Schneider AS111-2

Product Overview

Core Technical Specifications

• Input Signal Range: -10 V DC ~ +10 V DC, differential input
• Output Signal Options: 4–20 mA current loop / 0–10 V DC voltage
• Channel Quantity: 2 fully independent isolated channels
• Conversion Accuracy: ±0.1% full scale
• Linearity Error: ±0.05% full scale
• Digital Resolution: 16-bit DAC per channel
• Step Response Time: <1 ms
• Isolation Voltage (Primary ↔ Secondary): 2500 V AC 1 minute withstand
• Operating Supply Power: 24 V DC, total power consumption 2 W
• Operating Temperature Range: -40 °C ~ +85 °C
• Storage Temperature Range: -50 °C ~ +100 °C
• Physical Dimensions: 35 mm (H) × 22 mm (W) × 8 mm (D)
• Ingress Protection Class: IP66 (sealed plastic housing)
• Certifications: CE, ATEX II 3G Ex nA IIC T6 Gc, IECEx, UL508A

Function Features

1. Dual independent signal channels without cross-talk interference
2. Hardware galvanic isolation blocks common-mode noise and ground potential drift
3. Auto load impedance detection for 4–20 mA output loops
4. Overvoltage reverse polarity input protection on all signal terminals
5. Short-circuit self-recovery protection for current output channels
6. Built-in low-pass RC filter to suppress high-frequency PWM noise from servo controllers
7. Fixed transfer ratio with zero drift compensation circuit

Working Principle

Material Composition

• Outer Enclosure: Flame-retardant PA66 thermoplastic, UL94 V-0 fire rating
• Internal PCB: FR4 high-temperature glass fiber substrate, 2 oz copper trace
• Isolation Barrier: High-voltage ceramic dielectric film
• Terminal Contacts: Nickel-plated phosphor bronze alloy
• Internal Passive Components: Metal film precision resistors, polypropylene low-leakage capacitors

 Structural Characteristics

• Ultra-thin rectangular PCB form factor for dense DIN rail stack mounting
• Two symmetric signal terminal groups (Channel 1 / Channel 2) separated by isolation barrier
• Single-side surface-mount component layout for uniform heat dissipation
• Pre-drilled 2 mounting holes for M2 fastener fixation onto control backplanes
• Hermetically sealed internal cavity to prevent dust and moisture ingress

Advantage Highlights

1. Extended extreme temperature operating range supporting outdoor and hazardous zone deployment
2. Dual-channel design reduces cabinet space occupancy vs two single-channel modules
3. High isolation rating eliminates signal distortion in multi-drive machine systems
4. Self-recovering short-circuit protection removes requirement for external signal fuses
5. Compact micro-size compatible with custom servo amplifier backplane integration

Applicable Industries

• Heavy machinery servo motion control
• Oil & gas hazardous area process measurement
• Power plant generator excitation signal conditioning
• Railway traction control auxiliary signal conversion
• Mining underground automation signal transmission

Installation Requirements

1. Mount vertically on backplane or DIN rail with minimum 3 mm air gap between adjacent modules for heat dissipation
2. All signal wiring must use shielded twisted pair cable; cable shield single-point grounded at cabinet earth bar
3. 24 V DC supply wiring requires separate twisted pair independent from analog signal cables
4. Maximum wire gauge for terminal connection: 0.75 mm² solid copper
5. Mounting location must avoid direct contact with heat-generating power modules (minimum 50 mm separation distance)

Operation & Maintenance Precautions

1. Prohibit input voltage exceeding ±12 V DC to prevent permanent isolation amplifier damage
2. Do not operate in environments with condensed humidity; maintain ambient relative humidity below 90% non-condensing
3. Annual calibration required via precision signal generator to retain stated ±0.1% accuracy rating
4. Any physical damage to sealed housing voids isolation safety certification
5. Disconnect 24 V DC power supply before all wiring modification operations