{"product_id":"1756-a7-new-in-stock-1756a7-ab-ser-c-controllogix-7-slots-chassis","title":"1756-A7 New In Stock 1756A7 Ser C ControlLogix 7 Slots Chassis","description":"\u003ch2 id=\"p3\"\u003e1756-A7 — 1756 Seven-Slot Logix Chassis\u003c\/h2\u003e\n\u003cp\u003eThe 1756-A7 is a 7-slot chassis for the 1756 Logix modular control system. It provides the physical housing and backplane that connects the power supply, processor, communication modules, and I\/O modules in a 1756 system. The chassis itself contains no processing logic — it is the structural and electrical backbone that all 1756 modules plug into. Seven slots accommodate a processor in Slot 0 and up to six modules in Slots 1–6, making it suitable for small-to-medium controller builds that don't require the larger 10, 13, or 17-slot chassis.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1756-A7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlatform\u003c\/td\u003e\n\u003ctd\u003e1756 Logix modular system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Slots\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUser Module Slots\u003c\/td\u003e\n\u003ctd\u003e6 (Slot 0 = processor; Slots 1–6 = I\/O \/ comm modules)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane\u003c\/td\u003e\n\u003ctd\u003e1756 series parallel backplane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply Slot\u003c\/td\u003e\n\u003ctd\u003eLeft end (dedicated, outside the 7-slot count)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Compatibility\u003c\/td\u003e\n\u003ctd\u003eAll 1756-series I\/O, communication, and specialty modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003ePanel surface or DIN rail adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure\u003c\/td\u003e\n\u003ctd\u003eOpen chassis (requires panel enclosure)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0°C to 60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eUL 508, CE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eBackplane Power Budget\u003c\/h3\u003e\n\u003cp\u003eThe 1756 power supply module (selected separately) provides both 5V DC and 24V DC to the backplane. Each module installed in the chassis draws a defined amount of current from each rail — these values are listed in each module's specifications. The sum of all modules' 5V draw must not exceed the power supply's 5V capacity, and similarly for the 24V rail.\u003c\/p\u003e\n\u003cp\u003eBefore finalizing a chassis build, add up the backplane current draws for all planned modules and compare against the chosen power supply's ratings. Common misses: EtherNet\/IP communication modules draw significantly more 5V current than simple I\/O modules; multiple high-density output modules switching simultaneously can draw more 24V rail current than expected. The 1756-PA75 (75W AC) and 1756-PB75 (75W DC) are the standard power supplies for the 7-slot chassis — verify the total current demand fits within their rated output.\u003c\/p\u003e\n\u003cdiv class=\"callout\"\u003eThe power supply module for the 1756-A7 is ordered separately — it does not ship with the chassis. The 1756-PA75R (AC) or 1756-PB75R (DC) redundant variants can also be used when supply redundancy is required. Verify the power supply catalog number matches the available panel supply voltage (AC or DC) before ordering.\u003c\/div\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp class=\"faq-q\"\u003e\u003cstrong\u003eQ: Can the 1756-A7 be used in a remote chassis configuration over EtherNet\/IP?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eYes. Install a 1756-EN2T or 1756-EN4TR communication module in the chassis and configure it as a remote I\/O chassis in Studio 5000. The processor in the remote chassis can be a communication bridge module (not a full processor) if no local processing is needed — the remote chassis then functions purely as an I\/O expansion rack.\u003c\/p\u003e\n\u003cp class=\"faq-q\"\u003e\u003cstrong\u003eQ: Is the power supply slot included in the 7-slot count?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eNo. The power supply occupies a dedicated slot at the left end of the chassis that is not counted in the 7 module slots. All 7 slots are available for the processor and other modules.\u003c\/p\u003e\n\u003cp class=\"faq-q\"\u003e\u003cstrong\u003eQ: Can I\/O modules be hot-swapped in the 1756-A7?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eYes, in systems configured for module hot-swap. The 1756 chassis and 1756-L7x\/L8x processors support module removal and insertion under power. Verify the controller's I\/O module configuration and the machine's interlocks permit a safe swap before removing a module from a running system.\u003c\/p\u003e\n\u003cp class=\"faq-q\"\u003e\u003cstrong\u003eQ: What is the difference between the 1756-A7 and the 1756-A7K?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eThe 1756-A7K is a conformal-coated variant for installations in environments with humidity, condensation, or mild chemical exposure that would degrade an uncoated chassis. Mechanically and electrically identical — the conformal coating is the only difference. Use the K variant where IPC-CC-830B conformal coating is required by the installation specification.\u003c\/p\u003e","brand":"topsdevice","offers":[{"title":"Default Title","offer_id":42733765001277,"sku":null,"price":254.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/6516\/8701\/files\/1756-A7_4_582a7457-35b0-4f84-b55b-03e7f1fd17d3.jpg?v=1769223518","url":"https:\/\/topsdevice.com\/products\/1756-a7-new-in-stock-1756a7-ab-ser-c-controllogix-7-slots-chassis","provider":"topsdevice","version":"1.0","type":"link"}