{"product_id":"allen-bradley-1746-ow4-slc-500-relay-contact-output-module","title":"Allen-Bradley 1746-OW4 SLC 500 Relay Contact Output Module","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1746-OW4\u003c\/strong\u003e is a 4-channel digital relay contact output module designed for use within the SLC 500 programmable logic controller system architecture. Installed directly into an SLC 500 chassis slot, this module provides electro-mechanical relay switching to interface low-voltage control logic with higher-voltage field devices, supporting load switching across broad AC and DC operating ranges.\u003c\/p\u003e\n\u003ch3\u003eOutput Switching and Contact Configuration\u003c\/h3\u003e\n\u003cp\u003eThe module features 4 normally-open (N.O.) relay outputs grouped with a single common connection. Each output point operates across continuous voltage ranges of 5 to 265 VAC (47–63 Hz) or 5 to 125 VDC, making it suitable for mixed-voltage control loops without requiring interposing relays. The contacts support up to 1.5 A per point at 120 VAC or 1.2 A per point at 24 VDC, with a total maximum continuous current rating of 8 A per module.\u003c\/p\u003e\n\u003ch3\u003eBackplane Power and Operating Dynamics\u003c\/h3\u003e\n\u003cp\u003eOperating power for the internal coil drive circuits is drawn directly from the SLC 500 chassis backplane. The module consumes 45 mA at 5 VDC and 45 mA at 24 VDC from the backplane supply. Internal relay actuation introduces a maximum signal delay of 10.0 ms for both turn-on (ON) and turn-off (OFF) operations under resistive load conditions. Heat dissipation is minimal, maintaining a maximum thermal dissipation rating of 1.9 W overall.\u003c\/p\u003e\n\u003ch3\u003eTechnical 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\u003e1746-OW4\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\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eDigital Relay Contact Output Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Outputs\u003c\/td\u003e\n\u003ctd\u003e4 Normally Open (N.O.) relay contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAC Operating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e5 to 265 VAC (47 to 63 Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC Operating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e5 to 125 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Continuous Current per Point\u003c\/td\u003e\n\u003ctd\u003e1.5 A at 120 VAC \/ 1.2 A at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Continuous Current per Module\u003c\/td\u003e\n\u003ctd\u003e8.0 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Load Current\u003c\/td\u003e\n\u003ctd\u003e1 mA at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Consumption\u003c\/td\u003e\n\u003ctd\u003e45 mA at 5 VDC \/ 45 mA at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Delay (Resistive Load)\u003c\/td\u003e\n\u003ctd\u003eMax 10.0 ms ON \/ Max 10.0 ms OFF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003eMax 1.9 W (0.133 W per point)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003eFrequently Asked Questions\u003c\/p\u003e\n\u003cp\u003eQ: Can the 1746-OW4 output contacts switch both AC and DC loads simultaneously? A: Yes, the dry relay contacts act as isolated mechanical switches capable of handling operating voltages from 5 to 265 VAC or 5 to 125 VDC across the terminal block.\u003c\/p\u003e\n\u003cp\u003eQ: What power source is needed to actuate the internal relay coils of the 1746-OW4 module? A: The module receives its logic power and coil activation current directly from the SLC 500 backplane, drawing 45 mA at 5 VDC and 45 mA at 24 VDC.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":67091991724147,"sku":"1746-OW4","price":233.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/1746-OW8A_3.jpg?v=1761811665","url":"https:\/\/www.dcssupplier.com\/products\/allen-bradley-1746-ow4-slc-500-relay-contact-output-module","provider":"DcsSupplier Limited","version":"1.0","type":"link"}