用于內(nèi)在安全應(yīng)用。該設(shè)備在a危險區(qū)域。它將模擬輸入信號以an的形式傳輸?shù)桨踩珔^(qū)域孤立的當(dāng)前值。的輸入信號上可以疊加數(shù)字信號危險或安全區(qū)域,并雙向轉(zhuǎn)移。如果環(huán)路中的HART通信電阻過低,終端之間的內(nèi)部阻力250Ω8、9可以用11 12。測試HART通信器連接的套接字為集成到設(shè)備的終端。
• Foxboro
技術(shù)參數(shù)
General specifications
Signal type Analog input
Supply
Connection Power Rail or terminals 14+, 15-
Rated voltage Un 20 ... 35 V DC
Ripple within the supply tolerance
Power loss 1.8 W
Power consumption ≤ 2.7 W
Input
Connection terminals 1+, 3-; 4+, 6-
Input signal 0/4 ... 20 mA
Available voltage ≥ 16 V at 20 mA, terminals 1+, 3
Output
Connection terminals 7-, 8+; 10-, 11+
Load 0 ... 550 Ω
Output signal 0/4 ... 20 mA (overload > 25 mA)
Ripple ≤ 50 μA rms
Transfer characteristics
Deviation at 20 °C (68 °F), 0/4 ... 20 mA
≤ 10 μA incl. calibration, linearity, hysteresis, loads and fluctuations of supply voltage
Influence of ambient temperature 0.25 μA/K
Frequency range field side into the control side: band width with 1 Vpp signal 0 ... 7.5 kHz (-3 dB)
safe area to hazardous area: band width with 1 VSS signal 0.3 ... 7.5 kHz (-3 dB)
Settling time 200 μs
Rise time/fall time 20 μs
Electrical isolation
Output/power supply functional insulation, rated insulation voltage 50 V AC
Output/Output functional insulation, rated insulation voltage 50 V AC