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Overview
Essential details：GSI127 244-127-000-017 galvanic separation unit
• From the vibro-meter® product line
• Power supply for sensors and signal conditioners with a current output or a voltage output
• 4 kVRMS galvanic separation between the sensor side and the monitor side
• 50 VRMS galvanic separation between the power supply and the output signal (floating output)
• High rejection of frame voltage
• µA to mV transfer function for current-signal transmission over longer distances
• V to V transfer function for voltage-signal transmission over shorter distances
• Ex certified for use in potentially explosive atmospheres (hazardous areas)
• Compatible with industry standard IEPE (integrated electronics piezo electric) vibration sensors
The GSI127 is a galvanic separation unit from Meggitt’s vibro-meter® product line. It is designed for operation with the signal conditioners, charge amplifiers and electronics (attached or integrated) used by various vibro-meter® measurement chains and/or sensors.
Compatible devices include the IPC707 signal conditioners (charge amplifiers) used by CAxxx piezoelectric accelerometers and CPxxx dynamic pressure sensors (and older IPC704 signal conditioners too), the IQS9xx signal conditioners used by TQ9xx proximity sensors (and older IQS4xx signal conditioners too), the attached or integrated electronics used by CExxx piezoelectric accelerometers, and the integrated electronics used by the VE210 velocity sensor. The GSI127 is also compatible with industry standard IEPE (integrated electronics piezo electric) vibration sensors, that is, the integrated electronics used by constant-current voltageoutput sensors such as the CE620 and PV660 (and older CE680, CE110I and PV102 sensors too).
The GSI127 galvanic separation unit is a versatile unit that can is used for the transmission of highfrequency AC signals over long distances in measurement chains using current-signal transmission or as a safety barrier unit in measurement chains using voltage-signal transmission. More generally, it may be used to supply any electronic system (sensor side) having a consumption of up to 22 mA.
GSI127 244-127-000-017
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GSI127 244-127-000-017 galvanic separation unit
The GSI127 also rejects a large amount of the frame voltage that can introduce noise into a measurement chain. (Frame voltage is the ground noise and AC noise pickup that can occur between the sensor case (sensor ground) and the monitoring system (electronic ground)).
In addition, its redesigned internal power supply results in a floating output signal, eliminating the need for an additional external power supply such as an APF19x.
The GSI127 is certified to be installed in an Ex Zone 2 (nA) when supplying measurement chains installed in Ex environments up to Zone 0 ([ia]). The unit also eliminates the need for additional external Zener barriers in intrinsic safety (Ex i) applications.
The GSI127 housing features removable screwterminal connectors that can unplugged from the main body of the housing to simplify installation and mounting. It also features a DIN-rail mounting adaptor that allows it to be mounted directly on a DIN rail.
For specific applications, contact your local Meggitt representative.
1. Only CExxx piezoelectric accelerometers with a current output signal require
a GSI127. For example, the CE134, CE281 and CE31x.
2. An IPCxxx signal conditioner or a VE210 velocity sensor with a current output signal is typically used for signal transmission over longer distances.
Note: For an IPC707 without diagnostics, the nominal current output signal (DC) is 12 mA (→ 7 V). For an IPC707 with diagnostics, the nominal current output signal (DC) is 13 mA (→ 8 V).
Refer to the IPC707 signal conditioner data sheet for further information.
3. An IQSxxx signal conditioner with a current output signal is typically used for signal transmission over longer distances.
4. An IPCxxx signal conditioner with a voltage output signal is typically used for signal transmission over shorter distances.
Note: For an IPC707 without diagnostics, the nominal voltage output signal (DC) is
7 V. For an IPC707 with diagnostics, the nominal voltage output signal (DC) is 8 V.
Refer to the IPC707 signal conditioner data sheet for further information.
5. An IQSxxx signal conditioner or a VE210 velocity sensor with a voltage output signal is typically used for signal transmission over shorter distances.
6. For use with industry standard IEPE (integrated electronics piezo electric) vibration sensors, that is, constant-current voltage-output sensors such as the CE620 and PV660 (and older CE680, CE110I and PV102 sensors)
