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AX21EU Mitsubishi Electric
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Product Details
Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.
Product Overview
The AX21EU is a Mitsubishi Electric AC input module in the MELSEC-A (A/QnA) series. It provides 32 input points with photocoupler isolation for integration into PLC base units. Designed for monitoring AC field devices in industrial control systems, it accepts 200-240 VAC signals and offers LED indication for on-state detection. Typical applications include machinery control panels, discrete sensing inputs, and retrofit replacements in MELSEC-A systems. AX21EU is compatible with existing A-series bases and can replace QX28 modules with appropriate derating.
Best Suited For
- AC field device monitoring (200-240 VAC)
- Replacement of QX28 modules in existing A-series systems
- Large-point input scanning in machinery control
- Retrofit installations in MELSEC-A/QnA platforms
Input points
32
Rated voltage
200-240 VAC
Input current (typ.)
Approx. 12 mA (240 VAC, 60 Hz)
Inrush current
Max. 600 mA within 0.5 ms (264 VAC)
Weight
0.50 kg
Technical Specifications
I/O & Electrical
Input type
AC input
Isolation method
Photocoupler
Rated input voltage/frequency
200 to 240 VAC (+10/-15%), 50/60 Hz (±3 Hz)
Input voltage distortion
Within 5 %
Rated input current
Approx. 12 mA (240 VAC, 60 Hz)
Maximum simultaneous ON points
60 % (20 points)
ON voltage/ON current
≥ 160 VAC / ≥ 5.5 mA
OFF voltage/OFF current
≤ 70 VAC / ≤ 3.5 mA
Inrush current
Max. 600 mA within 0.5 ms (264 VAC)
Input impedance
Approx. 22 kΩ (60 Hz), approx. 24 kΩ (50 Hz)
Response time OFF→ON
≤ 15 ms (200 VAC, 60 Hz)
Response time ON→OFF
≤ 25 ms (200 VAC, 60 Hz)
Communication & Power
Internal current consumption (5 V DC)
150 mA (typ., all points ON)
Physical & Environmental
External dimensions H×W×D
250 × 37.5 × 131 mm
Weight
0.50 kg
Common terminal arrangement
32 points/common (TB9, TB18, TB27, TB36)
External interface
38-point terminal block connector (M3.5 × 6 screws)
Applicable wire size
0.75 to 2 mm² (AWG14 to AWG19)
Applicable solderless terminal
RAV1.25-3.5, RAV2-3.5
