产品名称：77 系列电气转换器Current-to-Pneumatic Transducers

Surface Mounting：Two 1/4 x 20 x 5/16" deep blind tapped holes
Enclosure：NEMA 3R
                NEMA 4 via conduit vent
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.

Performance Specifications：
Calibration Accuracy： ±0.25% of span
Reproducibility： 0.2% of span
Response Level： 0.025% of span


Specifications – Series 771
Functional Specifications
Supply Pressure：20 psig (35 psig for 771-8_ _ _)
Input/Output Data：See Model Selection
Zero Offset Adjustment：+40% and –20% of span
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：-40 to 180°F (-40 to 82°C)
Electrical Connections
Enclosed terminal block, 1/2" threaded
Enclosed
NEMA 3R
NEMA 4 via conduit vent
Electrical Classification
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.
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
Reproducibility：0.2% of span
Response Level：0.025% of span