Vibro-meterGSI127 galvanic separation unit

environmental protection.

Vibration

(according to IEC 60068-2-6)

: 2 g peak above resonant frequency and 0.35 mm peak below

(10 to 55 Hz, 6 hours/axis)

Shock acceleration

(according to IEC 60068-2-27)

: 15 g peak

(half sine impulse, 11 ms duration, 3 shocks/axis)

Altitude : 4000 m (13100 ft) max.

Note: Reduced air density affects cooling ability.

Potentially explosive atmospheres (ordering option code A2)

Available in Ex approved versions for use in hazardous areas

*UKCA marking is not engraved/marked on the product.

For specific parameters of the mode of protection concerned and special conditions for safe use,

refer to the Ex certificates that are available from Parker Meggitt.

When using protection mode “Ex ec” (increased safety), the user must ensure that the GSI127 is 

installed in an industrial housing or enclosure that ensures a protection rating of at least IP54 

(or equivalent).

For the most recent information on the Ex certifications that are applicable to this product,

refer to the Ex product register (PL-1511) document that is available from Parker Meggitt.

Note: Some certifications and approvals are pending!

SPECIFICATIONS (continued)

Approvals

Conformity : European Union (EU) declaration of conformity (CE marking)

Electromagnetic compatibility

(EMC)

: EMC compliant (2014/30/EU):

EN 61000-6-2:2005.

EN 61000-6-4:2007 + A1:2011.

Electrical safety : EN 61010-1:2010

Environmental management : RoHS compliant (2011/65/EU)

Hazardous areas : Ex approved versions

(see Potentially explosive atmospheres on page 3)

Functional safety : SIL 2 in accordance with IEC 61508

Note: Some certifications and approvals are pending!

Electrical

Power supply (to GSI127)

Input voltage range : 24 VDC nominal (20 to 28 VDC)

Power consumption : <3.1 W

Current consumption : <130 mA (with 24 VDC power supply)

Overvoltage protection : >30 VDC

Supply impedance (sensor side)

• Ordering option codes B01-B11 : <30 Ω

• Ordering option code B21 : >50 kΩ

Note: The GSI127 should be powered (energized) using a limited-power, low-voltage power supply such as a 

APFxxx 24 VDC power supply or other suitable power supply unit.

In safety-related applications, a GSI127 must be powered using a limited-power, low-voltage power supply with a safe 

limitation of 60 VDC (nominal), even in the event of a single fault with the power supply.

Input signal (sensor side)

Supply (to measurement chain)

• Ordering option codes B01-B03 

and B11

: 20 VDC ±1 VDC / 21 to 30 mADC.

Note: 30 mADC is the maximum (short-circuit) current.

• Ordering option code B04 : 21 VDC ±1 VDC / 20 to 30 mADC.

Note: 30 mADC is the maximum (short-circuit) current.

• Ordering option code B05 : −21 VDC ±1 VDC / 20 to 30 mADC.

Note: 30 mADC is the maximum (short-circuit) current.

• Ordering option code B21 : 8 mADC ± 0.5 mADC / 22 to 30 VDC.

Note: 30 VDC is the maximum (open-circuit) voltage.

Input dynamic range

• Ordering option codes B01-B03 

and B11

: 2 to 20.75 mADC

• Ordering option code B04 : 1.3 to 19 VDC

• Ordering option code B05 : −1.3 to −19 VDC

• Ordering option code B21 : 1.3 to 20.3 VDC

SPECIFICATIONS (continued)

Output signal (monitor side)

Output voltage dynamic range 

(with 10 kΩ load)

: 0.8 to 20.8 VDC

Output impedance : <30 Ω, protected against short-circuits

Power supply voltage rejection ratio (PSRR)

• 10 Hz to 400 Hz : ≥60 dB

• 400 Hz to 20 kHz : ≥46 dB

Transfer characteristics

Galvanic separation

• Sensor side and monitor side : 4 kVRMS

• Power supply and output signal : 50 VRMS

Sensitivity and offset (zero)

• Ordering option code B01 : 1 V/mA and 2 VDC 

• Ordering option code B02 : 1 V/mA and −5 VDC 

• Ordering option code B03 : 3.2 V/mA and −48 VDC 

• Ordering option code B04 : 1 V/V and 0 VDC 

• Ordering option code B05 : −1 V/V and 0 VDC 

• Ordering option code B11 : 0.5 V/mA and 0 VDC 

• Ordering option code B21 : 1 V/V and 0 VDC 

Note: See also Accuracy, Output offset and other parameters in

DC transfer on page 5, and AC transfer on page 6.

Transfer function : Output value = (Input value × Sensitivity) + Offset

Where:

Output value is the value of the analog voltage output signal from the 

GSI127.

Input value is the value of the analog input signal (current or voltage) to 

the GSI127.

Sensitivity is the transfer sensitivity for a particular variant of the GSI127, 

as defined by the ordering option code.

Offset is the output offset for a particular variant of the GSI127, 

as defined by the ordering option code.

DC transfer

Accuracy : ±1% (at ambient temperature)

Sensitivity drift : ±50 ppm/°C (over operating temperature range)

Linearity error

(best straight-line INL)

: <0.2%

Output offset

(middle of DC range)

: ±200 mVDC

Output offset drift

(middle of DC range)

: ±2 mV/°C (over operating temperature range)

SPECIFICATIONS (continued)

AC transfer

Bandwidth

• Frequency band (±0.5 dB) : DC to 20 kHz

• −3 dB cut-off frequency (typical) : 30 kHz 

Accuracy : ±0.5 dB (over bandwidth from DC to 20 kHz)

Linearity error

(total harmonic distortion (THD))

: <−46 dB (0.5%) (over bandwidth from DC to 20 kHz)

Full-scale dynamic signal to noise ratio 

(SNRFSD) 

: >80 dB (from 10 to 2 kHz)