857-421 JUMPFLEX Signal Conditioners Repeater Power Supply, HART USensor+ 1 5 OUT + OUT IN 2 6 GND 2 IN GND 1 3 7 Us+ POWER GND 1 4 8 GND 3 > < 94 mm/3.68 in > 6 mm/0.23 in Short description: Pack. Item No. Description The 857-421 HART Repeater Power Supply links SMART transmitters located Unit in the field. It provides the power required and transmits the analog signals in JUMPFLEX Signal Conditioner, for DIN 35 rail 857-421 1 an electrically isolated way. Repeater power supply, HART Characteristics: HART communication Power supply to SMART transmitters Safe 3-way isolation with 2.5kV test voltage to EN 61140 Technical Data Technical Data Input: Environmental requirements: Input signal 4 ... 20 mA Ambient operating temperature -25 C ... +70 C Input resistance 50 Storage temperature -40 C ... +85 C Transmitter supply V = 18 V at 30 mA Safety and protection: v Max. input current Max. supply Test voltage (input/output/supply) 2.5 kV AC, 50 Hz, 1 min Output: Connection and type of mounting: Output signal 4 ... 20 mA Wire connection Push-in CAGE CLAMP Load impedance 230 - 600 Cross sections solid: Offset < 20 A 0.08 mm ... 2.5 mm / AWG 28 ... 14 Residual ripple < 10mV eff fine-stranded: General specifications: 0.34 mm ... 2.5 mm / AWG 22 ... 14 Nominal supply voltage V 24 VDC Strip lengths 9 ... 10 mm / 0.35 0.39 in S Supply voltage range V -30 % +30 % Dimensions and weight: S Current consumption at 24 VDC 45 mA Dimensions (mm) W x H x L 6 x 96 x 94 Max. operating frequency 100 Hz signal / 2.5 kHz HART Height from upper-edge of DIN 35 rail Response time (T ) < 3.5 ms signal Weight 47.8 g 10-90 Transmission error 0.1 % of the full scale value Standards and approvals: Temperature coefficient 0.01 % /K Conformity marking 1 r UL 508 r ANSI/ISA 12.12.01 Class I, Div. 2, Grp. ABCD, T4 Accessories see pages 226 236 WAGO Kontakttechnik GmbH & Co. KG Postfach 2880 - D-32385 Minden Tel.: +49(0)571/887-0 E-Mail: info wago.com Subject to design changes 0 8.07.2015 Hansastr. 27 - D-32423 Minden Fax: +49(0)571/887-169 www.wago.com < 96 mm/3.76 in > >Simultaneous transmission of analog and digital signals 857-421 mA 20 HART - signal (digital) analog signal 4 t Connection assignment 857-421 IN OUT Transmitter passive Cong +Us 1 1 +Us 1 5 + + Transmitter active U/I + 2 OUT 2 2 +IN 2 2-wire 3 GND 3 GND 3 6 3-wire 24 V DC = = POWER 24 V DC 7+ 8 =