GE VME-3125A Isolation Scan 12 Bit 32 Channel Analog to Digital Converter Board (6U)

Input characteristics

(At+25 ° C and rated power supply, unless otherwise specified)

Number of channels: 32 single ended or 16 differential voltage input channels; 32 single ended current input channels

Voltage range: ± 50mV to ± 10V (bipolar) or 0 to+100mV, 0 to+10V (unipolar), factory configured for ± 10V input range

Current terminal: Suitable for single ended, 0-10V, and X1 gain unipolar configurations, with two options: 250 Ω 0.01% and 500 Ω 0.01%

Current range: According to the applicable input range of the terminal, 250 Ω corresponds to 0 to 20mA, 4 to 20mA, 5 to 25mA; 500 Ω corresponds to 0 to 20mA, 4 to 20mA

Input impedance: When the power is turned on, the voltage input options are DC differential 27M Ω, DC common mode 1.3M Ω, AC differential 9K Ω, and AC common mode 9K Ω. When the power is turned off, the DC differential 11K Ω, DC common mode 6K Ω, AC differential 9K Ω, and AC common mode 5K Ω

Input bias current: minimum 44nA/maximum 90nA

Input bias current drift: 0.30nA/° C

Common mode voltage (CMV): When the differential input is at zero input signal, the maximum ± 11V; CMV refers to the common analog ground of all inputs; For other gains, the formula is ± 11V=(VCM+Vddiff/2) * gain

Common mode rejection ratio (CMRR): Differential input has different minimum/typical values (dB) at different gains and ADC ranges when the source is unbalanced at 350 Ω and the frequency is between DC and 60Hz

Input to VMEbus isolation: 1000VDC

Input noise: Under 10 to 1000Hz and 3 σ, different gains and ranges have different maximum noise (mV p-p) in single ended mode

Each input bandwidth: DC to Fc, where Fc is 50kHz for a 50kHz filter and 40Hz for a 40Hz filter option unit

Input filter: Single pole passive low-pass filter, -3dB at 50kHz or 40Hz ± 20% (voltage input option only)

Overvoltage protection: maximum ± 40V continuous during power supply; ± 25V during power outage

Transmission characteristics

(At+25 ° C and rated power supply, unless otherwise specified)

Measurement resolution: 12 bits

Channel scanning rate: minimum 40KSPS (thousand samples/second) total rate

Voltage transfer function:

E IN=E LO+E FSR × 4096N ADC, where E IN=input voltage, E LO=lower end of input range,

E FSR=full-scale input range, N ADC=A/D converter reading

Current transfer function: I IN=R TERMINATION E FSR × N ADC/4096, where I IN=input current (ampere), E FSR=10V (unipolar), N ADC=A/D converter reading, R TERMINATION=250 Ω or 500 Ω options

Input range of A/D converter: ± 5V, ± 10V, 0 to+10V, jumper optional

Input gain of A/D converter: x1, x10, x100 (± 0.3%, jumper optional)

Accuracy: Voltage input=± 0.04% reading ± 0.03% range ± 2.0mV; Current input (-200, -300 options)=± 0.05% range ± 2.44 μ A

Temperature stability: The voltage input board option (mV/° C) is ± 30PPM reading ± 25PPM range ± 20 μ V; The current input board option (μ A/° C) is ± 40PPM reading ± 25PPM range ± 20nA

Long term drift: ± 50PPM reading ± 45PPM range ± 100 μ V every 1000 hours

Channel crosstalk: In ± 10V bipolar and gain X1 differential mode, different options have different typical/maximum values (dB) for DC and AC inputs

BIT reference voltage: Software options include 0.000V,+4.980V,+0.4928V, and 9.91mV

BIT reference accuracy: ± 30mV ± 30PPM/° C (4.98VDC)

Physical/Environmental Specifications

Size: Standard VME double height board 160 × 233.5mm

Power requirement:+5VDC (± 5%), maximum 1.5A

Temperature: Operating temperature from 0 ° C to+65 ° C; Storage temperature from -40 ° C to+85 ° C

Humidity: Operating relative humidity of 20% to 80%, no condensation

Cooling: forced air convection (standard VME slot)

MTBF: Contact the factory

Input connector (P3): 37 pin ultra small D-type female connector