Yokogawa AAI135-H50 Analog Input Module 8-Channel 4–20mA

Description

Product Overview – Yokogawa AAI135-H50 Analog Input Module

• Brand: Yokogawa
• Model: AAI135-H50
• Series: AAI135 Analog Input Series
• This module captures 4–20 mA signals with high stability.
• Supports 8 isolated input channels in one compact unit.
• Each channel stays electrically separated for safety.
• Isolation exists between field wiring and system side.
• Works in dual redundant systems.
• Designed for PLC and DCS signal acquisition.
• Built for harsh industrial environments.
• HART communication supported on H-suffix models.

Core Technical Data

• Signal type: 4–20 mA analog input
• Channel count: 8 channels, fully isolated
• Allowable input current: up to 25 mA
• Input resistance (power ON): 290–450 Ω
• Input resistance (power OFF): ≥500 kΩ
• Accuracy: ±16 µA
• Temperature drift: ±16 µA per 10 °C
• Data update period: 10 ms fast refresh
• Withstand voltage channel/system: 500 V AC, 1 minute
• Withstand voltage channel/channel: 500 V AC, 1 minute
• Transmitter supply: 15.0 V min at 20 mA
• Transmitter supply: 29.3 V max at 0 mA
• Current consumption: 360 mA at 5 V DC
• Current consumption: 450 mA at 24 V DC
• Weight: 0.3 kg
• Dimensions: 130 × 107.5 × 32.8 mm
• Operating temperature option: −20 to 70 °C (G3 option)

Measurement Performance

• Measurement range: 4–20 mA loop signals
• Resolution: high-resolution internal conversion
• Linearity: industrial precision class
• Sensitivity: optimized for low signal drift
• Response speed: 10 ms sampling cycle
• Noise immunity: strong channel isolation design
• Interference protection: surge absorber options available
• Environmental tolerance: G3 coating option

Isolation & Protection

• Channel-to-channel electrical isolation.
• Field-to-system electrical isolation.
• Reduces ground loop risk.
• Improves signal reliability.
• Optional surge absorber terminal blocks.

Installation Guide

• Mount on compatible Yokogawa base unit.
• Use KS1 dedicated cables when required.
• Supports pressure clamp terminals.
• Supports MIL connector cables.
• Check polarity before loop wiring.
• Verify loop power capacity.
• Keep signal cables separated from power lines.

Commissioning & Maintenance

• No complex calibration required.
• Fast channel verification via DCS tools.
• Hot-swap supported in many systems.
• Clear channel diagnostics in controller.
• Low drift reduces recalibration work.
• Plug-in terminal design saves time.

Compatibility

• Compatible with Yokogawa control platforms.
• Works with redundant controller setups.
• Supports HART field transmitters.
• Fits standard AAI135 series slots.
• Works with ISA Standard G3 option sets.

Available Variants & Options

• -S: Standard type
• -H: With HART communication
• /13A00: KS cable interface adapter
• /K4A00: KS cable interface adapter type K
• /13S00: Pressure clamp terminal block
• /13S10: Terminal block with surge absorber
• /13D00: Dual terminal block
• /13D10: Dual block with surge absorber
• /CCC01: MIL connector cover

Diagnostics Capability

• Channel status visible in system tools.
• Detects abnormal loop current.
• Helps find wiring faults quickly.
• Supports smart device diagnostics via HART.

Typical Application Scenarios

• Process control systems.
• Oil and gas plants.
• Chemical production lines.
• Power generation facilities.
• Water treatment systems.
• Factory automation lines.

Certifications & Compliance

• Industrial control grade design.
• Meets Yokogawa platform standards.
• G3 conformal coating option available.

Packing List

• 1 × AAI135-H50 module
• Terminal block or adapter (if ordered)
• Product label and trace code
• Anti-static protective packaging

Warranty & Shipping

• Warranty: 12 months
• Tested before shipment.
• Global delivery supported.
• Courier: FedEx, UPS, DHL
• Express options available.

FAQ – Practical Questions

• Can this module read 0–20 mA?
• It is optimized for 4–20 mA loops.
• Does each channel isolate separately?
• Yes. Every channel has independent isolation.
• Can I use HART transmitters?
• Yes. Choose the H-suffix version.
• Is it good for noisy sites?
• Yes. Isolation and surge options help greatly.
• Do I need external loop power?
• Check transmitter needs and loop design first.
• How do I reduce reading errors?
• Use shielded cables and proper grounding.
• Which option suits outdoor plants?
• Select G3 coating and surge terminal types.

Selection Guidance

• Choose -H if HART data is required.
• Select surge terminal options for unstable grids.
• Use dual blocks for redundant wiring.
• Confirm controller compatibility before ordering.

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