Acces I/O products M.2-AIO16-16F Series Hardware Manual Download Page 3

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ACCES I/O Products, Inc.

MADE IN THE USA

mPCIe- and M.2-AIO16-16F Family Manual

Rev B7a

HAPTER

NTERFACE

This product interfaces with a PC using a PCI Express Mini Card
(mPCIe) connection; a small-form-factor, high-performance, rugged
peripheral interconnect technology first introduced for use in
laptops and other portable computers.

mPCIe’s small size and powerful performance, combined with

perfect software compatibility with PCI and PCIe peripheral designs,
have led to its recent adoption as a go-to standard for embedded
Data Acquisition and Control, and many other applications.

Although mPCIe is a broadly-adopted industry standard, the actual
connection to the computer shares a specification with mSATA:
both mSATA and mPCIe use the same edge-connector. In fact, well-
designed PCs can automatically detect and configure their onboard
connectors to work with either mPCIe or mSATA devices

–

and,

according to the standards for mPCIe and mSATA they are

supposed

to do so! However, some PC manufacturers ship computers that

only

support mSATA devices. Please confirm in your PC

documentation that your edge-connector is

actually

PCI Express

Mini Card compliant before installing this, or any, mPCIe card.
Damage might occur if you install an mPCIe device into a computer
that only supports mSATA.

mPCIe defines mounting holes for securing the otherwise loose end
of the card, so it is impossible for these cards to wiggle or flap
themselves loose (which was a recurring problem with the older PCI
Mini devices). Eliminating this concern for PCI Express Mini Cards is
a major reason this standard has seen rapid adoption by the Data
Acquisition and Control industry. Unfortunately, a variety of
mounting standoff lengths exist; ACCES offers stand-off kits in both
2mm and 2.5mm sizes. Some computers may provide stand-offs.
Please consult your computer manufacturer if it requires a different
size.

The mPCIe standard, like its PCI Mini Card predecessor, was
designed assuming use primarily in Laptop or Notebook and similar
devices, where physical dimension is often the paramount design
constraint. In Data Acquisition and Control applications low-weight
and vibration tolerance tend to be of more concern.

HAPTER

I/O

NTERFACE

Most customers will use the optional cable assembly CAB-mPCIe-
AIOs D-Sub Miniature 37-pin Male connector.

For Singled-Ended analog inputs connect GND to ADC COMMON.

A Note About Unused Analog Inputs:

Any unused analog input should be connected to ground with a
short jumper wire; either in the mating connector cable, or on the
breakout terminal board. This will reduce / eliminate crosstalk
which, if left unchecked, can influence measurements of adjacent

connected

input channels.

CAB-mPCIe-DB37M Male 37-Pin Pinout

S.E. Signal (Diff)

Assignment

GND 1 20 GND

COMMON 0-7 2 21 ADC Ch 0 (Ch 0+)

ADC Ch 1 (Ch 0-)  3  22  ADC Ch 2 (Ch 2+)
ADC Ch 3 (Ch 2-)  4  23  ADC Ch 4 (Ch 4+)
ADC Ch 5 (Ch 4-)  5  24  ADC Ch 6 (Ch 6+)
ADC Ch 7 (Ch 6-)  6  25  GND

GND 7 26 DAC0

DAC1 8 27 DAC2
DAC3 9 28 GND

COMMON 8-15 10 29 ADC Ch 8 (Ch 8+)

ADC Ch 9 (Ch 8-) 11 30 ADC Ch 10 (Ch 10+)

ADC Ch 11 (Ch 10-)  12  31  ADC Ch 12 (Ch 12+)
ADC Ch 13 (Ch 12-)  13  32  ADC Ch 14 (Ch 14+)
ADC Ch 15 (Ch 14-)  14  33  GND

GND  15  34  GND
GND  16  35  GND
GND  17  36  GND

DIO1 18 37 DIO0

Digital GND 19

Pin’s 1 through 9 connect to ADC Sequencer #0

Pin’s 11 through 19 connect to ADC Sequencer #1

For customers needing deeper integration the on-card connector is
a 40-pin latching Molex 501190-4017 connector. The mating
connector is the Molex 501189-4010.

40-Pin latching wire-to-board connector

S.E. Signal (Diff)

Assignment

ADC Ch 0 (Ch 0+) 1

DIO 0

ADC Ch 1 (Ch 0-) 3

DIO 1

ADC Ch 2 (Ch 2+) 5

GND

ADC Ch 3 (Ch 2-) 7

GND

ADC Ch 4 (Ch 4+) 9