{"product_id":"allen-bradley-1745-e101-expansion-chassis","title":"Allen-Bradley 1745-E101 Expansion Chassis","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1745-E101\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1745-E101\u003c\/strong\u003e PLC Expansion Unit, operates as a dedicated hardware component for localized digital I\/O processing within Allen-Bradley SLC 100 platforms.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\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\u003e1745-E101\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\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e4.00 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard SLC 100 Chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e2.5 A (10-250 VAC, 50\/60 Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Rating\u003c\/td\u003e\n\u003ctd\u003e(10) 115 VAC Digital Inputs (85-132 VAC Range, 50\/60 Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Rating\u003c\/td\u003e\n\u003ctd\u003e(6) Relay Contact Digital Outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunctional Category\u003c\/td\u003e\n\u003ctd\u003eBrick PLC Expansion Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eAllen-Bradley Technical Characteristics\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Bus Communication Velocity\u003c\/strong\u003e: Transfers high-speed input\/output bit states directly to the main processor backplane interface without introducing software cycle execution delays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI\/O Density Scaling\u003c\/strong\u003e: Adds 10 discrete 115 VAC inputs and 6 electromechanical relay outputs to expand field device density within a single rack assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can the 1745-E101 expansion unit be connected to the main processor while supply voltage is active?\u003c\/p\u003e\n\u003cp\u003eA: No. Hot-swapping expansion units or interconnect cables under power can disrupt backplane logic timing and cause CPU bus fault trips.\u003c\/p\u003e\n\u003cp\u003eQ: What is the operating input voltage range for the 115 VAC discrete input channels?\u003c\/p\u003e\n\u003cp\u003eA: The 10 discrete AC inputs accept operational field signal levels between 85 VAC and 132 VAC at 50\/60 Hz.\u003c\/p\u003e\n\u003cp\u003eQ: Does the 1745-E101 supply power to connected external field loads on its relay outputs?\u003c\/p\u003e\n\u003cp\u003eA: No. The relay contact outputs provide dry electromechanical contacts; field power must be supplied through an external circuit fused within the rated load limits.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eDisconnect all primary power sources supplying the SLC 100 main unit and expansion unit before making physical wiring connections or mounting.\u003c\/li\u003e\n\u003cli\u003eSecure the expansion chassis to a grounded metal enclosure panel using standard mounting hardware to ensure proper mechanical and thermal stability.\u003c\/li\u003e\n\u003cli\u003eRoute field input wiring and AC power distribution conductors separately from low-voltage communication cables to prevent electromagnetic noise interference.\u003c\/li\u003e\n\u003cli\u003eMaintain a minimum clearance of 2.0 in (50.8 mm) on all sides of the unit for passive thermal convective cooling.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45338802946163,"sku":"1745-E101","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/screenshot_2026-08-10_14-22-29_1200x1200_86b9e5e4-e37b-420e-8ff3-c4e2a9285185.jpg?v=1786343891","url":"https:\/\/www.dcssupplier.com\/products\/allen-bradley-1745-e101-expansion-chassis","provider":"DcsSupplier Limited","version":"1.0","type":"link"}