Loop power supply with optional HART® diagnostics
RN221N
E-direct infolinka
+420 241 080 470
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Loop power supply, wide range power supply, flexible power source
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Bi-directional HART® transmission with SMART transmitters
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Optional HART® diagnostics
Specs at a glance
Approval ATEX II (1) GD [EEx ia] IIC HART® signal Bidirectional Diagnostics Via HART® status bit or NE43 Relay output Optional for HART® diagnostics Product / Version Price / pcs. in CZK Order code Power Supply; Diagnostics Approval 1 to 3 4 to 10 11+ Standard Non-hazardous area 3.859,- 3.589,- 3.396,- RN221N-A1 ATEX II (1)GD (Ex ia) IIC 4.145,- 3.855,- 3.648,- RN221N-B1 With Hart® diagnostic relay Non-hazardous area 6.142,- 5.712,- 5.405,- RN221N-A3 ATEX II (1)GD (Ex ia) IIC 6.428,- 5.978,- 5.656,- RN221N-B3 Accessory
Product / Version Price / pcs. in CZK Order code Housing Field, R4 182x180x165, 5xM20, PC Protection housing Minitec. Synthetic housing with transparent cover. Protection IP66. 4x22.5mm / 2x45mm. Usage: FTL825. 2.196,34 52010132 Prices valid until 30.09.2020 in CZK per unit (not including shipping and applicable sales tax). See
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Application
The RN221N power supply is used for the galvanic isolation of 4 to 20 mA signal current circuits. It can also be applied for the intrinsically safe operation of 2-wire transmitters and to remove earth loops. The unit offers a sensor monitoring function as an option which monitors the HART® signal or the current loop for faults. The status of the measuring point is reported over an alarm relay.
Function
The RN221N active barrier supplies sensors with auxiliary energy and transmits the measuring signal to the output. The optional, intrinsically safe input circuit, conforms to the requirements for ignition classification ATEX II (1) GD.
Application Example
a) System component without own transmitter power supply (e.g. PLC, recorder, display)
b) Commubox
c) RN221N active barrier. (Transmitter set up using HART® communication)
d) The intrinsically safe Cerabar S pressure transmitter is connected via the RN221N power supply with intrinsically safe input
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Technical data
InputNumber of inputs 1 Power requirement 16.7 V ± 0.2 V (at I = 20 mA) Open circuit voltage 26 V ± 5 % Short circuit current ≤40 mA Internal resistance 328 Ω Over range 10 % Reference conditions Calibration temperature at 25 °C (77 °F) Ambient temperature influence ≤0.1 % in range 0 to 50 °C (32 to 122 °F)
≤0.2 %/10 K in range –20 to 0 °C (–4 to 32 °F)
Intrinsically safe input optionOpen circuit voltage 27.3 V Short circuit current 87.6 mA Power consumption 597 mW Capacitance 86 nF [EEx ia] IIC
683 nF [EEx ia] IIB, [EEx ia] IIA
Inductance 5.2 mH [EEx ia] IIC
18.9 mH [EEx ia] IIB, [EEx ia] IIA
OutputNumber 1 Open circuit voltage 24 V ± 10 % Over range 10 % Load (impedance) 0 to 700 Ω (without communication resistance) Galvanic isolation To all other current circuits Relay output Optional 250 V AC/30 V DC, 3A normally open/normally closed Power supplyPower supply 20 to 250 V DC/AC, 50/60 Hz Power consumption Without HART® diagnosis max. 2.5 W
with HART® diagnosis max. 5.0 W
Current requirement (Input current limitation) Imax /In < 15 Electrical safety To EN 61 010-1, protection Class I, over voltage category II, over current protection at installation (fuse) ≤ 10 A Performance characteristicsLinearity ≤0.15 % Load influence ≤0.1 % Operating conditionsAmbient temperature –20 to +50 °C (–4 to 122 °F) Storage temperature –20 to +70 °C (–4 to 158 °F) Climatic class To EN 60 654-1 Class B2 Ingress protection IP 20 EMC Immunity to EN 61326, Class A Mechanical constructionDimensions (W×H×D) 22.5 × 96 × 112 (0.89" × 3.78" × 4.33") for top hat DIN rail to EN 50 022-35 Housing PC/ABS, UL 940 Terminals Keyed plug-on screw terminals, core size 2.5 mm² solid, or strands with ferrules;
front mounted communication socket for 2 mm (0.79") jack plugs
Display and operating levelDisplay elements LED yellow in series to current output: Illuminates, when output current circuit is closed LED current >2 mA Remote communication HART® communication: Communication signals are transmitted bi-directionally. Communication resistance: Resistance for HART® communication 250 Ω built in. Please take note of voltage drop! ApprovalsEx approval ATEX II (1) GD [EEx ia] IIC Dimensions (in mm)
a) without HART® diagnosis
b) with HART® diagnosis
Installation according to instruction manual
Electrical connection
RN221N without HART® diagnostics
a) HART® connection sockets
b) Input (sensor) with loop power supply (intrinsically safe option)
c) Active output 4 to 20 mA
RN221N with HART® diagnostics
a) HART® connection sockets
b) Input (sensor) with loop power supply (intrinsically safe option)
c) Active output 4 to 20 mA
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