{"product_id":"invensys-triconex-3505e-32-ch-digital-input-24vdc-tmr","title":"Invensys Triconex 3505E 32-Ch Digital Input 24VDC TMR","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e3505E\u003c\/strong\u003e is a \u003cstrong\u003e32-channel digital input module\u003c\/strong\u003e manufactured by \u003cstrong\u003eInvensys Triconex\u003c\/strong\u003e for the \u003cstrong\u003eTricon safety instrumented system (SIS)\u003c\/strong\u003e. Designed with \u003cstrong\u003eTriple Modular Redundancy (TMR)\u003c\/strong\u003e architecture, it acquires discrete signals from field switches, proximity sensors, and safety interlocks at \u003cstrong\u003e24 VDC nominal voltage\u003c\/strong\u003e. The module delivers high-density input capacity with \u003cstrong\u003e1500 V AC isolation\u003c\/strong\u003e between field channels and logic circuitry, ensuring reliable signal detection for emergency shutdown (ESD) and fire \u0026amp; gas (F\u0026amp;G) applications.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Invensys Triconex Tricon SIS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e TMR Digital Input Module\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChannels:\u003c\/strong\u003e 32 digital inputs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Input Voltage:\u003c\/strong\u003e 24 VDC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Voltage Range:\u003c\/strong\u003e 20–28 V AC\/DC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Current:\u003c\/strong\u003e 6 mA typical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e 4 kΩ typical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIsolation Voltage:\u003c\/strong\u003e 1500 V AC (channel to logic)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Signal Delay:\u003c\/strong\u003e 4 ms\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -40°C to +70°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStorage Temperature:\u003c\/strong\u003e -40°C to +85°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHumidity:\u003c\/strong\u003e 5% to 95% RH, non-condensing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 10.2 × 6.3 × 3.1 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.2 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFeatures \u0026amp; Benefits\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTMR Fault Tolerance:\u003c\/strong\u003e Triple Modular Redundancy ensures continuous operation with correct output even if one channel fails, eliminating single points of failure.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Channel Density:\u003c\/strong\u003e 32 inputs in a single slot optimize rack space and reduce per-point hardware costs in large safety systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRobust Isolation:\u003c\/strong\u003e 1500 V AC galvanic isolation protects sensitive TMR logic from field-side transients and ground faults.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Range:\u003c\/strong\u003e 20–28 V AC\/DC input range accommodates plant voltage variations and battery-backed UPS systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Response:\u003c\/strong\u003e 4 ms input delay provides rapid safety interlock detection for emergency shutdown applications.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between 3505E and 3503E?\u003c\/strong\u003e\u003cbr\u003eA: The \u003cstrong\u003e3505E\u003c\/strong\u003e is a \u003cstrong\u003e32-channel 24 VDC\u003c\/strong\u003e digital input module. The \u003cstrong\u003e3503E\u003c\/strong\u003e is a \u003cstrong\u003e24 VAC\/VDC\u003c\/strong\u003e digital input module with different voltage thresholds. Both use TMR architecture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the 3505E support dry contact inputs?\u003c\/strong\u003e\u003cbr\u003eA: The module is designed for \u003cstrong\u003e24 VDC wet contact inputs\u003c\/strong\u003e. For dry contact applications, external pull-up resistors or wetting voltage sources are required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the 3505E be used in non-safety PLC applications?\u003c\/strong\u003e\u003cbr\u003eA\u0026gt; While electrically compatible with standard 24 VDC inputs, the 3505E is optimized for \u003cstrong\u003eSIL-rated Tricon safety systems\u003c\/strong\u003e. For non-safety PLC applications, standard Allen-Bradley or Siemens input modules may be more cost-effective.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eInstall the module into a \u003cstrong\u003eTricon chassis slot\u003c\/strong\u003e designated for digital input modules.\u003c\/li\u003e\n  \u003cli\u003eConnect \u003cstrong\u003e24 VDC field power\u003c\/strong\u003e to the external termination panel (ETP) or direct wiring terminal.\u003c\/li\u003e\n  \u003cli\u003eWire each input channel to the corresponding \u003cstrong\u003efield device contact\u003c\/strong\u003e (switch, relay, or sensor output).\u003c\/li\u003e\n  \u003cli\u003eVerify \u003cstrong\u003eETP fuse ratings\u003c\/strong\u003e match the module's input current requirements.\u003c\/li\u003e\n  \u003cli\u003eCheck each channel's \u003cstrong\u003eON\/OFF status LED\u003c\/strong\u003e against field device state during commissioning.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSelection Tips\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Count:\u003c\/strong\u003e The 3505E provides 32 inputs. For lower density requirements, consider 16-channel Tricon DI modules.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Standard:\u003c\/strong\u003e Confirm your plant safety loop voltage is 24 VDC. For 115 VAC or 48 VDC applications, select 3501E or 3502E respectively.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eETP Matching:\u003c\/strong\u003e The 3505E requires a compatible external termination panel. Verify ETP part number and cable assembly compatibility with your Tricon chassis generation.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Triconex","offers":[{"title":"Default Title","offer_id":53993631842488,"sku":"3505E","price":197.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/3505E_2_r270_dfa41f3b-9f6a-4654-b641-46a75d4bed9c.png?v=1787815139","url":"https:\/\/www.globalpetroparts.com\/products\/invensys-triconex-3505e-32-ch-digital-input-24vdc-tmr","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}