFIBUS-DP up to 12Mbps, YHSLS up to 12Mbps

Scalability: Up to 7 slave units, 32 FA link H module sites, and a maximum of 8192 I/O points per system

Installation and wiring specifications

（1） Installation requirements

1. Fixed method

DIN rail installation (F3BU04/06/05/09/13) or M4 screw fixation (all models)

F3BU16-0N only supports screw fixation and does not support DIN rails

2. Installation gap and space

Vertical installation spacing ≥ 8cm, unobstructed upper and lower ventilation openings

The module installation needs to be tightened to the buckle lock, and additional screws are required to fix it in the vibration environment

Installation of fiber optic modules requires reserved bending radius: temporary laying of fiber optic cables ≥ 15mm, fixed laying ≥ 50mm; temporary laying of fiber optic cables ≥ 50mm, fixed ≥ 100mm

3. Environmental adaptation

Avoid direct sunlight and stay away from heat sources such as transformers and electromagnetic switches

Space heaters are required for condensation risk environments, and preheating is necessary before starting at low temperatures

（2） Wiring specifications

1. Conductor requirements

Only copper conductors are allowed, with a cross-sectional area of 0.33-2.1mm ² (AWG14-22)

Conductor temperature resistance ≥ 75 ℃, grounding cable cross-sectional area ≥ 2mm ²

2. Terminal torque

M3 screw: 0.8N · m, M3.5 screw: 0.8-1.2N · m, M4 screw: 1.2N · m

Terminal block screw tightening torque 0.22-0.6N · m (depending on model)

3. Anti interference measures

The distance between power cables and signal cables is ≥ 20cm, and analog and digital signals are routed in separate slots

Both ends of the shielded cable should be grounded, and the signal cable should be kept away from the power cable (≥ 20cm)

The input line of the power module adopts twisted pair cable and is equipped with ferrite core (in noisy environment)

4. Grounding requirements

Protective grounding (FG): connected to a protective grounding grid that complies with national standards, with a grounding resistance of ≤ 100 Ω

Functional grounding (FG): Low impedance grounding, CE compliance requires the use of braided wire

The LG terminal (line filter grounding) needs to be properly grounded, otherwise it may generate a half wave potential

（3） CE/UL/UKCA compliance requirements

EMC compliance: EN 61326-1 Class A, EN 55011 Class A, for use in industrial environments (residential environments require additional anti-interference measures)

LVD compliance: EN 61010-1, EN IEC 61010-2-201, overvoltage category II, pollution level 2

RoHS compliance: EN IEC 63000 standard

UKCA certification: The importer for the UK market is Yokogawa United Kingdom Limited

Testing and maintenance process

（1） Test running steps

Installation inspection: The module is securely installed, the panel is well ventilated, and the gap meets the requirements

Wiring inspection: correct polarity, terminal tightening, shielding layer grounding, cable routing compliance

Insulation test: 500V DC megohmmeter test, insulation resistance ≥ 5M Ω

Power supply test: Measure the power supply voltage and confirm that it meets the module input requirements

Power on test: If the power indicator light (RDY) is constantly on, it is normal. Check that the module has no abnormal heating

Functional testing: First test the emergency stop and other safety circuits → Single module functional testing → System linkage testing → Automatic operation testing → Fault simulation testing

（2） Maintenance points

1. Regular maintenance

Cleaning: Wipe the panel with a soft cloth and neutral detergent to prevent moisture from entering the interior of the module

Inspection: Regularly check cable connections, terminal fastening, and module indicator light status

Spare parts replacement: Modules that have been in use for over 10 years require preventive replacement; The built-in lithium battery in the CPU module (with a lifespan of ≥ 10 years at room temperature) needs to be checked regularly

2. Fault handling

Self diagnostic function: After the CPU module is powered on, it automatically performs hardware initialization, RAM check, and I/O configuration check. When there is a fault, it prompts through indicator lights and error codes

Common faults: abnormal power supply (check voltage/fuse), communication faults (check cables/grounding), I/O unresponsive (check wiring/module installation)

Error code: including Error (1-4) and Alarm (6-10) series, corresponding to voltage, temperature, A/D conversion, memory and other faults respectively

3. Module replacement

Power off operation: Before plugging or unplugging modules, the power must be turned off to avoid damaging components