{"product_id":"allen-bradley-1746-in16-slc-500-digital-input-module","title":"Allen-Bradley 1746-IN16 SLC 500 Digital Input Module","description":"\u003cp\u003eThe \u003cstrong\u003e1746-IN16\u003c\/strong\u003e is a 16-channel discrete digital input module manufactured by Allen-Bradley for the SLC 500 programmable logic controller system. Operating with a nominal rating of 24 VAC\/VDC (sinking configuration), it converts field control signals into logic levels across the SLC 500 backplane. The module mounts into a single slot of any standard 1746 chassis and features channel-level LED status indicators for real-time visual signal verification.\u003c\/p\u003e\n\u003ch3\u003eInput Channel Configuration and Voltage Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe module accepts 16 discrete input channels operating over an expanded voltage range of 10-30 VAC\/VDC. Designed as a sinking module, it receives current from sourcing field devices. Each channel draws a nominal input current of 8 mA at 24 V, with an off-state leakage current limit of 1 mA, rendering it compatible with proximity switches, pushbuttons, and industrial relay contacts.\u003c\/p\u003e\n\u003ch3\u003eResponse Timing and Thermal Ratings\u003c\/h3\u003e\n\u003cp\u003eSignal filtering produces distinct propagation delays based on the field signal type. For DC control signals, signal delay for both ON-to-OFF and OFF-to-ON transitions is 15 ms, whereas AC control signals exhibit a 25 ms delay. The module consumes 0.085 A from the 5 VDC backplane bus, with a minimum power dissipation of 0.425 W and a maximum total module power dissipation of 6 W (0.35 W per point).\u003c\/p\u003e\n\u003ch3\u003eChassis Integration and Wiring Accessories\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1746-IN16\u003c\/strong\u003e plugs directly into any available slot of an SLC 500 local or expansion rack (1746-A4, A7, A10, or A13). Field connections are routed through compatible terminal blocks, including the 1746-HT or pre-wired 1746-HCA wiring assemblies, allowing module removal without disconnecting individual field conductors.\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1746-IN16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eDigital Input Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Platform\u003c\/td\u003e\n\u003ctd\u003eSLC 500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e16 channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Circuit Type\u003c\/td\u003e\n\u003ctd\u003eSinking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VAC \/ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10-30 VAC \/ VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Input Current\u003c\/td\u003e\n\u003ctd\u003e8 mA @ 24 VAC \/ VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-State Current\u003c\/td\u003e\n\u003ctd\u003e1 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Delay (DC)\u003c\/td\u003e\n\u003ctd\u003e15 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Delay (AC)\u003c\/td\u003e\n\u003ctd\u003e25 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5 VDC)\u003c\/td\u003e\n\u003ctd\u003e0.085 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Module Power Dissipation\u003c\/td\u003e\n\u003ctd\u003e6 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Wiring Connectors\u003c\/td\u003e\n\u003ctd\u003e1746-HT, 1746-HCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.37 kg (0.81 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1746-IN16 accept both AC and DC input signals on the same system? A: Yes, the module supports an operating voltage range of 10-30 VAC\/VDC across its sinking input channels, though input propagation delay differs between AC (25 ms) and DC (15 ms) signals.\u003c\/p\u003e\n\u003cp\u003eQ: How much current does the 1746-IN16 draw from the SLC 500 backplane? A: The module draws 0.085 A (85 mA) from the 5 VDC backplane bus.\u003c\/p\u003e\n\u003cp\u003eQ: Does replacing a 1746-IN16 require disconnecting individual field wiring leads? A: No, when paired with removable terminal blocks such as the 1746-HT or pre-wired cable connectors like the 1746-HCA, the terminal block can be detached to replace the module while preserving field wiring.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":67167115313267,"sku":"1746-IN16","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/1746-OBP82_Cocoai_09c4ebd8-e66a-4ab5-a443-c24885705022.jpg?v=1794380316","url":"https:\/\/www.dcssupplier.com\/products\/allen-bradley-1746-in16-slc-500-digital-input-module","provider":"DcsSupplier Limited","version":"1.0","type":"link"}