{"product_id":"allen-bradley-1734-485asc-rs485-communication-module-24vdc","title":"Allen-Bradley 1734-485ASC RS485 Communication Module 24VDC","description":"\u003ch2 style=\"color: #0056b3; font-size: 1.5em;\"\u003eAllen-Bradley 1734-485ASC POINT I\/O Serial Interface Module\u003c\/h2\u003e\n\u003cp style=\"font-size: 1.05em; line-height: 1.6;\"\u003eThe \u003cb style=\"color: #0056b3;\"\u003eAllen-Bradley 1734-485ASC\u003c\/b\u003e is a POINT I\/O serial interface module supporting RS-485 and RS-422 industrial networks. Designed for connecting ASCII devices, this module provides reliable serial communication in industrial automation systems. Operating on 10-28.8 V DC (nominal 24 V DC), it draws 15 mA supply current. Weighing approximately 0.1 kg (0.22 lbs), it features keyswitch position 2 for wiring base compatibility.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #0056b3; margin-top: 24px;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 0.95em;\"\u003e\n\u003cthead style=\"background-color: #f2f4f6;\"\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ccc; text-align: left;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ccc; text-align: left;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eRockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003ePart Number\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e1734-485ASC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eProduct Family\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e1734 POINT I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eModule Type\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eSerial Interface Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eNetwork Support\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eRS-485 (2-wire) or RS-422 (4-wire)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eKeyswitch Position\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eExternal DC Voltage\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e10-28.8 V DC (Nominal 24 V DC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eSupply Current\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e15 mA @ 24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eApprox. 0.1 kg (0.22 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eUPC\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e10612598283702\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"color: #0056b3; margin-top: 24px;\"\u003eNetwork Wiring \u0026amp; Grounding Guide\u003c\/h3\u003e\n\u003cul style=\"margin-left: 20px; line-height: 1.8;\"\u003e\n\u003cli\u003eUse shielded cables to reduce electrical noise. Ground the shield at one end only (DIN rail side).\u003c\/li\u003e\n\u003cli\u003eChassis ground connection is not available on the 1734-485ASC terminal block. Ground at the DIN rail instead.\u003c\/li\u003e\n\u003cli\u003eFor RS-485: Use 2-wire connection (Data A, Data B) with termination resistors at both ends.\u003c\/li\u003e\n\u003cli\u003eFor RS-422: Use 4-wire connection (TX+, TX-, RX+, RX-) for full-duplex communication.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #0056b3; margin-top: 24px;\"\u003eInstallation \u0026amp; Field Application Guide\u003c\/h3\u003e\n\u003cul style=\"margin-left: 20px; line-height: 1.8;\"\u003e\n\u003cli\u003eMount the module on a compatible wiring base (1734-TB series).\u003c\/li\u003e\n\u003cli\u003eSet keyswitch position to 2 before installation.\u003c\/li\u003e\n\u003cli\u003eConnect RS-485 or RS-422 devices using the appropriate terminal block connections.\u003c\/li\u003e\n\u003cli\u003eConfigure buffer sizes (default 20\/20 bytes) and I\/O message size as required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #0056b3; margin-top: 24px;\"\u003eWhy Choose the 1734-485ASC\u003c\/h3\u003e\n\u003cul style=\"margin-left: 20px; line-height: 1.8;\"\u003e\n\u003cli\u003eSupports both RS-485 and RS-422 networks for flexible integration.\u003c\/li\u003e\n\u003cli\u003eCompact POINT I\/O form factor saves panel space.\u003c\/li\u003e\n\u003cli\u003eDesigned for ASCII device communication in industrial environments.\u003c\/li\u003e\n\u003cli\u003eEasy DIN rail mounting with removable terminal block.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #0056b3; margin-top: 24px;\"\u003eField Engineer FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cb style=\"color: #0056b3;\"\u003eQ1:\u003c\/b\u003e What is the difference between RS-485 and RS-422 support on this module?\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA1:\u003c\/b\u003e The module supports RS-485 (2-wire, half-duplex) and RS-422 (4-wire, full-duplex) networks. Select the appropriate mode based on your device requirements.\u003c\/p\u003e\n\u003cp\u003e\u003cb style=\"color: #0056b3;\"\u003eQ2:\u003c\/b\u003e Where should I ground the cable shield?\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA2:\u003c\/b\u003e Ground the shield at one end only. Connect to the DIN rail (chassis ground) as the terminal block does not provide a ground connection.\u003c\/p\u003e\n\u003cp\u003e\u003cb style=\"color: #0056b3;\"\u003eQ3:\u003c\/b\u003e How do I configure buffer sizes for the module?\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eA3:\u003c\/b\u003e Default buffer sizes are 20 bytes for both transmit and receive. Modify these in the configuration file if more than 20 bytes is required.\u003c\/p\u003e\n\n\u003cp style=\"margin-top: 24px;\"\u003eInquiries: \u003ca style=\"color: #0056b3; text-decoration: none; font-weight: bold;\" href=\"mailto:sale@etowonauto.com\"\u003esale@etowonauto.com\u003c\/a\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52749681000580,"sku":"1734-485ASC","price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/7454\/7844\/files\/1734-485ASC-2.jpg?v=1789907171","url":"https:\/\/www.etowonauto.com\/it\/products\/allen-bradley-1734-485asc-rs485-communication-module-24vdc","provider":"Etowon Auto","version":"1.0","type":"link"}