OPTO 22 001818K-AC24-AT AC 24V Input Control Module | Replacement, Equivalent & Selection Guide
The OPTO 22 001818K-AC24-AT is a high-reliability AC 24V discrete input module designed for the OPTO 22 G4 I/O system. Whether you need an exact OEM replacement, a compatible equivalent, or guidance on selecting the right module for your control architecture, Konmask.com provides verified sourcing and expert selection support for industrial automation buyers worldwide.
Technical Specifications
| Part Number | 001818K AC24 AT |
| Brand | OPTO 22 |
| Module Type | Discrete AC Input Module |
| Input Voltage | AC 24V |
| Series | G4 I/O / Pamux Compatible |
| Mounting | G4 Rack / Mounting Rack Compatible |
| Isolation | Optically Isolated |
| Operating Temperature | 0°C to 70°C |
| Weight | 1,240 g (packaged) |
| Compliance | UL Listed, CE Marked |
Compatible Replacement & Equivalent Models
The following models are commonly used as direct or functional replacements for the OPTO 22 001818K-AC24-AT. Compatibility depends on your rack, controller, and firmware version — contact us for a verified match before ordering.
- OPTO 22 G4IAC24 — Direct functional equivalent, same AC 24V input rating
- OPTO 22 G4IAC24A — Enhanced version with extended temperature range
- OPTO 22 SNAP-IAC-24 — SNAP platform equivalent for SNAP I/O racks
- OPTO 22 G4IDC5 — DC 5V input alternative for DC-powered field devices
- Third-party G4-compatible AC24 modules — Available upon request; verified for pin and signal compatibility
Note: Always verify rack type, controller firmware, and signal wiring before substituting modules. Konmask engineers can assist with compatibility confirmation.
Why Choose the Original Model
- Guaranteed OEM Compatibility — Plug-and-play with existing OPTO 22 G4 racks and controllers without firmware changes
- Proven Field Reliability — Thousands of units deployed in industrial environments globally
- Full OPTO 22 Ecosystem Support — Seamless integration with PAC Project, ioControl, and SNAP PAC systems
- Optical Isolation — Protects PLC backplane from field-side voltage transients and noise
- Long Product Lifecycle — OPTO 22 maintains backward compatibility across generations
Typical Applications
- AC 24V field device status monitoring (limit switches, proximity sensors, pushbuttons)
- Building automation and HVAC control systems
- Water and wastewater treatment plant I/O
- Food and beverage processing line control
- Oil & gas facility monitoring panels
- Machine tool and conveyor system integration
System Compatibility
- Racks: OPTO 22 G4 4-channel and 16-channel racks (G4PB4, G4PB16, G4PB32)
- Controllers: SNAP PAC R-series, SNAP PAC S-series, Brainboards (B1, B2)
- Software: PAC Project Basic/Professional, ioControl, OptoControl
- Wiring: Standard G4 field wiring terminals; no special adapters required
Selection Guide
Use the following criteria to confirm the 001818K-AC24-AT is the right module for your application:
- Field Voltage: Confirm your field devices output or switch AC 24V signals
- Rack Type: Verify you have a G4-compatible rack (not SNAP or older Pamux)
- Channel Count: This is a single-channel module — plan rack slots accordingly
- Environment: Standard temperature range (0–70°C); choose G4IAC24A for extended range
- Quantity: Volume pricing available for orders of 10+ units — contact us for a quote
Not sure which module fits your system? Email our selection team with your rack model and controller type for a free recommendation.
Quality Assurance & Sourcing
- Verified Supply Chain — Sourced from authorized distributors and certified secondary market channels
- Pre-shipment Inspection — Each unit undergoes visual, label, and functional verification
- Authenticity Guarantee — Counterfeit modules rejected; documentation available on request
- Traceability — Lot numbers and sourcing records maintained for every shipment
- Warranty — 90-day replacement warranty on all stocked units
How to Order
- Add to Cart — Click the order button above for standard stock units
- Request a Quote — Email [email protected] for volume pricing or urgent delivery
- Provide Your PO — We accept purchase orders from verified industrial buyers
- Shipping — DHL / FedEx / UPS express worldwide; same-day dispatch for in-stock orders placed before 14:00 CST
- Documentation — Commercial invoice, packing list, and COO certificate included
Replacement & Compatibility FAQ
Q: Can I use G4IAC24 as a direct drop-in replacement for 001818K-AC24-AT?
A: In most cases, yes. Both are AC 24V G4 input modules. Verify your rack revision and firmware version to confirm full compatibility.
Q: Is this module compatible with SNAP racks?
A: No. The 001818K-AC24-AT is designed for G4 racks only. For SNAP racks, use the SNAP-IAC-24 instead.
Q: Do you supply new or refurbished units?
A: We supply both. New OEM units are available for most part numbers. Refurbished units are tested and carry a 90-day warranty. Specify your preference when ordering.
Q: Can you source discontinued OPTO 22 modules?
A: Yes. Konmask specializes in sourcing legacy and discontinued automation components. Contact us with your part number and required quantity.
Q: What is the lead time for bulk orders?
A: Standard stock ships within 1–3 business days. For large quantities (>50 units), lead time is 5–10 business days depending on sourcing.
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