{"product_id":"allen-bradley-1771-wi-thermocouple-wiring-arm","title":"Allen-Bradley 1771-WI Thermocouple Wiring Arm","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1771-WI\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1771-WI\u003c\/strong\u003e Thermocouple Wiring Arm, operates as a dedicated hardware component for field sensor signal termination and module interface wiring within Allen-Bradley 1771 Universal I\/O chassis 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\u003e1771-WI\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\u003e0.26 lbs (0.12 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 1771 I\/O Arm Form Factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C (32 to 140 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive Component (0 W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Terminals\u003c\/td\u003e\n\u003ctd\u003e18 Screw Terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Type\u003c\/td\u003e\n\u003ctd\u003eScrew Clamp Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eThermocouple \/ Millivolt Signal Interface (1771-IXE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCold Junction Compensation\u003c\/td\u003e\n\u003ctd\u003eSupported via Onboard CJC Sensors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e1771 Universal I\/O Chassis Slot Latch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control Signal Termination \u0026amp; CJC Isolation\u003c\/h3\u003e\n\u003cp\u003eThe 1771-WI mounts directly onto the front pivot bar of a 1771-IXE thermocouple input module, facilitating 18-point screw terminal access for field-side thermocouple wire pairs without requiring module removal during maintenance. To maintain high accuracy across millivolt-level temperature signals, the wiring arm incorporates cold junction compensation (CJC) thermistors across its terminal strip. Onboard galvanic isolation and dedicated shield terminals prevent channel-to-channel crosstalk and isolate low-level analog signals from severe industrial electromagnetic interference.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1771-WI wiring arm require external DC power or draw backplane current?\u003c\/p\u003e\n\u003cp\u003eA: No, the 1771-WI is a passive field wiring connector arm. It draws 0 mA from the 1771 backplane bus and requires no external power connections.\u003c\/p\u003e\n\u003cp\u003eQ: Which Allen-Bradley 1771 I\/O module is specifically paired with the 1771-WI wiring arm?\u003c\/p\u003e\n\u003cp\u003eA: The 1771-WI is engineered specifically for use with the 1771-IXE high-resolution thermocouple\/millivolt input module to provide accurate cold junction compensation.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Latching\u003c\/strong\u003e: Engage the lower pivot hooks of the 1771-WI arm onto the 1771 chassis pivot bar, then swing the arm upward until it snaps firmly into the 1771-IXE module faceplate connector.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermocouple Wiring\u003c\/strong\u003e: Connect field thermocouple extension leads directly to the 18 screw terminals using correct polarity. Ensure thermocouple extension wire alloy matches the specific thermocouple type (e.g., Type J, K, T) connected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCJC Sensor Preservation\u003c\/strong\u003e: Avoid touching or modifying the onboard cold junction compensation thermistors embedded near the terminal block, as mechanical stress or contamination alters temperature measurement accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Wire Grounding\u003c\/strong\u003e: Terminate individual thermocouple wire shield drain wires strictly at the designated shield terminals on the wiring arm to prevent high-frequency ground loop currents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrain Relief\u003c\/strong\u003e: Fasten field wire bundles using the bottom cable tie bar to ensure mechanical strain is not transferred directly to the terminal screw clamps.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48770300739774,"sku":"1771-WI","price":95.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/1771-WG_1_942e6bea-39cb-4995-996e-ed4fa8343167.png?v=1787296526","url":"https:\/\/www.autooiltech.com\/products\/allen-bradley-1771-wi-thermocouple-wiring-arm","provider":"AutoOilTech Limited","version":"1.0","type":"link"}