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The IPC704 signal conditioner converts the chargebased signal from a piezoelectric-based transducer into a current or a voltage signal. This current or voltage signal is transmitted to the processing electronics via a standard 2-wire or 3-wire transmission cable. The current modulation technique allows transmission over a distance of up to 1 km. A GSI galvanic separation unit is required for this configuration. The electronic circuitry of the IPC704 signal conditioner is incorporated into a moulded aluminium enclosure. The signal conditioner has configurablehigh-pass and low-pass filters and an optional integrator to give a velocity output. Furthermore, RFI filters protect the input and output against radiofrequency interference and other electromagnetic influences. A range of installation options are available for the IPC704 signal conditioner, including:

» A polyester enclosure providing environmental protection against dust, oil and water jets. » A mounting adaptor allowing the IPC704 signal conditioner to be mounted on a DIN rail.

Two versions of the IPC704 signal conditioner are available: » An IPC704 for sensors using standard piezoelectric materials, for example, CAxxx, CP10x and CP2xx (ordering number 244-704-000-042-...).

» An IPC704 for sensors using GaPO4 piezoelectric material, for example, CP50x (ordering number 244-704-000-511-...).

Environmental characteristics (Specifications according to IEC 60068-2 recommendations) General Temperature • Operation : −30 to +85 °C • Storage : −40 to +85 °C Humidity : Max. 95 % non-condensing. Note: For operation in a humid environment, ordering option A3 (potted version) should be considered. Protection rating (according to IEC 60529) : IP40 Vibration (according to IEC 60068-2-26) : 2 g peak between 10 and 500 Hz Shock acceleration (according to IEC 60068-2-27) : 15 g peak (half sine, 11 ms duration) Industrial housing (ordering option G1) Protection rating (according to IEC 60529) : IP66 Impact resistance : > 4 mJ/mm2 (DIN 53453) Chemical resistance : Good resistance to seawater, acids, alkaline solutions, gasoline and oils Flammability : UL94V-0 self-extinguishing

Power supply to IPC704 Voltage : 18 to 30 VDC Current : 25 mA (max.) Transfer characteristics (ordering option B) IPC704 for sensors using standard piezoelectric materials (244-704-000-042-... ) • Transfer without integrator : 0.1 to 10 mV/pC or 0.1 to 10 µA/pC • Transfer with integrator : 981 to 98 100 mV/(pC.s) or 981 to 98 100 µA/(pC.s) IPC704 for sensors using GaPO4 piezoelectric material (244-704-000-511-... ) • Transfer : 0.1 to 50 mV/pC or 0.1 to 50 µA/pC Linearity error : ≤ 0.2 % Temperature stability : 100 ppm / °C typical Phase : 180° between the input signal and the acceleration output. 180° between the input signal and the pressure output. 90° between the acceleration and velocity outputs.

Input characteristics (ordering option C) Compatible sensors : Any piezoelectric-based transducer – symmetrical or non-symmetrical, case grounded or insulated Dynamic range : 100 000 pC peak Input sensitivity • Accelerometers : See IPC704 for accelerometers (acceleration output) using standard piezoelectric materials on page 6 and IPC704 for accelerometers (velocity output) using standard piezoelectric materials on page 6 • Dynamic pressure transducers : See IPC704 for pressure sensors using standard piezoelectric materials on page 7 and IPC704 for pressure sensors using GaPO4 piezoelectric material on page 8 Charge amplifier : Symmetrical RFI filter : Symmetrical LC network Resistance : ≥ 50 kΩ (sensor and cable) Capacitance : ≤10 nF (sensor and cable)

Output characteristics (ordering option D) RFI filter : Symmetrical LC network 2-wire current transmission • Dynamic signal : Max. ± 5 mA peak • Standing current : 12 mA ± 0.5 mA • Electrical connection : +24 V = “+”, COM = “−” • Output sensitivity : See Ordering information on page 12 • Max. dynamic range : 5 mA peak / output sensitivity 3-wire voltage transmission • Dynamic signal : Max. ± 5 V peak • Standing voltage : 7.5 V ± 0.2 V • Output sensitivity : See Ordering information on page 12 • Output impedance : 750 Ω (3-wire configuration) • Max. dynamic range : 5 V peak / output sensitivity