VariTrans P Standard-Signal Isolators

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1 VariTrans Standard-Signal Isolators Warranty Defects occurring within 5 years from delivery date shall be remedied free of charge at our works (carriage and insurance paid by sender). The professional standardsignal isolator. With calibrated range selection and broad-range mains selection. The task Guaranteeing reliable and safe system operation requires galvanic isolation between the measuring signal sensors and the control (e.g. PCS, SPC etc.). The problems Difficulties are often caused by a lack of space to install the isolators. In large systems in particular measuring signals are sent across long distances and providing a loadable and isolated signal is essential. The innovation Calibrated selection of the input and output ranges with DIP switches allows the new VariTrans professional standardsignal isolators from Knick to be used universally without tiresome readjustment. The broad-range mains adapter for all normal supply voltages from 20 to 253 V AC/DC is an unrivalled feature for isolators in such a compact modular case. The housing The new modular case which is only 12.5 mm wide and has plug-in screw clamp terminals now allows simple and fast assembly or even prewiring of the control cabinet. Housings with fixed screw clamp terminals are also available for extremely high mechanical loading. Adjusting the isolator has been simplified as the housing is easy to open. The function principle The analog signal transfer with transformer isolation and the new digitally controlled range selection system guarantee almost perfect signal transfer: Amplification error only 0.08 % Excellent pulse waveshape Extremely low residual ripple Maximum long-term stability and reliability The technology A microcontroller monitors the control element settings and controls the calibrated range selection. Signal transmission interference caused for example by contact resistances at the range selectors is therefore ruled out. The Vari mains adapter allows the units to be used in any country with practically any power supply. The extremely low power consumption and the resulting minimum self-heating significantly increase the reliability. This is why we give a 5-year warranty

2 VariTrans Flexible and precise Calibrated signal switch-over, easy selection of input and output range without tedious readjustment. Vari 20 to 253 V AC/DC broad range mains adapter Universally applicable for all common supply voltages Extremely compact design 12.5 mm modular case; up to 80 active isolators per meter top-hat rail 3-port isolation Protects against erroneous measurements or damage due to parasitic voltages High accuracy No distortion of measured signal Protective separation to VDE 0100 Part 410 Protects service personnel and downstream devices against impermissibly high voltages Maximum reliability Omits repair effort and the related costs Quick and easy configuring Housing can easily be opened. A pull-out lock on the electronics section prevents disengagement of the pcb. Pluggable screw-clamp terminals Easy and time-saving mounting and prewiring of control cabinets Individual test certificate Based on EN , for example for QM documentation

3 Product line Instruments Ref. No. Ref. No. Pluggable screw Fixed screw clamp Input Output clamp terminals terminals input and output H1 F1 adjustable to calibrated ranges with permanent 0 to 20 ma 0 to 20 ma P H1 P F1 settings 0 to 20 ma 4 to 20 ma P H1 P F1 0 to 20 ma P H1 P F1 4 to 20 ma 0 to 20 ma P H1 P F1 4 to 20 ma 4 to 20 ma P H1 P F1 4 to 20 ma P H1 P F1 0 to 20 ma P H1 P F1 4 to 20 ma P H1 P F1 P H1 P F1 Specifications Input data Inputs 0 to 20 ma terminal/switch selectable (factory setting 0 to 20 ma) 4 to 20 ma or with permanent settings (see Product line) Input resistance Current input voltage drop approx. 250 mv at 20 ma Voltage input approx. 1 M½ Input capacitance Approx. 1 nf Overload Current input ²300 ma Voltage input V limiting by suppressor diode to 30 V, max. permissible permanent current 30 ma Output data Output 0 to 20 ma selectable (factory setting 0 to 20 ma) 4 to 20 ma or with fixed setting (see Product line) (negative signals are transmitted up to approx. 5 % full scale) Load For output current ²12 V (600 ½ at 20 ma) For output voltage ²10 ma (1 k½ at 10 V) 1) Offset 20 µa / 10 mv Residual ripple <10 mv rms 1) Higher load at voltage output on request

4 VariTrans Specifications Further data Gain error <0.08 % meas. value Temperature coefficient 2) <50 ppm/k of final value Bandwidth > 10 khz; F1/H1 switchable to < 10 Hz Test voltage 4 kv~ input against output against power supply Working voltage 600 V AC/DC for overvoltage category II and pollution degree 2 to EN (basic insulation) For applications with high working voltages, take measures to prevent accidental contact and make sure that there is sufficient distance to adjacent devices or sufficient insulation between them. Protection against Reinforced insulation to EN and protective separation to VDE 0100 Part 410 as electrical shock defined in VDE 0106 Part 101 up to 300 V AC/DC between input and output and power supply for overvoltage category II and pollution degree 2. For applications with high working voltages, take measures to prevent accidental contact and make sure that there is sufficient distance to adjacent devices or sufficient insulation between them. EMC 3) 89/336/EEC EN , EN EN , EN Surge withstand 5 kv, 1.2/50 ms, to IEC Ambient temperature Operation 10 to +70 ºC Transport and storage 40 to +85 ºC supply 20 to 253 V AC/DC AC 48 to 62 Hz, approx. 2 VA DC approx. 0.9 W Construction Modular case, For dimensions see dimension drawings Type H1 with pluggable screw clamp terminals Type F1 with fixed screw clamp terminals Protection IP 20 Weight approx. 150 g 2) Average TC in specified operating temperature range 10 C to +70 C 3) Minor deviations possible during interference

5 Typical applications Potential isolation for safe coupling of the measuring signals to the evaluating electronics Transmitter e.g. C, bar 0/4 to 20 ma e.g. SPC, PCS Signal conversion e.g. for converting voltage into current signals for interference-free signal transmission over large distances Voltage output 0 to10 V 4 to 20 ma e..g. indicators, SPC, PCS Load increase e.g. for measuring signals with low loadability Current output e.g. C, bar 0 to 20 ma max. load 50 W, e.g.spc R I = 12,5 W 0 to 20 ma max. load 600 W Subject to change!

6 VariTrans Typical applications Signal multiplication e.g. for safe evaluation of measuring signals in different instruments Current output Voltage output 0/4 to 20 ma indicators indicators indicators indicator 2-wire application for easy implementation of 2-wire loops 2-wire transmitter e.g. C, bar 4 to 20 ma 0/4 to 20 ma or 24 V DC Mains adapter supply Block diagram + Voltage input Current input + C 1 nf Z 30 V C 1 nf C 1 nf + Z 18 V Output Subject to change! supply 20 to 253 V AC/DC

7 Dimension drawings and terminal assignments Case with pluggable screw clamp terminals 12.5 [0.49] 111 [4.37] Pluggable screw clamp terminals 99 [3.90] Metal lock for fastening on top-hat rail Case with fixed screw clamp terminals 12.5 [0.49] 111 [4.37] Fixed screw clamp terminals 99 [3.90] Terminal assignments 1 Input + current 2 Input current 3 Input + voltage 4 Input voltage 5 Output + 6 Output 7 supply ~ 8 supply ~ Metal lock for fastening on top-hat rail Wire cross-section max. 2.5 mm 2 Multi-wire connection max. 1 mm 2 (two wires with same cross-section) Note: All dimensions in mm [inches]. Subject to change!