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USB-3102
User Manual
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Measurement USB-3102 User Manual

USB-2527
Multifunction Measurement and Control
User's Guide
Document Revision 6, January, 2011
© Copyright 2011, Measurement Computing Corporation
Your new Measurement Computing product comes with a fantastic extra —
Management committed to your satisfaction!
Thank you for choosing a Measurement Computing product—and congratulations! You own the finest, and you can now enjoy the protection of the most comprehensive warranties and unmatched phone tech support. It’s the embodiment of our mission:
To provide data acquisition hardware and software that will save time and save money.
Simple installations minimize the time between setting up your system and actually making measurements. We offer quick and simple access to outstanding live FREE technical support to help integrate MCC products into a DAQ system.
Limited Lifetime Warranty: Most MCC products are covered by a limited lifetime warranty against defects in materials or workmanship for the life of the product, to the original purchaser, unless otherwise noted. Any products found to be defective in material or workmanship will be repaired, replaced with same or similar device, or refunded at MCC’s discretion. For specific information, please refer to the terms and conditions of sale.
Harsh Environment Program: Any Measurement Computing product that is damaged due to misuse, or any reason, may be eligible for replacement with the same or similar device for 50% of the current list price. I/O boards face some harsh environments, some harsher than the boards are designed to withstand. Contact MCC to determine your product’s eligibility for this program.
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fitness for a particular application. The remedies provided herein are the buyer’s sole and exclusive remedies. Neither
Measurement Computing Corporation, nor its employees shall be liable for any direct or indirect, special, incidental or consequential damage arising from the use of its products, even if Measurement Computing Corporation has been notified in advance of the possibility of such damages.
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Notice
Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for use in life support systems and/or devices without prior written consent from Measurement Computing Corporation. Life support devices/systems are devices or systems which, a) are intended for surgical implantation into the body, or b) support or sustain life and whose failure to perform can be reasonably expected to result in injury. Measurement Computing Corporation products are not designed with the components required, and are not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of people.
Table of Contents
Preface
About this User's Guide ....................................................................................................................... 6
What you will learn from this user's guide ......................................................................................................... 6
Conventions in this user's guide ......................................................................................................................... 6
Where to find more information ......................................................................................................................... 6
Chapter 1
Introducing the USB-2527 .................................................................................................................... 7
Overview: USB-2527 features ............................................................................................................................ 7
Software features ................................................................................................................................................ 7
Chapter 2
Installing the USB-2527 ........................................................................................................................ 8
What comes with your USB-2527 shipment? ..................................................................................................... 8
Hardware .......................................................................................................................................................................... 8
Optional components ........................................................................................................................................................ 8
Signal conditioning accessories ........................................................................................................................................ 9
Additional documentation ................................................................................................................................................. 9
Unpacking the USB-2527 ................................................................................................................................... 9
Installing the software ........................................................................................................................................ 9
Installing the USB-2527 ................................................................................................................................... 10
Configuring the hardware ................................................................................................................................. 10
Connecting the board for I/O operations .......................................................................................................... 11
Connectors, cables – main I/O connector .........................................................................................................................11
68-pin SCSI connector differential and single-ended pin outs (P5) .................................................................................12
TB-100 terminal board connector to SCSI connector pin out ..........................................................................................14
40-pin header connector pin outs .....................................................................................................................................15
Four-channel TC terminal pin out (TB7) .........................................................................................................................19
Cabling ............................................................................................................................................................. 20
Field wiring and signal termination .................................................................................................................................21
Using multiple USB-2527s per PC ................................................................................................................... 21
Chapter 3
Functional Details ............................................................................................................................... 22
USB-2527 components ..................................................................................................................................... 22
USB-2527 block diagram ................................................................................................................................. 24
Synchronous I/O – mixing analog, digital, and counter scanning .................................................................... 25
Analog input ..................................................................................................................................................... 25
Analog input scanning .....................................................................................................................................................25
Thermocouple input .......................................................................................................................................... 28
Tips for making accurate temperature measurements ......................................................................................................28
Analog output ................................................................................................................................................... 29
Digital I/O ......................................................................................................................................................... 30
Digital input scanning ......................................................................................................................................................30
Digital outputs and pattern generation .............................................................................................................................31
Triggering ......................................................................................................................................................... 31
Hardware analog triggering .............................................................................................................................................31
Digital triggering..............................................................................................................................................................31
Software-based triggering ................................................................................................................................................32
Stop trigger modes ...........................................................................................................................................................32
Pre-triggering and post-triggering modes ........................................................................................................................32
4
USB-2527 User's Guide
Counter inputs .................................................................................................................................................. 33
Mapped channels .............................................................................................................................................................33
Counter modes .................................................................................................................................................................34
Debounce modes ..............................................................................................................................................................35
Encoder mode ..................................................................................................................................................................38
Timer outputs .................................................................................................................................................... 42
Example: Timer outputs ................................................................................................ ...................................................42
Using detection setpoints for output control ..................................................................................................... 42
What are detection setpoints? ..........................................................................................................................................42
Setpoint configuration overview ......................................................................................................................................43
Setpoint configuration ......................................................................................................................................................44
Using the setpoint status register......................................................................................................................................45
Examples of control outputs ............................................................................................................................................45
Detection setpoint details .................................................................................................................................................49
FIRSTPORTC, DAC, or timer update latency .................................................................................................................50
Mechanical drawing ......................................................................................................................................... 51
Chapter 4
Calibrating the USB-2527 ................................................................................................................... 52
Chapter 5
Specifications ...................................................................................................................................... 53
Analog input ..................................................................................................................................................... 53
Accuracy ..........................................................................................................................................................................53
Thermocouples ................................................................................................................................................................54
Analog outputs .................................................................................................................................................. 54
Digital input/output........................................................................................................................................... 55
Counters ............................................................................................................................................................ 55
Input sequencer ................................................................................................................................................. 56
Trigger sources and modes ............................................................................................................................... 57
Frequency/pulse generators .............................................................................................................................. 57
Power consumption .......................................................................................................................................... 57
External power .................................................................................................................................................. 58
USB specifications ........................................................................................................................................... 58
Environmental .................................................................................................................................................. 58
Mechanical ....................................................................................................................................................... 58
Signal I/O connectors and pin out .................................................................................................................... 58
68-pin SCSI connector pin outs .......................................................................................................................................59
40-pin header connector pin outs .....................................................................................................................................60
TC connector pin out (TB7) .............................................................................................................................................63
5

About this User's Guide

What you will learn from this user's guide

This user's guide describes the Measurement Computing USB-2527 data acquisition device and lists the specifications.

Conventions in this user's guide

For more information on …
Text presented in a box signifies additional information and helpful hints related to the subject matter you are reading.
Caution! Shaded caution statements present information to help you avoid injuring yourself and others,
damaging your hardware, or losing your data.
bold text Bold text is used for the names of objects on a screen, such as buttons, text boxes, and check boxes.

Preface

italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.

Where to find more information

For additional information relevant to the operation of your hardware, refer to the Documents subdirectory where you installed the MCC DAQ software (C:\Program Files\Measurement Computing\DAQ by default), or search for your device on our website at www.mccdaq.com.
6
Chapter 1

Introducing the USB-2527

Overview: USB-2527 features

The USB-2527 is supported under popular Microsoft® Windows® operating systems. The USB-2527 board is a multifunction measurement and control board designed for the USB bus.
The USB-2527 provides either eight differential or 16 single-ended analog inputs with 16-bit resolution from its 40-pin connectors. It offers seven software-selectable analog input ranges of ±10 V, ±5 V, ±2 V, ±1 V, ±0.5 V, ±0.2 V, and ±0.1V.
You can configure up to four of the analog inputs as differential thermocouple (TC) inputs.
The USB-2527 also has four 16-bit, 1 MHz analog output channels with an output range of -10 V to +10 V.
The board has 24 high-speed lines of digital I/O, two timer outputs, and four 32-bit counters. It provides up to 4 MHz scanning on all digital input lines1.
You can operate all analog I/O, digital I/O, and counter/timer I/O synchronously.

Software features

For information on the features of InstaCal and the other software included with your USB-2527, refer to the Quick Start Guide that shipped with your device.
1
Higher rates—up to 12 MHz—are possible depending on the platform and the amount of data being transferred.
7

Installing the USB-2527

What comes with your USB-2527 shipment?

As you unpack your USB-2527, verify that the following components are included.

Hardware

USB-2527 (with seven standoffs)
Chapter 2
USB cable (2-meter length)

Optional components

Cables and signal conditioning accessories that are compatible with the USB-2527 are not included with USB­2527 orders, and must be ordered separately.
If you ordered any of the following products with your board, they should be included with your shipment.
8
USB-2527 User's Guide Installing the USB-2527
CA-68-3R
CA-68-3S (3-feet)
CA-68-6S (6-feet)
C40FF-x
PS-9V1AEPS-2500 power supply
Cables

Signal conditioning accessories

MCC provides signal termination products for use with the USB-2527. Refer to the "Field wiring and signal
termination" section for a complete list of compatible accessory products.

Additional documentation

In addition to this hardware user's guide, you should also receive the Quick Start Guide (available in PDF at
www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf). This booklet supplies a brief description of
the software you received with your USB-2527 and information regarding installation of that software. Please read this booklet completely before installing any software or hardware.

Unpacking the USB-2527

As with any electronic device, you should take care while handling to avoid damage from static electricity. Before removing the USB-2527 from its packaging, ground yourself using a wrist strap or by simply touching the computer chassis or other grounded object to eliminate any stored static charge.
If any components are missing or damaged, notify Measurement Computing Corporation immediately by phone, fax, or e-mail:
Phone: 508-946-5100 and follow the instructions for reaching Tech Support. Fax: 508-946-9500 to the attention of Tech Support Email: techsupport@mccdaq.com

Installing the software

Refer to the Quick Start Guide for instructions on installing the software on the Measurement Computing Data Acquisition Software CD. This booklet is available in PDF at www.mccdaq.com/PDFmanuals/DAQ-Software-
Quick-Start.pdf.
We recommend that you download the latest Windows Update onto your computer before installing and operating the USB-2527.
9
USB-2527 User's Guide Installing the USB-2527
The standoff at this location connects to the USB­2527’s internal chassis plane for shunting
The standoff at this location connects to the USB chassis for shunting electrostatic discharge.

Installing the USB-2527

To connect the USB-2527 to your system, turn your computer on, and connect the USB cable to a USB port on your computer or to an external USB hub that is connected to your computer. The USB cable provides power and communication to the USB-2527.
When you connect the USB-2527 to a computer for the first time, a Found New Hardware dialog opens when the operating system detects the device. When the dialog closes, the installation is complete.
The power LED (bottom LED) blinks during device detection and initialization, and then remains solid as long as the USB-2527 has sufficient power. If the power provided from the USB is not sufficient, the LED turns off, indicating you need a PS-9V1AEPS-2500 power supply.
When the board is first powered on, there is usually a momentary delay before the power LED begins to blink, or come on solid.
Connect external power, if used, before connecting the USB cable to the computer
If you are using a PS-9V1AEPS-2500 power supply, connect the external power cable to the USB-2527 before connecting the USB cable to the computer. This allows the USB-2527 to inform the host computer (when the USB cable is connected) that the board requires minimal power from the computer’s USB port.
In general, all standoffs should be used to mount the board to a metal frame.
Caution! Do not disconnect any device from the USB bus while the computer is communicating with the

Configuring the hardware

All hardware configuration options on the USB-2527 are software-controlled. You can select some of the configuration options using InstaCal, such as the analog input configuration (16 single-ended or 8 differential channels), and the edge used for pacing when using an external clock. Once selected, any program that uses the Universal Library initializes the hardware according to these selections.
You need a PS-9V1AEPS-2500 power supply (sold separately) when there is insufficient power from the USB port. However, you can use this power supply in any scenario.
USB-2527, or you may lose data and/or your ability to communicate with the USB-2527.
10
USB-2527 User's Guide Installing the USB-2527
Parameter
Specification
Connector type Main connector: 68-pin standard "SCSI type III" female connector
Auxiliary connectors: Four, 40-pin header connectors
Compatible cables — main connector
CA-68-3R — 68-pin ribbon cable; 3 feet. CA-68-3S — 68-pin shielded round cable; 3 feet. CA-68-6S — 68-pin shielded round cable; 6 feet
Compatible cables — 40-pin connectors
C40FF-x
Compatible accessory products using the CA-68-3R, CA-68-3S, or CA-68-6S cables
TB-100 terminal connector
Compatible accessory products using the C40FF-x cable
CIO-MINI40
Caution! Avoid redundant connections. Ensure there is no signal conflict between SCSI pins and the
associated header pin (J5, J7, and J8). Also make sure there is no conflict between theTB7 TC connections and the SCSI and/or the 40-pin header connections.
Failure to do so could possibly cause equipment damage and/or personal injury.
Also, turn off power to all devices connected to the system before making connections. Electrical shock or damage to equipment can result even under low-voltage conditions.
Information on signal connections
General information regarding signal connection and configuration is available in the Guide to Signal Connections. This document is available on our web site at www.mccdaq.com/signals/signals.pdf.
Caution! Always handle components carefully, and never touch connector pins or circuit components unless
you are following ESD guidelines in an appropriate ESD-controlled area. These guidelines include using properly-grounded mats and wrist straps, ESD bags and cartons, and related procedures.
Avoid touching board surfaces and onboard components. Only handle boards by their edges. Make sure the USB-2527 does not come into contact with foreign elements such as oils, water, and industrial particulate.
The discharge of static electricity can damage some electronic components. Semiconductor devices are especially susceptible to ESD damage.

Connecting the board for I/O operations

Connectors, cables – main I/O connector

The following table lists the board connectors, applicable cables, and compatible accessory products for the USB-2527.
Board connectors, cables, and compatible hardware
11
USB-2527 User's Guide Installing the USB-2527
Signal name
Pin Pin
Signal name
ACH0
68
34
ACH8
AGND
67
33
ACH1
ACH9
66
32
AGND
ACH2
65
31
ACH10
AGND
64
30
ACH3
ACH11
63
29
AGND
SGND
62
28
ACH4
ACH12
61
27
AGND
ACH5
60
26
ACH13
AGND
59
25
ACH6
ACH14
58
24
AGND
ACH7
57
23
ACH15
XDAC3
56
22
XDAC0
XDAC2
55
21
XDAC1
NEGREF (reserved for self-calibration)
54
20
POSREF (reserved for self-calibration)
GND
53
19
+5 V
A1
52
18
A0
A3
51
17
A2
A5
50
16
A4
A7
49
15
A6
B1
48
14
B0
B3
47
13
B2
B5
46
12
B4
B7
45
11
B6
C1
44
10
C0
C3
43
9
C2
C5
42
8
C4
C7
41
7
C6
GND
40
6
TTL TRG
CNT1
39
5
CNT0
CNT3
38
4
CNT2
TMR1
37
3
TMR0
GND
36
2
XAPCR
GND
35
1
XDPCR

68-pin SCSI connector differential and single-ended pin outs (P5)

The 68-pin SCSI connector—labeled P5 on the board—provides 16 single-ended analog channels or eight differential analog channels.
Caution! Avoid redundant connections. Make sure there is no signal conflict among the SCSI pins, the 40-
pin header connector pins (J5, J7, and J8), and the TB7 TC connections. Failure to do so could possibly cause equipment damage and/or personal injury.
68-pin SCSI connector pin out (labeled P5 on the board)
16-channel single-ended mode
12
USB-2527 User's Guide Installing the USB-2527
Signal name
Pin Pin
Signal name
ACH0 HI
68
34
ACH0 LO
AGND
67
33
ACH1 HI
ACH1 LO
66
32
AGND
ACH2 HI
65
31
ACH2 LO
AGND
64
30
ACH3 HI
ACH3 LO
63
29
AGND
SGND
62
28
ACH4 HI
ACH4 LO
61
27
AGND
ACH5 HI
60
26
ACH5 LO
AGND
59
25
ACH6 HI
ACH6 LO
58
24
AGND
ACH7 HI
57
23
ACH7 LO
XDAC3
56
22
XDAC0
XDAC2
55
21
XDAC1
NEGREF (reserved for self-calibration)
54
20
POSREF (reserved for self-calibration)
GND
53
19
+5 V
A1
52
18
A0
A3
51
17
A2
A5
50
16
A4
A7
49
15
A6
B1
48
14
B0
B3
47
13
B2
B5
46
12
B4
B7
45
11
B6
C1
44
10
C0
C3
43
9
C2
C5
42
8
C4
C7
41
7
C6
GND
40
6
TTL TRG
CNT1
39
5
CNT0
CNT3
38
4
CNT2
TMR1
37
3
TMR0
GND
36
2
XAPCR
GND
35
1
XDPCR
68-pin SCSI connector pin out (labeled P5 on the board)
8-channel differential mode
13
USB-2527 User's Guide Installing the USB-2527
TB2 screw terminals
SCSI pin
TB1 screw terminal
SCSI pin
+5V
19
ACH0 (ACH0 HI)
68
GND
*
ACH8 (ACH0 LO)
34
A0
18
AGND
**
A1
52
ACH1 (ACH1 HI)
33
A2
17
ACH9 (ACH1 LO)
66
A3
51
AGND
**
A4
16
ACH2 (ACH2 HI)
65
A5
50
ACH10 (ACH2 LO)
31
A6
15
AGND
**
A7
49
ACH3 (ACH3 HI)
30
B0
14
ACH11 (ACH3 LO)
63
B1
48
AGND
**
B2
13
ACH4 (ACH4 HI)
28
B3
47
ACH12 (ACH4 LO)
61
B4
12
AGND
**
B5
46
ACH5 (ACH5 HI)
60
B6
11
ACH13 (ACH5 LO)
26
B7
45
AGND
**
C0
10
ACH6 (ACH6 HI)
25
C1
44
ACH14 (ACH6 LO)
58
C2
9
AGND
**
C3
43
ACH7 (ACH7 HI)
57
C4
8
ACH15 (ACH7 LO)
23
C5
42
XDAC3
56
C6
7
SGND
62
C7
41
POSREF (reserved for self-calibration)
20
TTL TRG
6
XDAC2
55
GND
*
NEGREF (reserved for self-calibration)
54
CNT0
5
AGND
**
CNT1
39
XDAC0
22
CNT2
4
AGND
**
CNT3
38
XDAC1
21
TMR0
3
AGND
**
TMR1
37
XAPCR
2
XDPCR
1
GND
**
GND
*
EGND
†

TB-100 terminal board connector to SCSI connector pin out

SCSI connector pin out assignments for TB-7 terminal board connector
(differential analog signals in parentheses)
* Digital common ground pins on the SCSI connector are: 35, 36, and 40.
** Analog common ground pins on the SCSI connector are: 24, 27, 29, 32, 59, 64, and 67.
† EGND is connected to the SCSI connector shell.
14
USB-2527 User's Guide Installing the USB-2527
This edge of the header is closest to the center of the USB-
2527. Pins 2 and 40 are labeled on the board silkscreen.
Analog channel
Pin
J5
Pin
Analog channel
NC
1 2
NC
NC
3 4
NC
AGND
5 6
AGND
ACH3
7 8
ACH11
ACH2
9 10
ACH10
NC
11 12
NC
NC
13 14
NC
ACH1
15 16
ACH9
ACH0
17 18
ACH8
AGND
19 20
AGND
NC
21 22
NC
NC
23 24
NC
ACH7
25 26
ACH15
ACH6
27 28
ACH14
AGND
29 30
NC
NC
31 32
NC
NC
33 34
ACH5
ACH13
35 36
ACH4
ACH12
37 38
AGND
AGND
39 40
AGND

40-pin header connector pin outs

Analog channels pin out (J5 and J6)
40-pin header connector pinout (labeled J5)
16-channel single-ended mode
15
USB-2527 User's Guide Installing the USB-2527
Analog channel
Pin
J5
Pin
Analog channel
NC
1 2
NC
NC
3 4
NC
AGND
5 6
AGND
ACH3 HI
7 8
ACH3 LO
ACH2 HI
9 10
ACH2 LO
NC
11 12
NC
NC
13 14
NC
ACH1 HI
15 16
ACH1 LO
ACH0 HI
17 18
ACH0 LO
AGND
19 20
AGND
NC
21 22
NC
NC
23 24
NC
ACH7 HI
25 26
ACH7 LO
ACH6 HI
27 28
ACH6 LO
AGND
29 30
NC
NC
31 32
NC
NC
33 34
ACH5 HI
ACH5 LO
35 36
ACH4 HI
ACH4 LO
37 38
AGND
AGND
39 40
AGND
40-pin header connector pinout (labeled J5)
8-channel differential mode
16
USB-2527 User's Guide Installing the USB-2527
Analog channel
Pin
J6
Pin
Analog channel
NC
1 2
NC
NC
3 4
NC
AGND
5 6
NC
NC
7 8
NC
NC
9 10
NC
AGND
11 12
NC
NC
13 14
NC
NC
15 16
NC
NC
17 18
AGND
NC
19 20
NC
NC
21 22
NC
NC
23 24
AGND
NC
25 26
NC
NC
27 28
NC
AGND
29 30
NC
NC
31 32
NC
NC
33 34
NC
NC
35 36
NC
NC
37 38
AGND
AGND
39 40
AGND
40-pin header connector pinout (labeled J6)
17
USB-2527 User's Guide Installing the USB-2527
Digital channel
Pin
J7
Pin
Digital channel
Signal
Pin
J8
Pin
Signal
GND
1 2
XAPCR +13 V
1 2
-13 V
A0
3 4
A4
NC
3 4
NC
A1
5 6
A5 AGND
5 6
AGND
A2
7 8
A6 XDAC0
7 8
XDAC2
A3
9 10
A7 XDAC1
9 10
XDAC3
GND
11 12
TTL TRG AGND
11 12
AGND
B0
13 14
B4 SelfCal
13 14
SGND
B1
15 16
B5 AGND
15 16
AGND
B2
17 18
B6 TTL TRG
17 18
XDPCR
B3
19 20
B7 XAPCR
19 20
GND (digital)
GND
21 22
+5 V GND (digital)
21 22
GND (digital)
C0
23 24
C4
NC
23 24
NC
C1
25 26
C5 +5 V
25 26
AUX PWR
C2
27 28
C6
NC
27 28
NC
C3
29 30
C7
NC
29 30
NC
GND
31 32
TMR1 NC
31 32
NC
TMR0
33 34
CNT1 NC
33 34
NC
CNT0
35 36
CNT3 NC
35 36
NC
CNT2
37 38
GND NC
37 38
NC
GND
39 40
GND NC
39 40
NC
Digital ports, counters, timers, DACs, triggers, and pacer clocks pin out (J7 and J8)
You can use the 40-pin connector headers labeled J7 and J8 to connect digital ports, counters, timers, DACs, triggers, pacer clocks, and other signals.
USB-2527 40-pin header connectors pin out (labeled J7 and J8)
18
USB-2527 User's Guide Installing the USB-2527
40-pin female connectors
C40FF-x header cables
USB cable
AGND
ACH0 +
ACH8 (-)
ACH1 +
ACH9 (-)
ACH2 +
ACH10 (-)
ACH3 +
ACH11 (-)
TC CH 3
TC CH 2
TC CH 1
TC CH 0
Standoff
Using C40FF-x cables to obtain 40-pin female connectors
In this example, a C40FF-x cable is connected to three of the 40-pin headers (J5, J7, and J8). The result is three female 40-pin connectors that together have the same signal connectivity as the SCSI connector.
Figure 1. Three C40FF-x cables connected to J5, J7, and J8 40-pin connectors
In all scenarios, a USB cable (MCC p/n CA-USB2.0) is used to connect the USB-2527 to a USB port on the host PC.

Four-channel TC terminal pin out (TB7)

You can use the TB7 terminal block to connect up to four thermocouples. The first TC channel uses ACH0 (analog channel 0) for its positive (+) lead, and ACH8 for its negative (-) lead. The second TC channel uses ACH1 and ACH9, and so on, as indicated in Figure 2.
Figure 2. TC terminal pin out (labeled TB7)
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USB-2527 User's Guide Installing the USB-2527
The stripe
identifies pin # 1
6834
351
68
35
34
1
6834
1 35
34
1
68
35
The red stripe
identifies pin # 1
40-pin Female
IDC Connector
1
2
39
40
40-pin Female
IDC Connector
1
2
39
40

Cabling

Use a CA-68-3R 68-pin ribbon expansion cable (Figure 3), or a CA-68-3S (3-foot) or CA-68-6S (6-foot) 68-pin shielded expansion cable (Figure 4) to connect signals to the USB-2527's 68-pin SCSI connector.
Figure 3. CA-68-3R cable
Figure 4. CA-68-3S and CA-68-6S cable
Use one or more C40FF-x- ribbon cable(s) (Figure 5) to connect signals to one or more of the USB-2527's 40­pin header connectors.
Figure 5. C40FF-x cable
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