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Models: |
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terminal type PI121 |
split-core type PI121P |
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- the signal mean value is calibrated in the corresponding sine wave r.m.s. value
- the 0 to 20mA output is powered from the source of the quantity measured
- the 4 to 20mA output must be powered from the output loop
- direct processing of currents of up to 100A (PI121P)
- rectifying measuring method
- input-to-output isolation: 4000Vr.m.s.
- measuring range: 0 to 120% of rated input
- conversion accuracy: < 0,5%
- compact design
- designed for DIN 35 rail mounting
- low cost |
The converters have been designed to convert the AC
voltage/current mean value into a unified-range DC current. The converter input includes a current measuring
transformer. It is of a coil-type in the PI121 converter and of the split-core-type in the PI121P converter.
It isolates the input circuit and feeds the output current loop. The output is full-wave rectified and smoothed
out. Both the input and the output circuit are overload-protected.
The output is r.m.s. value calibrated for a harmonic distortion factor
of 1.1107 (sine wave). This converter is suited for handling inputs whose waveforms are slightly distorted. If
frequency converters or other non-linear control elements are to be used in the control system under consideration,
the use of true r.m.s. value converters is advisable. |
Electrical specifications: |
| - operating temperature range: |
-25...+80°C |
| - storage temperature range: |
-40...+ 80°C |
| - power supply: |
the converter is powered via the input current loop |
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the 4 to 20mA output, via the output loop |
| - inputs: |
PI121: |
1A, 2,5A, 5A AC |
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PI121P: |
50A, 75A and 100A per a split-core pass |
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other ranges by arrangement |
| - current input power demand: |
typically 0,5VA |
| - current input overload capacity: |
2 Inom - 1 min, 20 Inom - 1 s |
| - output: |
0-20mA, 4-20mA |
| - output current limit: |
typically 35mA (electronic cut-out) |
| - maximum output load: |
500 W |
| - transfer function: |
linear |
| - transfer function maximum error: |
< 0,5% |
| - temperature induced error: |
< 0,02%/°C |
| - output ripple: |
< 0,5% |
| - test voltage: |
4000Vr.m.s. |
| - time constant: |
< 0,3s |
| - weight: |
120g |
| - enclosure: |
casing / terminal board: |
IP40 / IP10 |
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| Type tests: |
Standard type test:
EMC:
Safety: |
to CSN EN 60688
to CSN EN 61326-1
assessed acc. to CSN EN 61010-1 |
Terminal designation: |
PI121
PI121P |
1,2...input terminals
3,4...output terminals (4 is +)
no input terminals available (split-core type)
3,4...output terminals (4 is +) |
Dimension sketch:
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Ordering instructions:
Your order should include:
- converter type
- input range
- output range
- quantity (No. of pieces) |
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Czech version 
English version 
