{"product_id":"thermocouple-input-expander-module-allen-bradley-1771-iyc","title":"Thermocouple Input Expander Module | Allen-Bradley 1771-IYC","description":"\u003cp\u003eThe\u003cstrong\u003e1771-IYC\u003c\/strong\u003eis a conformal-coated thermocouple input expander module engineered for the Allen-Bradley PLC-5 system architecture.It expands the temperature sensing capabilities of an associated analog input module by interfacing up to 8 floating differential thermocouple sensors across standard industrial millivolt ranges (+\/- 99. 99 mV). Operating without external power, the module draws 750 mA directly from the 1771 I\/O chassis backplane and uses block transfer programming to pass formatted temperature data to the PLC processor.\u003c\/p\u003e\n\u003ch3\u003eSignal Processing and Temperature Conversion\u003c\/h3\u003e\n\u003cp\u003eThe module supports Type B, E, J, K, R, S, and T thermocouples, converting millivolt signals into a natural binary data format at a resolution of 15 bits plus sign (1. 0 deg C \/ 1. 0 deg F per bit). It features a fast channel update rate of 25 ms across all 8 channels. To maintain measurement accuracy without manual tuning, the unit incorporates automatic calibration for channel offset and gain, alongside continuous open-circuit detection and user-selectable high\/low temperature alarms.\u003c\/p\u003e\n\u003ch3\u003eChassis Installation and Keying\u003c\/h3\u003e\n\u003cp\u003eOccupying a single slot in any standard 1771 I\/O chassis, the module requires chassis keying bands positioned between pins 20–22 and pins 24–26 to ensure proper slot alignment. Field wiring connects via a removable 1771-WI (or 1771-WH) wiring arm, enabling module replacement without disturbing individual field sensor leads. The module undergoes self-diagnostics at power-up to report hardware status to the main processor.\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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-IYC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley (Rockwell Automation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eThermocouple Input Expander Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Platform\u003c\/td\u003e\n\u003ctd\u003ePLC-5 \/ 1771 I\/O System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Inputs\u003c\/td\u003e\n\u003ctd\u003e8 Floating Differential\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Thermocouple Types\u003c\/td\u003e\n\u003ctd\u003eType B, E, J, K, R, S, T (+\/- 99.99 mV)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Format\u003c\/td\u003e\n\u003ctd\u003eNatural Binary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e15 bits + sign (1.0 deg C \/ 1.0 deg F per bit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Update Rate\u003c\/td\u003e\n\u003ctd\u003e25 ms for 8 channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e750 mA at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal Power Requirement\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Power Dissipation\u003c\/td\u003e\n\u003ctd\u003e4.25 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Thermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e14.5 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 55 degrees C (32 to 131 degrees F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e5 to 95% noncondensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Shock\u003c\/td\u003e\n\u003ctd\u003e30 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtective Coating\u003c\/td\u003e\n\u003ctd\u003eConformal Coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Wiring Arm\u003c\/td\u003e\n\u003ctd\u003e1771-WI \/ 1771-WH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.56 lbs (0.71 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the 1771-IYC handle channel calibration for individual thermocouple inputs? A: The module automatically calibrates both offset and gain for every channel, eliminating the need for manual potentiometer adjustments during commissioning or routine maintenance.\u003c\/p\u003e\n\u003cp\u003eQ: What keying band positions are required for installing the 1771-IYC into a 1771 I\/O chassis? A: Keying bands must be installed on the chassis backplane connector between pins 20 and 22,and between pins 24 and 26,to prevent accidental insertion of incorrect module types.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":67124418510963,"sku":"1771-IYC","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/1771-IM_Cocoai_efcad4a4-ddca-4337-bd83-8666bef32c24.jpg?v=1793947428","url":"https:\/\/www.dcssupplier.com\/products\/thermocouple-input-expander-module-allen-bradley-1771-iyc","provider":"DcsSupplier Limited","version":"1.0","type":"link"}