{"product_id":"allen-bradley-1746-im4-slc-500-4-point-ac-input-module-240v","title":"Allen-Bradley 1746-IM4 SLC 500 | 4-Point AC Input Module 240V","description":"\u003ch2 style=\"color: #0055A4;\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0055A4;\"\u003eAllen-Bradley 1746-IM4\u003c\/strong\u003e is a 4-channel Digital AC Input Module for the SLC 500 PLC system. It accepts 170-265V AC signals from field devices such as limit switches, pushbuttons, and proximity sensors. This module mounts directly into the 1746 I\/O chassis, providing reliable AC input monitoring for general-purpose industrial control applications.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #0055A4;\"\u003eCore Functionality\u003c\/h2\u003e\n\u003cp\u003eThe 1746-IM4 converts 200-240V AC field signals into logic-level inputs for the SLC 500 processor. Each of the four input channels features a nominal input current of 12mA at 240V AC. Signal delay times are 35ms for ON transitions and 45ms for OFF transitions. Off-state leakage current is limited to 2.0mA maximum, preventing false triggering. Circuit isolation is tested at 1500V AC between the backplane and I\/O, protecting the control system from field-side faults.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #0055A4;\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; font-size:14px;\"\u003e\n  \u003ctr style=\"background:#f2f2f2;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eValue\u003c\/strong\u003e\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003ePart Number\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e1746-IM4\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eSeries\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eSLC 500\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eModule Type\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eDigital AC Input Module\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eInputs\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e4\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eVoltage Range\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e170-265V AC (47-63 Hz)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eNominal Input Current\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e12mA @ 240V AC\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eBackplane Current (5V DC)\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e35 mA\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eBackplane Current (24V DC)\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e0 A\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eON Signal Delay\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e35 ms (max)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eOFF Signal Delay\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e45 ms (max)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eOff-State Leakage Current\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e2.0 mA (max)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eOff-State Voltage Loss\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e50V AC (max)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eSurge Current per Point\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e1.6A (500µs duration)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003ePower Dissipation\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e1.6W\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eIsolation (Backplane to I\/O)\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e1500V AC\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eWeight\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eApprox. 0.32 kg (0.7 lbs)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eOperating Temperature\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e0°C to 60°C (32°F to 140°F)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eStorage Temperature\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e-40°C to 85°C (-40°F to 185°F)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eHumidity\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e5-95% (non-condensing)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eShock Rating\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e30G\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eVibration Rating\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e2.5G (57-500 Hz)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eCertifications\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eUL-A196, CSA, C-UL (hazardous locations)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eNoise Immunity\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eNEMA ICS 2-230\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2 style=\"color: #0055A4;\"\u003eInstallation Guide\u003c\/h2\u003e\n\u003cp\u003eInstall the 1746-IM4 in any available slot of the SLC 500 1746 I\/O chassis. Ensure the chassis is powered off before insertion. Align the module with the card guides and push firmly until the connector seats fully with the backplane. Secure the module with the retaining screw. Connect field wiring using 1746-HT or 1746-HCA I\/O connection cables. Observe polarity: AC inputs are not polarity-sensitive but maintain consistent wiring practices for troubleshooting.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #0055A4;\"\u003eEngineering Advantages\u003c\/h2\u003e\n\u003cp\u003eThe 1746-IM4 provides reliable AC input monitoring with 1500V AC isolation, protecting the SLC 500 backplane from field-side transients. The 35ms ON and 45ms OFF delays filter contact bounce and electrical noise, ensuring stable input states. Off-state leakage current of just 2.0mA prevents false triggering from residual current in long cable runs. The module is rated for 30G shock and 2.5G vibration, making it suitable for heavy machinery environments. UL and CSA certifications allow installation in hazardous locations. The lightweight design at approximately 0.32 kg (0.7 lbs) simplifies installation and reduces chassis loading.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #0055A4;\"\u003eTechnical FAQs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: Can the 1746-IM4 accept 120V AC inputs?\u003c\/strong\u003e\u003cbr\u003e\nA1: No. The 1746-IM4 is designed for 170-265V AC (200-240V AC nominal). For 120V AC inputs, use the 1746-IA4 or 1746-IA8 module instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: What is the purpose of the 35ms ON delay?\u003c\/strong\u003e\u003cbr\u003e\nA2: The ON delay filters electrical noise and contact bounce from mechanical switches, preventing false transitions and ensuring stable processor input states.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: Is the 1746-IM4 compatible with 1746 chassis of any series?\u003c\/strong\u003e\u003cbr\u003e\nA3: Yes. The 1746-IM4 works with all SLC 500 1746-series chassis, including the 1746-A4, A7, A10, and A13 models.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52642861613188,"sku":"1746-IM4","price":168.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/7454\/7844\/files\/1746-IM4.jpg?v=1787316116","url":"https:\/\/www.etowonauto.com\/pl\/products\/allen-bradley-1746-im4-slc-500-4-point-ac-input-module-240v","provider":"Etowon Auto","version":"1.0","type":"link"}