PR Electronics Universal frequency converter PR 3225

2026-04-21

PR3225 Universal frequency converter

Input specifications

Frequency input

Frequency range 0.001 Hz to 100 kHz
Time range, time function 10 μs to 999.9 s
Max. frequency / min. pulse width, with input filter ON 75 Hz / 8 ms

Sensor specifications

Tacho, trig-level LOW / HIGH ≤ -50 mV / ≥ +50 mV
NPN / PNP, trig-level LOW / HIGH ≤ 4.0 V / ≥ 7.0 V
TTL, trig-level LOW / HIGH ≤ 0.8 V / ≥ 2.0 V
S0, trig-level LOW / HIGH ≤ 2.2 mA / ≥ 9.0 mA
NAMUR, trig-level LOW / HIGH ≤ 1.2 / ≥ 2.1 mA

Special voltage / current input

User-programmable trig-levels -0.05…6.50 V 0.0…10.0 mA

Output specifications

Current output

Signal range, active 0…23 mA
Programmable signal ranges 0 / 4…20 mA
Load (@ current output) ≤ 600 Ω
Load stability ≤ 0.001% of span / 100 Ω
Response time, programmable 0.0…60.0 s
Sensor error indication 0 / 3.5 / 23 mA / none
Current limit ≤ 28 mA

Voltage output

Signal range ≤ 11.5 VDC
Programmable signal ranges 0…1; 0…5; 0…10; 0.2…1; 2…10 VDC
Load (@ voltage output) ≥ 10 kΩ
Response time, programmable 0.0…60.0 s

Relay output

Relay functions Setpoint, Window and Latch
Hysteresis 0…100%
ON and OFF delay 0…3600 s
Power On delay 0…9999 s
Sensor error reaction Break / Make / Hold
Max. voltage 250 VAC / 200 VDC
Max. current 2 A
Max. AC power 100 VA
Max. DC current, resistive load ≤ 30 VDC 2 ADC
Max. DC current, resistive load > 30 VDC See manual for details

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