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<strong>FLEX</strong> I/O <strong>and</strong> <strong>FLEX</strong> <strong>Integra</strong> Product Data 24V dc 2 Input Frequency Module Cat. No. 1794-IJ2 137Type ofInputsFrequency24V dcIEC1+Proximity 1,2Channel 0 Terminals 5 Channel 1 Terminals 5Power Input RET 6 Power Input RET 6 GND 5A-7 A-6 A-3 A-8 A-9 A-1224V dc A-7 A-6 A-3 A-8 A-9 A-12Switch 3Contact500mV acMagneticPickupA-7 A-5 A-3 A-8 A-10 A-1250mV ac A-7 A-5 A-3 A-8 A-10 A-12Pickup 4Magnetic6V acVortex3V acVortexA-2 A-1 A-3 A-13 A-14 A-12A-2 A-0 A-3 A-13 A-15 A-121 As defined by st<strong>and</strong>ard IEC 1131-2.2 RET not used on 2-wire devices.3Add external resistor from 24V to F or G for wire-off detection (0.4mA).4Add a jumper between 50mV <strong>and</strong> RET (Frequency - channel 0=4 to 3; channel 1=11 to12). (Gate - channel 0=21 to 20; channel 1=28 to 29).5Connect cable shields to GND terminals.6 All 4 RET terminals (ch 0 <strong>and</strong> 1, Freq, Gate) are internally connected together.Type ofInputsGate24V dcIEC1+Proximity 1,2Channel 0 Terminals 5 Channel 1 Terminals 5Power Input RET 6 Power Input RET 6 GND 5B-24 B-23 B-20 B-25 B-26 B-2924V dc B-24 B-23 B-20 B-25 B-26 B-29Switch 3Contact500mV acMagneticPickupB-24 B-22 B-20 B-25 B-27 B-2950mV ac B-24 B-22 B-20 B-25 B-27 B-29Pickup 4Magnetic1 As defined by st<strong>and</strong>ard IEC 1131-2.2RET not used on 2-wire devices.3 Add external resistor from 24V to F or G for wire-off detection (0.4mA).4 Add a jumper between 50mV <strong>and</strong> RET (Frequency - channel 0=4 to 3; channel 1=11 to12). (Gate - channel 0=21 to 20; channel 1=28 to 29).5 Connect cable shields to GND terminals.6 All 4 RET terminals (ch 0 <strong>and</strong> 1, Freq, Gate) are internally connected together.Output AlarmConnectionsChannel 0 Terminals 1 Channel 1 Terminals 1Sply+SplyRETOut+OutRETSply+SplyRETOut+OutRETSupply Connection C-37 C-39 C-46 C-48Output Connection B-17 B-18 B-31 B-321 Connect cable shields to GND connections.Specifications - 1794-IJ2Module LocationCat. No. 1794-TB3G or -TB3GS Terminal Base UnitIsolation Voltage1250 Vrms/V ac between user input (F & G) <strong>and</strong>system, user output (0 & 1) <strong>and</strong> system, <strong>and</strong> userpower <strong>and</strong> system100% tested at 2121V dc for 1s500 Vrms/V ac between 4 user inputs <strong>and</strong> 2 useroutputs, user output 0 <strong>and</strong> output 1100% tested at 850V dc for 1sProcessing Time≤4msFlexbus Current30mA @ 5V dcPower Dissipation4.6W maximum @ 31.2V dcThermal Dissipation Maximum 15.6 BTU/hr @ 31.2V dcIndicators (Field-Side Driven, 1 green/red power/status indicatorLogic-Side Indication) Input:4 yellow status indicators (0, 1) - logic side4 red wire-off indicators (F) - logic sideOutput:2 yellow status indicators (0, 1) - logic sideKeyswitch Position 1Input SpecificationsNumber of Input Channels 2Number of Inputsper ChannelInput Frequency (max)2 - Frequency <strong>and</strong> Gate (gate used to establishdirection)1-32Kz w/sine wave; 1-32KHz w/square waveinput32,767 or 3,276.7 (dependent on range)Frequency Value (max)Input Pulse Width (min) 20µsResolution/Accuracy Refer to resolution/accuracy tableOn-State Voltage (min)On-State Voltage (nominal)(selected by terminal baseconnections)On-State Voltage (max)On-State CurrentMinimumNominalMaximumOff-State Voltage (max)Off-State Current (min)Wire-Off Detection10V (24V IEC+1 proximity, encoder input or switchinputs)50mV ac, 28V ac peak - Extended Magnetic Pickup500mV ac, 28V ac peak - Magnetic Pickup≤3V - vortex flowmeter low range≥6V - vortex flowmeter high range24V dc IEC1+ proximity or encoder input24V dc contact switch inputLimited to isolated 24V dc power supply2.0mA9.0mA10.0mA5.0V dc on 24V dc IEC1+ Terminal1.5mA into 24V dc IEC1+ Terminal0.4mA for proximity, encoder, or contact switchwith 50kΩ shunt resistorPublication 1794-2.1 - January 2000
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