Transducers Models 77 and 771 Current-to-Pneumatic Transducers Technical data Surface Mounting Specifications – Series 771 Two 1/4 x 20 x 5/16" deep blind tapped holes Functional Specifications Enclosure Supply Pressure NEMA 3R NEMA 4 via conduit vent 20 psig (35 psig for 771-8_ _ _) Input/Output Data Electrical Classification FM Approved Model 77 Non-incendive for Class I, Div. 2, Groups A, B, C, D. Dust-ignition proof for Class II, Div. 1, Groups E, F, G. Suitable for Class III, Div. 1 hazardous locations and NEMA 4. Model 77XXF Intrinsically safe for Class I/II/III, Div. 1, Groups A, B, C, D, E, F, G and NEMA 4 when used with approved barriers and converters listed on Siemens drawing #15032-7704/7705. See Model Selection Zero Offset Adjustment +40% and –20% of span 3 Output Capacity Standard: 0.16 scfm Boosted: 2.0 scfm Supply Pressure Effect Less than 2% of span (change of output for supply change from 18 to 22 psig) Temperature Range Performance Specifications -40 to 180°F (-40 to 82°C) Calibration Accuracy Electrical Connections ±0.25% of span Enclosed terminal block, 1/2" threaded Reproducibility Enclosed 0.2% of span NEMA 3R NEMA 4 via conduit vent Response Level Electrical Classification 0.025% of span 6 Model Number Current-to-Pneumatic Transducer Exhaust • Atmospheric • Tapped Exhaust Input/Output Input Output Input Range Impedence Range1 (mA dc) (psig) (Ohms) 1 to 5 3 to 15 2450 0 to 4 3 to 15 2450 4 to 20 3 to 27 610 4 to 20 3 to 15 185 10 to 50 3 to 15 30 Intrinsically-Safe Designation • Intrinsically Safe (omit for other classifications) Accessories • Reverse Acting Output FM Approved Series 771_ _ _ F1: Intrinsically safe for Class I/II/III, Div. I, Groups A, B, C, D, E, F, G when used with approved barriers and converters listed on Siemens drawing #15032-7704/7705. Order No. 77■■■■ - ■ ▲▲▲▲ ▲ E Series 771_ _ _ F2: Non-incendive for Class I, Div. 2, Groups, A, B, C, D. Dust-ignition proof for Class II, Div. 1, Groups E, F and G. Suitable for Class III, Div. 1 hazardous locations. Performance Specifications Calibration Accuracy ±1/2% of span standard unit ±1% of span boosted unit 3 3A 8 16 40 Reproducibility 0.2% of span Response Level F 0.025% of span R 1) Other input ranges available; 0 - 3 mA to 0-60 mA, consult factory. 3.13 Transducers Models 77 and 771 Current-to-Pneumatic Transducers Ordering data Order No. Model Number Current-to-Pneumatic Transducer 3 Input/Output Input Output Range1 Range (mA dc) (psig) 1 to 5 3 to 15 4 to 20 3 to 27 4 to 20 3 to 15 10 to 50 3 to 15 Output Capacity • Boosted • Standard Terminal Strip P/N 12330-100 - Wall Mount Bracket 771■■■■ ▲▲▲▲ Input Impedence (Ohms) 2450 610 185 30 3 8 16 40 B S T Electrical Approval • None Required • Intrinsically Safe • Non-incendive Mounting Dimensions – Model 77 3.14 Accessories N F1 F2 P/N 12334-130 - Pipe Mounting Bracket Reverse Acting (not available on the Model 771-8) Increase input; decrease output. Add “R” to model number. Transducers Models 77 and 771 Current-to-Pneumatic Transducers Dimensional drawings Mounting Dimensions – Model 771 S/B 3 3.15