Measurement Computing USB-SSR08 User manual

USB-SSR08
USB-based Solid-State 8 I/O Module Interface Device
User's Guide
October 2018. Rev 7
© Measurement Computing Corporation

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USB-SSR08
Trademark and Copyright Information
Measurement Computing Corporation, InstaCal, Universal Library, and the Measurement Computing logo are
either trademarks or registered trademarks of Measurement Computing Corporation. Refer to the Copyrights &
Trademarks section on mccdaq.com/legal for more information about Measurement Computing trademarks.
Other product and company names mentioned herein are trademarks or trade names of their respective
companies.
© 2018 Measurement Computing Corporation. All rights reserved. No part of this publication may be
reproduced, stored in a retrieval system, or transmitted, in any form by any means, electronic, mechanical, by
photocopying, recording, or otherwise without the prior written permission of Measurement Computing
Corporation.
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 that, 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.

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Table of Contents
Preface
About this User's Guide .......................................................................................................................5
What you will learn from this user's guide .........................................................................................................5
Conventions in this user's guide .........................................................................................................................5
Where to find more information .........................................................................................................................5
Chapter 1
Introducing the USB-SSR08.................................................................................................................6
Compatible SSR modules ...................................................................................................................................6
Functional block diagram ...................................................................................................................................7
Chapter 2
Installing the USB-SSR08.....................................................................................................................8
Unpacking...........................................................................................................................................................8
Installing the software ........................................................................................................................................8
Installing the hardware .......................................................................................................................................8
Configuring the hardware switches................................................................................................................................... 8
Connecting the external power supply.............................................................................................................................10
Connecting the USB-SSR08 to your system....................................................................................................................10
Chapter 3
Functional Details ...............................................................................................................................11
Components ......................................................................................................................................................11
USB in connector.............................................................................................................................................................12
USB out connector...........................................................................................................................................................12
External power connectors...............................................................................................................................................12
USB LED.........................................................................................................................................................................12
PWR LED........................................................................................................................................................................12
I/O module type switch (S1) ............................................................................................................................................13
Control logic polarity switch (S2)....................................................................................................................................13
Relay power-up state switch (S3) ....................................................................................................................................13
Main connector and pin out ..............................................................................................................................13
Module status LEDs .........................................................................................................................................14
Daisy chaining multiple USB-SSR08 devices..................................................................................................14
Power limitations using multiple USB-SSR08 devices ....................................................................................15
Voltage drop ....................................................................................................................................................................15
Mechanical drawings........................................................................................................................................16
Chapter 4
Specifications......................................................................................................................................17
I/O module configuration .................................................................................................................................17
Power ................................................................................................................................................................17
External power input ........................................................................................................................................17
External power output ......................................................................................................................................18
USB specifications ...........................................................................................................................................18
Digital I/O transfer rates ...................................................................................................................................18
Mechanical .......................................................................................................................................................18
Environmental ..................................................................................................................................................19
Main connector.................................................................................................................................................19
Screw terminal pinout......................................................................................................................................................19
EU Declaration of Conformity............................................................................................................20

USB-SSR08 User's Guide
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EU Declaration of Conformity, Legacy Hardware...........................................................................21

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Preface
About this User's Guide
What you will learn from this user's guide
This user's guide describes the Measurement Computing USB-SSR08 data acquisition device and lists device
specifications.
Conventions in this user's guide
For more information
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 is used for the names of objects on a screen, such as buttons, text boxes, and checkboxes.
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
Additional information about the USB-SSR08 is available on our website at www.mccdaq.com. You can also
contact Measurement Computing Corporation by phone, fax, or email with specific questions.
Knowledgebase: kb.mccdaq.com
Tech support form: www.mccdaq.com/support/support_form.aspx
Email: [e-mail]
Phone: [phone] and follow the instructions for reaching Tech Support
For international customers, contact your local distributor. Refer to the International Distributors section on our
website at www.mccdaq.com/International.

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Chapter 1
Introducing the USB-SSR08
The USB-SSR08 is a USB 2.0 full-speed device that provides the following features:
Mounting rack for eight solid state relay (SSR) modules (backplane is divided into two groups of four
modules each).
Onboard switch to configure the module type (input or output) for each module group.
The following configurations are supported (you cannot mix input and output modules within a group):
oFour input and four output modules
oEight input modules
oEight output modules
Onboard switch to configure the control logic polarity (active high or low) for each module group.
Onboard switch to configure the power-up state for output modules.
Switch settings can be read back with software.
Independent LEDs at each module position to indicate the on/off status of each module.
Eight pairs of screw terminal banks for field wiring connections, with positive (+) and negative (-) relay
contacts brought out to the terminals.
USB out and power out connections support powering and controlling multiple MCC USB devices from
one external power source and one USB port in a daisy-chain configuration.*
Rugged enclosure that can mount on a DIN rail or on a bench
The USB-SSR08 is powered by an external 9 V, 1 A regulated power supply that is shipped with the device.
The USB-SSR08 is fully compatible with both USB 1.1 and USB 2.0 ports. Revision F and later devices are
also compatible with USB 3.0 ports.
Compatible SSR modules
The USB-SSR08 has locations for eight solid state relay modules. The SSR modules use a standard color
scheme so you can quickly identify what module type is installed. Mounting screw threads are provided for you
to easily install the SSR modules.
MCC offers the following SSR modules that are compatible with the USB-SSR08:

SSR-IAC-05

SSR-IDC-05

SSR-OAC-05

SSR-ODC-05

SSR-IAC-05A

SSR-IDC-05NP

SSR-OAC-05A

SSR-ODC-05A

SSR-ODC-05R
Details on these SSR modules are available at www.mccdaq.com/products/signal_conditioning.aspx.
Remove the USB-SSR08 from the enclosure to install SSR modules
Remove the USB-SSR08 from the enclosure to access the solid-state relay module mounting positions.
* Depending on your load requirements, daisy chained devices may require a separate power supply.

USB-SSR08 User's Guide Introducing the USB-SSR08
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Functional block diagram
USB-SSR08 functions are illustrated in the block diagram shown here.
Figure 1. USB-SSR08 functional block diagram

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Chapter 2
Installing the USB-SSR08
Unpacking
As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the device 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.
Contact us immediately if any components are missing or damaged.
Installing the software
Refer to the MCC DAQ Quick Start and the USB-SSR08 product page on our website for information about the
software supported by the USB-SSR08.
Install the software before you install your device
The driver needed to run the USB-SSR08 is installed with the software. Therefore, you need to install the
software package you plan to use before you install the hardware.
Installing the hardware
Before you connect the USB-SSR08 to your computer, connect the external power supply that was shipped with
the device.
You can connect up to four compatible MCC USB Series devices in a daisy chain configuration to a single USB
2.0 port on your computer. If your system has a USB 1.1 port, you can connect up to two MCC USB Series
devices.
Configuring the hardware switches
The USB-SSR08 has three onboard switches that configure the I/O module type, relay logic polarity, and relay
power-up state. Configure these switches before you connect the external power supply to the USB-SSR08.
Factory-configured default settings are listed in the table below. Refer to Figure 6 on page 11 for the location of
each switch.
Default switch configuration
PCB label Description Default setting
IN OUT (S1)
Configures the I/O type per module group for input or output.
OUT (output)
NON INVERT INVERT
(S2)
Configures the relay logic parity per module group for invert or
non-invert logic.
NON INVERT
(active low)
P/UP P/DN (S3) Configures the power-up state of output relays for pull-up or
pull-down.
P/UP (Pull-up)
Each DIP switch configures one module group. The switch labeled CL configures modules 1 through 4, and the
switch labeled CH configures modules 5 through 8.
Figure 2. Typical PCB switch
You can use InstaCal to read the current configuration of each switch.

USB-SSR08 User's Guide Installing the USB-SSR08
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Remove from the enclosure to access the onboard switches
To change the configuration of a switch, you must first remove the USB-SSR08 from the enclosure. Turn
external power off before changing the switch settings
I/O module type
Use switch S1 to configure the type of each module group for input or output. By default, switch S1 is shipped
with all banks configured for output modules, as shown in Figure 3.
Figure 3. I/O module type switch (S1)
You cannot mix input and output modules within a group.
Control logic polarity
Configure switch S2 to set the control logic polarity for each module group for inverted (active high) or non-
inverted (active low, default) logic. By default, switch S2 is shipped with all banks configured for non-inverted
logic, as shown in Figure 4.
Figure 4. Relay logic switch (S2)
For input modules, invert mode returns a "1" when the modules are active. Non-invert mode returns a "0"
when the modules are active.
For output modules, invert mode allows you to write a "1" to activate the module. Non-invert mode allows
you to write a "0" to activate the module.
Relay power-up state
Configure switch S3 to set the state of the output relays at power-up. By default, switch S3 is shipped with all
banks configured for pull-up (modules inactive on power-up), as shown in Figure 5. When switched to
PULL DN (pull-down), modules are active on power-up. Switch settings can be read back via software.
Figure 5. Relay power-up state switch (S3)

USB-SSR08 User's Guide Installing the USB-SSR08
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Connecting the external power supply
Power to the USB-SSR08 is provided with the 9 V, 1 A external power supply (CB-PWR-9). Connect the
external power supply before connecting the USB connector to the USB-SSR08.
To connect the power supply to your USB-SSR08, complete the following steps:
1. Connect the external power cord to the power connector labeled POWER IN on the USB-SSR08 enclosure
(PWR IN on the PCB).
2. Plug the AC adapter into a power outlet.
The PWR LED turns on (green) when 9 V power is supplied to the USB-SSR08. If the voltage supply is less
than 6.0 V or more than 12.5 V, the PWR LED does not turn on.
Do not connect external power to the POWER OUT connector
The power connector labeled POWER OUT on the enclosure (PWR OUT on the PCB) is used to provide power
to an additional MCC USB Series device. If you connect the external power supply to the POWER OUT
connector, the USB-SSR08 does not receive power, and the PWR LED does not turn on.
Connecting the USB-SSR08 to your system
To connect the USB-SSR08 to your system, do the following.
1. Turn your computer on.
2. Connect the USB cable to the USB connector labeled USB IN on the USB-SSR08.
3. Connect the other end of the USB cable to a USB port on your computer or to an external USB hub that is
connected to your computer.
Windows finds and installs the device driver automatically, and notifies you that the device is ready to use.
When installation is complete, the USB LED flashes and then remains lit to indicate communication is
established between the USB-SSR08 and the computer. Refer to Figure 6 on page 11 for the location of the
USB LED.
If the USB LED turns off
If communication is lost between the device and the computer, the USB LED turns off. To restore
communication, disconnect the USB cable from the computer and then reconnect it. This should restore
communication, and the USB LED should turn on.
If the system does not detect the USB-SSR08
If a USB device not recognized message displays when you connect the USB-SSR08, complete the following
steps:
1. Unplug the USB cable from the USB-SSR08.
2. Unplug the external power cord from the POWER INconnector on the enclosure.
3. Plug the external power cord back into the POWER IN connector.
4. Plug the USB cable back into the USB-SSR08.
Your system should now properly detect the USB-SSR08.
Contact technical support if your system still does not detect the USB-SSR08.
Caution! Do not disconnect any device from the USB bus while the computer is communicating with the
USB-SSR08, or you may lose data and/or your ability to communicate with the USB-SSR08.