Universal Converter (RTD/ TC/ Ohmm/ mA/ V) to 4-20mA (loop powered)

K121 is a performant universal converter able to manage all analog signals (mA, mV, V, PT100, Pt1000, Pt500, Ni100, TCs, Ohm) and convert / isolate it into 4..20mA loop powered signal. The output mode (normal/inverted), scale overrange, output in case of fault sensor are selectable parameters available by PC software. A 2-way galvanic isolation among input // output circuits assures the integrity of your datas. K121 is ATEX compliant product II 3G Ex nA IIC T4 Gc X (gas) II 3D Ex tc IIIC T135°C Dc X (dust).

    Specifications:
  • Conversion and transmission of the input read into a normalized signal current in the output for the loop 4 ..20 mA that is connected with 2 wire connection.
  • Thermocouple input J, K, R, S, T, B, E, N ( EN 60584 ).
  • RTD input (PT100 - 500 - 1000, Ni100) with 2, 3 o 4 wire connections.
  • Voltage input ± 30 V.
  • Voltage input ± 150 mV
  • Current input ± 24 mA.
  • Potentiometer input with resistance between 500 ? and 10 K?.
  • Resistance input up to 1760 ?.
  • Reduced response time (Voltage and Current input): 140 ms
  • Reduced response time (Other inputs): < 620 ms
  • High precision: 0,1%.
  • 16-bit measurement conversion.
  • 500 Vac output isolation.
  • Compact size 93 x 102,5 x 6,2 mm

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GENERAL DATA
Power Supply7..30 Vdc (from loop 4..20mA)
Side Power-
Hot swappingyes
Current consumption24 mA
Power consumption < 660 mW
A/D Conversion16 bit
Rejection50 o 60 Hz (configurable)
Settingssoftware (EASY)
FilterAdded for stable reading
Dimensions (w x h x d)6,2 x 93,1 x 102,5 mm
Isolation1,5 KVac (3-way
Isolation techniqueDigital (optocoupler)
Data processing32 bit floating point
Colourblack
EnclosurePBT
Weght45 g
Operating temperature-20..+65 °C
Connections8 Clamp terminals
Protection degreeIP 20
Precision class0,10%
Thermal drift< 120 ppm/K
Status indicatorsFault, alarm
Special functionsCold junction compensation
Filter
Reversed output
ApprovalsCE, II 3G Ex nA IIC T4 Gc X, II 3D Ex tc IIIC T135°C Dc X
NormsSafety (EN 61010-1), EMC (EN 61000-6-2, EN 61000-6-4, EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-5, EN 61000-4-6, EN 61000-4-11), Atex (EN 60079-0, EN 60079-15)
INPUT DATA
Channels1
Type Type THERMOCOUPLE J, K, R, S, T, E, B, N (EN 60584)
RTD (PT100, PT500, PT1000, NI100) connection 2,3,4 wires
Voltage (V) ± 30V, impedance 200 kO
Voltage (mV) ±150 mV, impedance 10 MO
Current: ±24 mA, impedance 40 O
Potentiometer: 500 O..10 KO
Resistance: up to 1760 O
OUTPUT DATA
Channels1
Type CURRENT 4..20mA
Response time (10-90%)140..620ms