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Vibro-Meter GSI124 244-124-000-022 Galvanic Separation Unit

Vibro-Meter GSI124 244-124-000-022 Galvanic Separation Unit

Item NO.: GSI124 244-124-000-022
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Detail

  • Product NameVibro-Meter GSI124 244-124-000-022 Galvanic Separation Unit
  • Item NO.GSI124 244-124-000-022
  • Weight0.1300 kg = 0.2866 lb = 4.5856 oz
  • CategoryTSI
  • BrandVibro-Meter
  • Creation Time2025-11-26
  • Vibro-Meter GSI124 244-124-000-022 galvanic separation unit for compatible two-wire CE, IPC and IQS4xx measurement chains. Manufacturer-rated 4 kVRMS isolation, DIN-rail mounting, 0 to 70°C operation and 130 g weight. The manufacturer identifies GSI124 as obsolete and names GSI127 as its successor; wiring orientation, grounding, cable length and ordering options must be checked before replacement.
Vibro-Meter machinery measurement chain component

GSI124 244-124-000-022 Galvanic Separation Unit

A DIN-rail galvanic separation unit for compatible two-wire Vibro-Meter transducers and signal conditioners. It powers the field-side device, transfers the dynamic signal to the monitoring side and separates the measurement chain by 4 kVRMS.

4 kVRMSGalvanic separation voltage
0 to 70°CManufacturer-rated operation
DIN railPanel or cabinet mounting
130 gPublished unit weight

Product information

The GSI124 belongs to the Vibro-Meter product line. Manufacturer documentation describes it as a versatile galvanic separation unit for piezoelectric transducers with integrated electronics (CE series), piezoelectric-transducer signal conditioners (IPC series) and proximity-probe signal conditioners (IQS4xx series).

It is intended for high-frequency two-wire transmission systems and can supply compatible electronic systems consuming less than 20 mA. The unit supports long-distance AC-signal transmission, rejects frame/ground-noise voltage and avoids AC pickup between the sensor case and sensor poles. The manufacturer also published an Ex ordering option for use with certified measurement chains in potentially explosive atmospheres.

Technical data

Manufacturer / product line Vibro-Meter (Meggitt SA)
Type GSI124 galvanic separation unit
Part number supplied 244-124-000-022
Compatible device groups CE-series transducers, IPC-series signal conditioners, IQS4xx-series signal conditioners
User-side supply 20 to 30 VDC with IPC/CE; 22.5 to 30 VDC with IQS4xx
Current consumption at 24 VDC ≤20 mA no-load; ≤50 mA at 12 mA field current; ≤70 mA at 20 mA or field-side short circuit
Field-side two-wire supply 21.5 VDC ±2.5 VDC, no load
Field current / short-circuit limit 0 to 20 mA / ≤30 mA
Monitor-side output Voltage output; dynamic range ≥2 VDC to ≤supply −2.5 VDC with 10 kΩ load; output impedance ≤1 Ω
Transfer sensitivity IPC/CE: 1 V/mA ±10 mV/mA; IQS4xx: 3.2 V/mA ±32 mV/mA — ordering option dependent
Bandwidth IPC/CE options B1/B2: DC to 20 kHz within ±0.5 dB; IQS4xx option B3: DC to 10 kHz within ±0.5 dB
Linearity / galvanic separation <0.2% / 4 kVRMS
Operating / storage temperature 0 to 70°C / −20 to +85°C
Humidity Operating up to 90% RH; storage up to 95% RH; non-condensing
Housing / connection / mounting Green PA 6.6 polyamide housing; screw terminals; DIN-rail mounting
Weight 130 g

Data scope: values are limited to manufacturer-published GSI124 data. Exact approval, sensitivity and zero-offset ratings depend on the complete ordering suffix shown on the unit nameplate.

Applications and selection

  • Two-wire vibration and proximity measurement chains using compatible CE, IPC or IQS4xx devices.
  • Long cable runs where current-to-voltage transfer and strong rejection of frame voltage are required.
  • Panel or cabinet installations associated with machinery monitoring and protection systems.
  • Certified hazardous-area measurement chains only when the complete GSI124 Ex ordering option and loop approvals are confirmed.
Selection requirement: 244-124-000-022 does not by itself show every environment and transfer-function suffix used in the manufacturer ordering scheme. Before purchase or substitution, verify the full nameplate, original sensor/conditioner family, transfer sensitivity, zero offset and hazardous-area approval.

GSI124 vs GSI127: key differences

The manufacturer names GSI127 as the successor to GSI124, but the two units are not automatically interchangeable without checking the complete measurement chain. The comparison below is limited to manufacturer-published information.

Comparison point GSI124 / 244-124-000-022 GSI127 successor
Lifecycle Legacy unit; manufacturer documentation identifies it as no longer available. Manufacturer-named replacement; newer base PNR 244-127-000-021.
Supported signal types Primarily two-wire current-transmission chains using CE, IPC and IQS4xx devices. Supports current- or voltage-output chains; also compatible with industry-standard IEPE and 4 to 20 mA loop-powered sensors/transmitters, subject to ordering option.
Sensor-side input range 0 to 20 mA on the two-wire transmission line. 0 to 20.75 mA or 0 to 20.3 VDC.
Transfer functions 1 V/mA for IPC/CE or 3.2 V/mA for IQS4xx, with option-specific zero offset. 0.5, 1 or 3.2 V/mA, plus 1 V/V or −1 V/V; configurable zero-offset variants.
Galvanic separation 4 kVRMS between sensor and monitor sides. 4 kVRMS between sensor and monitor sides, plus 50 VRMS between the power supply and output signal for a floating output.
Operating temperature 0 to 70°C. −20 to 70°C.
Diagnostics / functional safety Legacy data sheet publishes standard and Ex variants; no comparable remote chain-health diagnostics are specified. Includes automatic remote measurement-chain health/status diagnostics and is suitable for SIL 2 functional-safety contexts.
Terminals Screw-terminal connections; monitor side at the top and sensor side at the bottom. Removable screw-terminal connectors; sensor side at the top and monitor side at the bottom.
Ground connection Uses a black flying grounding lead connected from the underside of the unit to the DIN rail. The GSI124 grounding lead is removed; the manufacturer states that it is not required by GSI127.
Replacement impact Existing field and monitor cables terminate in the legacy orientation. Cable routing or cable length may require adjustment because the sensor- and monitor-side positions are reversed.
Replacement conclusion: GSI127 is the official successor, but it is not a universal plug-and-play replacement. Confirm the original GSI124 environment/sensitivity suffix, sensor or signal-conditioner type, transfer function, zero offset, hazardous-area approval, terminal wiring, grounding and available cable length before commissioning.

Lifecycle and replacement guidance

Manufacturer status: no longer available / obsolete.
Documented timing: manufacturer installation manual Edition 8, issued October 2018, records the GSI124 as no longer available and replaced by the GSI127. The manufacturer does not publish a separate exact factory discontinuation date in the reviewed documentation, so October 2018 is evidence of status, not an asserted exact EOL date.
Manufacturer-named successor: GSI127 galvanic separation unit.
Is it a complete drop-in replacement? No automatic one-for-one claim should be made without engineering checks. Manufacturer instructions show that GSI124 monitor-side connections are at the top and sensor-side connections at the bottom, while GSI127 uses the opposite arrangement. Cable lengths may need adjustment. The GSI124 grounding lead is removed because the GSI127 does not require that ground connection. Match the GSI127 environment and transfer-function options to the original measurement chain.

For related monitoring components, browse the TSI category or the Vibro-Meter product collection.

Frequently asked questions

What does the GSI124 do?

It powers compatible two-wire transducers or signal conditioners, transfers their dynamic signal to the monitoring side and provides 4 kVRMS galvanic separation with high rejection of frame voltage.

Is 244-124-000-022 the complete configuration code?

The manufacturer ordering scheme also uses environment and transfer-function suffixes. Confirm the complete nameplate before ordering, especially for Ex approval and sensitivity/zero-offset matching.

Has the GSI124 been discontinued?

Yes. Manufacturer documentation issued in October 2018 identifies the GSI124 as no longer available. No separate exact factory EOL date is stated in the reviewed manufacturer documentation.

What is the manufacturer-named replacement?

The manufacturer names the GSI127 as the replacement. The correct GSI127 ordering options must be selected for the original sensor or signal-conditioner chain.

Can GSI127 replace GSI124 without wiring changes?

Not always. The manufacturer documents reversed top/bottom sensor- and monitor-side connection positions, possible cable-length adjustment and removal of the GSI124 grounding lead. Verify wiring, transfer function and hazardous-area approval before commissioning.

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