USB-ERB08
USB-based 8-Relay Module
User's Guide
Document Revision 6, August, 2006
© Copyright 2006, Measurement Computing Corporation
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HM USB-ERB08.doc
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iii
Table of Contents
Preface
About this User’s Guide ......................................................................................................................vi
What you will learn from this user’s guide........................................................................................................vi
Conventions in this user’s guide........................................................................................................................vi
Where to find more information........................................................................................................................vi
Chapter 1
Introducing the USB-ERB08............................................................................................................. 1-1
Overview: USB-ERB08 features.................................................................................................................... 1-1
USB-ERB08 block diagram ........................................................................................................................... 1-2
Software features............................................................................................................................................ 1-2
Connecting a USB-ERB08 to your computer is easy..................................................................................... 1-2
Chapter 2
Installing the USB-ERB08................................................................................................................. 2-1
What comes with your USB-ERB08 shipment?............................................................................................. 2-1
Hardware ....................................................................................................................................................................... 2-1
Additional documentation.............................................................................................................................................. 2-2
Unpacking the USB-ERB08........................................................................................................................... 2-2
Installing the software .................................................................................................................................... 2-2
Installing the USB-ERB08 ............................................................................................................................. 2-2
Configuring the hardware switches................................................................................................................................ 2-2
Connecting the external power supply........................................................................................................................... 2-3
Connecting the USB-ERB08 to your system................................................................................................................. 2-4
Chapter 3
Functional Details ............................................................................................................................. 3-1
Internal components ....................................................................................................................................... 3-1
USB in connector........................................................................................................................................................... 3-1
USB out connector......................................................................................................................................................... 3-1
External power connectors............................................................................................................................................. 3-2
USB LED....................................................................................................................................................................... 3-2
PWR LED...................................................................................................................................................................... 3-2
Invert/Non-invert switch (S1)........................................................................................................................................ 3-2
Pull-up/Pull-down switch (S2)....................................................................................................................................... 3-3
Screw terminals.............................................................................................................................................................. 3-3
Daisy chaining additional relays to the USB-ERB08..................................................................................... 3-3
Power limitations using multiple USB-ERB08 devices ................................................................................. 3-4
Voltage drop ..................................................................................................................................................................3-4
Relay configuration ........................................................................................................................................ 3-5
Relay contact protection circuit for inductive loads....................................................................................................... 3-5
Chapter 4
Specifications.................................................................................................................................... 4-1
Output specifications ...................................................................................................................................... 4-1
Power.............................................................................................................................................................. 4-1
External power input ...................................................................................................................................... 4-2
External power output .................................................................................................................................... 4-2
USB specifications ......................................................................................................................................... 4-2
Relay contact pull-up/down option................................................................................................................. 4-2
Mechanical ..................................................................................................................................................... 4-3
Environmental ................................................................................................................................................ 4-3
iv
USB-ERB08 User's Guide
Main connector............................................................................................................................................... 4-3
Screw terminal pin out................................................................................................................................................... 4-3
v
Preface
About this User’s Guide
What you will learn from this user’s guide
This user’s guide explains how to install, configure, and use the USB-ERB08 so that you get the most out of its
electromechanical relay features. This user's guide also refers you to related documents available on our web
site, and to technical support resources.
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.
<#:#> Angle brackets that enclose numbers separated by a colon signify a range of numbers, such as those assigned
to registers, bit settings, etc.
bold text Bold text is used for the names of objects on the screen, such as buttons, text boxes, and check boxes. For
example:
1. Insert the disk or CD and click the OK button.
italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase. For
example:
The InstaCal installation procedure is explained in the Quick Start Guide.
Never touch the exposed pins or circuit connections on the board.
Where to find more information
The following electronic documents provide helpful information relevant to the operation of the USB-ERB08.
MCC's Specifications: USB-ERB08 (the PDF version of the Specifications chapter in this guide) is
available on our web site at www.mccdaq.com/pdfs/USB-ERB08.pdf
MCC's Quick Start Guide is available on our web site at
www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf
MCC's Guide to Signal Connections is available on our web site at
www.mccdaq.com/signals/signals.pdf
MCC's Universal Library User's Guide is available on our web site at
www.mccdaq.com/PDFmanuals/sm-ul-user-guide.pdf.
MCC's Universal Library Function Reference is available on our web site at
www.mccdaq.com/PDFmanuals/sm-ul-functions.pdf
MCC's Universal Library for LabVIEW
www.mccdaq.com/PDFmanuals/SM-UL-LabVIEW.pdf
USB-ERB08 User's Guide (this document) is also available on our web site at
www.mccdaq.com/PDFmanuals/USB-ERB08.pdf.
.
™
User’s Guide is available on our web site at
.
.
.
.
vi
Chapter 1
Introducing the USB-ERB08
Overview: USB-ERB08 features
This user's guide contains all of the information you need to connect the USB-ERB08 to your computer and to
the external devices you want to control. You can use the USB-ERB08 in your control applications to switch on
and off a variety of devices, such as fans, blowers, pumps, etc.
The USB-ERB08 is a USB 2.0 full-speed, electromechanical relay module that is supported under popular
Microsoft
The USB-ERB08 provides eight single-pole double-throw (SPDT) Form C electromechanical relays. The
digital I/O lines on your MCC USB Series module directly control the relays on your USB-ERB08.
You connect your field wiring directly to the board's screw terminals. The screw terminals provide three
connections to each relay – normally open (NO), normally closed (NC), and common (C).
You configure the relay control logic polarity and the relay power-on state with on-board switches. The relays
are configurable as two banks of four. Switch settings can be read back with software.
The USB-ERB08 is powered by an external 9 V, 1 A regulated power supply that is shipped with the device. A
USB cable is also included. Power OUT and USB OUT connectors let you power and control multiple MCC
USB Series products from one external power source and one USB port in a daisy chain fashion. Depending on
your load requirement, daisy chained boards may require a separate power supply.
The USB-ERB08 is shipped in a rugged enclosure that you can mount on a DIN rail or on a bench.
®
Windows® operating systems.
1-1
USB-ERB08 User's Guide Introducing the USB-ERB08
USB-ERB08 block diagram
USB-ERB08 functions are illustrated in the block diagram shown here.
9.0 V
External
Power
Power
Monitor
500 mA
USB 2.0
compliant
interface
Regulator
Microcontroller
Switch S1
(inv/non-inv)
Power
USB
Switch S2
(pull-up/down)
Relay
Relay
driver
driver
Relay
Relay
driver
driver
4
4
4
4
Channe l 1 relay
Relay 8
Channe l 2 relay
Relay 7
Channe l 3 relay
Relay 6
Channe l 4 relay
Relay 5
Channe l 5 relay
Relay 4
Channe l 6 relay
Relay 3
Channe l 7 relay
Relay 2
Channe l 8 relay
Relay 3
Screw terminal
NOC
CCCCCC
87654321
NC
NOCNC NOCNCNOCNCNOCNCNOCNCNOCNCNOCNC
Figure 1-1. USB-ERB08 functional block diagram
Software features
For information on the features of InstaCal and the other software included with your USB-ERB08, refer to the
Quick Start Guide that shipped with your device. The Quick Start Guide is also available in PDF at
www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf
.
Load
Load
Check www.mccdaq.com/download.htm
for the latest software version or versions of the software supported
under less commonly used operating systems.
Connecting a USB-ERB08 to your computer is easy
Installing a data acquisition device has never been easier.
The USB-ERB08 relies upon the Microsoft Human Interface Device (HID) class drivers. The HID class
drivers ship with every copy of Windows that is designed to work with USB ports. We use the Microsoft
HID because it is a standard, and its performance delivers full control and maximizes data transfer rates for
your USB-ERB08. No third-party device driver is required.
You can connect the USB-ERB08 before or after you install the software, and without powering down your
computer first. When you connect an HID to your system, your computer automatically detects it and
configures the necessary software. You can connect multiple HID peripherals to your system using a USB
hub.
You can connect your system to various devices using a standard four-wire cable. The USB connector
replaces the serial and parallel port connectors with one standardized plug and port combination.
Data can flow two ways between a computer and peripheral over USB connections.
1-2
Installing the USB-ERB08
What comes with your USB-ERB08 shipment?
The following items are shipped with the USB-ERB08.
Hardware
The following items should be included with your shipment.
USB-ERB08
Chapter 2
External power supply and cord (CB-PWR-9) – 9 volt, 1 amp DC power supply
USB cable (2 meter length)
2-1
USB-ERB08 User's Guide Installing the USB-ERB08
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-SSR08 and information regarding installation of that software. Please
read this booklet completely before installing any software or hardware.
Unpacking the USB-ERB08
As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the USB-ERB08 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 your USB-ERB08 is damaged, notify Measurement Computing Corporation immediately by phone, fax, or email. For international customers, contact your local distributor where you purchased the USB-ERB08.
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.
Installing the USB-ERB08
Before you connect the USB-ERB08 to your computer, configure the hardware and then connect the external
power supply that was shipped with the device.
Configuring the hardware switches
The USB-ERB08 has two on-board switches that you set to configure the relay control logic polarity and relay
power-on state. Factory-configured default settings are listed in Ta . Refer to for the location of
each switch on the USB-ERB08.
Table 2-1. Default switch configuration
Board label Description Default setting
INVERT NON-INVERT
S1
Pull DOWN PULL UP
S2
Configures the relay control logic parity per relay bank for invert or
non-invert logic.
Configures the relay power-on state per relay bank for pull-up or
pull-down.
Each DIP switch sets the configuration of one relay group. The switch labeled CL configures relays 1 through 4,
the switch labeled
CH configures relays 5 through 8.
No function
No function
Configures relays 5-8
Configures relays 1-4
Figure 2-2. Typical board switch
ble 2-1
CH
CL
Figure 3-1
Non-invert
Pull down
Port CL consists of relays 1 through 4, and Port CH consists of relays 5 through 8.
Remove from the enclosure to access the on-board switches
To change the configuration of a switch, you must first remove the USB-ERB08 from the enclosure.
2-2
USB-ERB08 User's Guide Installing the USB-ERB08
Relay control logic parity
Configure the
Invert/non-invert switch (S1) to set the relay control logic polarity for each relay bank for invert
or non-invert. By default, this switch is shipped with all banks configured for non-inverted logic, as shown in
. Figure 2-3
NON-INVERTINVERT
CH
CL
S1
Figure 2-3. Invert/non-invert switch (S1)
NON-INVERT mode: when "0" is written or read back via the USB bus, the relays are not energized.
INVERT mode: when "0" is written or read back via the USB bus, the relays are energized.
Switch settings for polarity can be read back via software through the USB bus. Switch settings for S1 do not
affect the power-on condition.
Relay power-on state
Configure the
Pull-up/pull-down switch (S2) to set the state of each relay bank at power-up. By default, this
product is shipped with the switch for all banks configured for pull-down (relays inactive at power up), as
shown in . Figure 2-4
PULL UPPULL DOWN
CH
CL
S2
Figure 2-4. Pull-up/pull-down switch (S2)
When set to pull-up, the relays are put into an energized state at power-up, regardless of the state of switch S1.
When set to pull-down, the relays are put into a non-energized state at power-up.
Switch settings can be read back via software through the USB bus.
Connecting the external power supply
Power to the USB-ERB08 is provided with the 9 V, 1 A external power supply (CB-PWR-9). You must connect
the external power supply before connecting the USB connector to the USB-ERB08.
To connect the power supply to your USB-ERB08, do the following:
1.
Connect the external power cord to the power connector labeled
(PWR IN on the board). Refer to Fi for the location of this connector. gure 3-1
2.
Plug the AC adapter into a power outlet.
The
PWR LED illuminates green when 9 V power is supplied to the USB-ERB08. If the voltage supply is less
than 6.0 V or more than 12.5 V, the PWR LED does not light.
POWER IN on the USB-ERB08 enclosure
2-3
USB-ERB08 User's Guide Installing the USB-ERB08
Do not connect external power to the POWER OUT connector
The power connector labeled POWER OUT on the enclosure (PWR OUT on the board) is used to provide power
to an additional MCC USB Series product. If you connect the external power supply to the POWER OUT
connector, the USB-ERB08 does not receive power, and the PWR LED will not illuminate.
Connecting the USB-ERB08 to your system
To connect the USB-ERB08 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
communication to the USB-ERB08.
When you connect the USB-ERB08 for the first time, a Found New Hardware popup balloon (Windows XP) or
dialog (other Windows versions) opens as the USB-ERB08 is detected.
When this balloon or dialog closes, the installation is complete. The USB LED should flash and then remain lit.
This indicates that communication is established between the USB-ERB08 and your computer.
If you are running Windows XP and connect the USB-ERB08 to a USB 1.1 port, a balloon displays the message
"Your USB device can perform faster if you connect to a USB 2.0 port." You can ignore this message. The
USB-ERB08 will function properly when connected to a USB 1.1 port.
Caution! Do not disconnect any device from the USB bus while the computer is communicating with the
USB-ERB08, or you may lose data and/or your ability to communicate with the USB-ERB08.
If the LED turns off
If the LED is lit but then turns off, the computer has lost communication with the USB-ERB08. To restore
communication, disconnect the USB cable from the computer, and then reconnect it. This should restore
communication, and the LED should turn back on.
2-4
N
N
Functional Details
Internal components
The USB-ERB08 has the following internal components, as shown in Figure 3-1.
Two (2) USB connectors
Two (2) external power connectors
PWR LED
USB LED
Invert/non-invert switch S1 — sets the relay control logic polarity
Pull-up/pull-down switch S2 — sets the relay power-on state
Screw terminals
USB I
USB
OUT
POWER I
POWER
OUT
Chapter 3
Pull-up/pull-down
switch (S2)
PWR LED
USB LED
Invert/non-invert
switch (S1)
Figure 3-1. USB-ERB08 components
Screw terminals
USB in connector
The USB in connector is labeled USB IN on the board and enclosure. This connector is a USB 2.0 full-speed
input connector that you connect to the USB port on your computer (or USB hub connected to your computer).
This connector supports USB 1.1 and USB 2.0 devices.
USB out connector
The USB out connector is labeled USB OUT on the board and enclosure. This connector is a downstream hub
output port intended for use with other MCC USB Series products only. The USB hub is self-powered, and can
provide 100 mA maximum current at 5 V.
For information on daisy chaining to other MCC USB Series products, refer to Daisy chaining additional
modules to the USB-ERB08 on page 3-3.
3-1
USB-ERB08 User's Guide Functional Details
External power connectors
The USB-ERB08 has two external power connectors labeled POWER IN and POWER OUT on the enclosure.
The POWER IN connector is labeled PWR IN on the board, and the POWER OUT connector is labeled PWR
OUT
on the board.
Connect the POWER IN connector to the supplied +9 V external power supply. External power is required to
operate the USB-ERB08. The POWER OUT connector lets you power additional daisy chained MCC USB
Series products from a single external power supply. Depending on your load requirements, daisy chained
products may require a separate power supply. Refer to "Power limitations using multiple USB-ERB08
devices" on page 3-4 for more information.
USB LED
The USB LED indicates the communication status of the USB-ERB08. It uses up to 5 mA of current and cannot
be disabled. explains the USB LED function. Table 3-2
Table 3-2. USB LED Illumination
USB LED
illumination
Steady green The USB-ERB08 is connected to a computer or external USB hub.
Pulsing green
Indication
Initial communication is established between the USB-ERB08 and the computer, or data is being
transferred.
PWR LED
The USB-ERB08 incorporates an on-board voltage supervisory circuit that monitors the external 9 V power. If
the input voltage falls outside of the specified range, the PWR LED shuts off. explains the function of
Table 3-3
the PWR LED.
Table 3-3. PWR LED Illumination
PWR LED
illumination
Steady green External power is supplied to the USB-ERB08.
Off
Indication
Power is not supplied by the external supply, or a power fault has occurred. A power fault occurs
when the input power falls outside of the specified voltage range of the external supply (6.0 V to
12.5 V).
Invert/Non-invert switch (S1)
The Invert/non-invert switch (S1) sets the relay control logic per relay bank to either inverted or non-inverted.
By default, switch S1 is configured for non-invert (see ). Figure 2-3
NON-INVERTINVERT
CH
CL
S1
Figure 3-2. Switch S1 default configuration
The switch labeled CL configures relays 1 through 4, the switch labeled CH configures relays 5 through 8.
NON-INVERT: when "0" is written or read back via the USB bus, the relays are not energized.
INVERT: when "0" is written or read back via the USB bus, the relays are energized.
Switch settings do not affect the power-on condition. Use InstaCal to read the current logic setting for each
module group.
3-2
USB-ERB08 User's Guide Functional Details
Pull-up/Pull-down switch (S2)
The Pull-up/pull-down switch (S2) sets the power-on state of each relay bank. By default, switch S2 is
configured for pull-down (relays inactive at power-up - see ). Figure 3-3
PULL UPPULL DOWN
CH
CL
S2
Figure 3-3. Switch S2 default configuration
The switch labeled CL configures relays 1 through 4, the switch labeled CH configures relays 5 through 8.
PULL UP: The relay energizes at power-up, regardless of the state of switch S1.
PULL DOWN: The relays are not energized at power-up.
Use InstaCal to read the current power-on state setting for each module group.
Screw terminals
Connect external devices to the relay contacts using the USB-ERB08 board's eight sets of screw terminals. Each
relay has a normally closed (NC), common (C), and normally open (NO) contact. shows the screw
terminals on a typical relay channel.
Figure 3-4
NC C NO
Figure 3-4. Typical relay channel
Each screw terminal is identified with a label on the board and on the underside of the enclosure lid.
Caution! Before connecting wires to the screw terminals, turn off the power to the USB-ERB08, and make
sure that the signal wires do not contain live voltages.
Wire gauge
Use 12 AWG to 22 AWG wire to connect field devices. Properly insulate the wires to avoid any short circuit to
the other connections, ground, or other points on the board.
Caution! Keep the length of stripped wire at a minimum to avoid a short to the enclosure! When
connecting your field wiring to the screw terminals, use the strip gage on the terminal strip, or strip
to 5.5 - 7.0 mm (0.215" to 0.275") long.
Daisy chaining additional relays to the USB-ERB08
Daisy chained MCC USB Series products connect to the USB bus through the high-speed hub on the USBERB08. You can daisy chain a maximum of four MCC USB Series products to a single USB 2.0 port or USB
1.1 port on your computer.
MCC USB Series products are USB 1.1 full-speed devices that provide a signaling bit rate of 12 Mb/s. The
throughput rate is shared by all devices connected to the USB bus. Use the supplied cable or an equivalent cable
when daisy chaining MCC USB Series products.
To daisy chain two or more USB-ERB08 modules, follow the steps below. This procedure assumes you already
have one USB-ERB08 connected to a computer and to an external power source. The USB-ERB08 already
connected to the computer is referred to as the connected module. The USB-ERB08 you want to daisy chain to
the connected module is referred to as the new module.
3-3
USB-ERB08 User's Guide Functional Details
1.
Connect the POWER OUT connector on the connected module to the POWER IN connector on the new
module.
This step is required only if you plan to daisy chain power to another module.
2.
Connect the USB OUT connector on the connected module to the USB IN connector on the new module.
3.
To add another module, repeat steps 1-2, with the module you just connected now being the connected
module.
A daisy chain example is shown in . Note that the last board in the chain is supplied with external
power.
USB port to
USB IN
CB-PWR-9
supply
to POWER IN
Figure 3-5
Figure 3-5. Daisy chain connections
POWER OUT
to POWER IN
USB OUT
to USB IN
USB OUT
to USB IN
CB-PWR-9
supply
to POWER IN
Power limitations using multiple USB-ERB08 devices
When daisy chaining additional MCC USB Series products to the USB-ERB08, you must ensure that you
provide adequate power to each board that you connect. The USB-ERB08 is powered with a 9 VDC nominal,
1.0 A external power supply.
When connecting multiple modules, power supplies with higher current capability, such as the CB PWR-9V3A,
are available from MCC.
Voltage drop
A drop in voltage occurs with each board connected in a daisy chain system. The voltage drop between the
power supply input and the daisy chain output is 0.5 V maximum. Factor in this voltage drop when you
configure a daisy chain system to ensure that at least 6.0 VDC is provided to the last board in the chain.
3-4
USB-ERB08 User's Guide Functional Details
Relay configuration
You can install a pull-up or pull-down resistor at the NO and NC terminals on each relay. Note that the pull-up
resistors are tied to the 5 V power and should be considered when calculating the power budget. The relay
configuration is illustrated in the following schematic.
User-installed
pull-up / pull-down resistor
+5
GND
+5
GND
NO NC
Screw
terminals
(3 per
relay )
Digital output
from the user
Buffer/
driver
10 k
resistor
Pull-up/pull-down
switch S2
C
Figure 3-6. Relay configuration
The relay contacts associated that are with each relay location are listed in . Table 3-4
Table 3-4. Relay locations and associated contacts
R1, R3, R5, R7, R10, R12, R14, R16 Relays NO contact pull-up (to USB +5 V) / pull-down
R2, R4, R6, R8, R9, R11, R13, R15 Relays NC contact pull-up (to USB +5 V) / pull-down
Relay contact protection circuit for inductive loads
When you connect an inductive load to a relay, energy stored in the inductive load can induce a large voltage
surge when you switch the relay. This voltage can severely damage the relay contacts. To limit the voltage
surge across the inductive load in a DC circuit, install a kickback diode across the inductive load. Refer to the
contact protection circuit in F . For AC loads, install a metal oxide varistor (MOV). igure 3-7
Relay
C
NO
NC
+
V
-
Figure 3-7. Relay contact protection circuit
Inductive
Load
3-5
Kickback
Diode
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Output specifications
Table 1. Output specifications
Number of relays 8
Relay configuration 2 banks of 4
Contact configuration
Contact rating 6 A @ 240 VAC or 28 VDC resistive
Contact resistance 100 milliohms max (initial value)
Operate time 10 milliseconds max
Release time 5 milliseconds max
Vibration 10 to 55 Hz (amplitude 1.5 mm)
Shock 10 G (11 milliseconds)
Dielectric isolation (between relay
open contact)
Dielectric isolation (between PCB
output lines)
Life expectancy 10 million mechanical operations, min
S2 = pull-up Energized. NO in contact with Common Power on state
S2 = pull-down Not energized. NC in contact to Common
Relay control logic polarity
Pull-up / pull-down (controls relay
power on state)
8 Form C (SPDT) Normally Open, Normally Closed and Common available at
screw terminals
300 VAC, 50/60 Hz (1 minute)
500VAC, 50/60 Hz (1 minute)
User-configurable per bank via switch S1 for invert or non-invert (default).
Switch settings for polarity can be read back via software through the USB bus.
Switch settings do not affect the power on condition. Non-invert mode: when "0"
is written or read back via the USB bus, relays are not energized. Invert mode:
when "0" is written or read back via the USB bus, relays are energized.
User-configurable per bank via switch S2 for pull-down (default) or pull-up.
Switch settings can be read back via software. Pull-down will put the relays in
non-energized mode on power up. Pull-up will put the relays in energized mode
on power up.
Chapter 4
Power
Table 2. Power specifications
Parameter Conditions Specification
USB +5 V input voltage range 4.75 V min. to 5.25 V max.
USB +5 V supply current All modes of operation 10 mA max
External power supply (required) MCC p/n CB-PWR-9 9 V ±10% @ 1 A
V
External power consumption
< 6.0 V
ext
6.0 V < V
All relays on, 100 mA downstream hub power 750 mA typ, 850 mA max
All relays off, 100 mA downstream hub power 170 mA typ, 200 mA max
> 12.5 V PWR LED = Off (power fault) Voltage supervisor limits - PWR LED
, Vext
< 12.5 V PWR LED = On
ext
4-1
USB-ERB08 User's Guide Specifications
External power input
Table 3. External power input specifications
Parameter Conditions Specification
External power input
Voltage supervisor limits - PWR LED
(Note 1)
External power adapter (included) MCC p/n CB-PWR-9 +9 V ±10%, @ 1 A
Note 1: The USB-ERB08 monitors the external +9 V power supply voltage with a voltage supervisory
6.0 V > Vext or Vext > 12.5 V PWR LED = Off (power fault)
6.0 V < Vext < 12.5 V PWR LED = On
+6.0 VDC to 12.5 VDC (9 VDC
power supply included)
circuit. If this power supply exceeds its specified limit, the PWR LED will turn off indicating a
power fault condition.
External power output
Table 4. External power output specifications
Parameter Conditions Specification
External power output - current range
External power output (Note 2)
Compatible cable(s) for daisy chain C-MAPWR-x x = 2 , 3, or 6 feet
Note 2: The daisy chain power output option allows multiple Measurement Computing USB boards to be
powered from a single external power source in a daisy chain fashion. The voltage drop between
the module power supply input and the daisy chain output is 0.5 V max. Users must plan for this
drop to ensure the last module in the chain will receive at least 6.0 VDC.
Voltage drop between power input and daisy
chain power output
4.0 A max.
0.5 V max
USB specifications
Table 5. USB specifications
USB "B" connector Input
USB device type USB 2.0 (full-speed)
Device compatibility USB 1.1, USB 2.0
USB "A" connector Downstream hub output port
Supports USB 2.0 high-speed, full-speed and low-speed operating points USB hub type
Self-powered, 100 mA max downstream VBUS capability
Compatible products MCC USB Series devices
USB cable type (upstream and downstream)
USB cable length 3 meters max.
A-B cable, UL type AWM 2527 or equivalent.
(min 24 AWG VBUS/GND, min 28 AWG D+/D-)
Relay contact pull-up/down option
Table 6. Relay pull-up/pull-down specifications
R1, R3, R5, R7, R10, R12, R14, R16 Relays NO contact pull-up (to USB +5V) / pull-down
R2, R4, R6, R8, R9, R11, R13, R15 Relays NC contact pull-up (to USB +5V) / pull-down
4-2
USB-ERB08 User's Guide Specifications
Mechanical
Table 7. Mechanical specifications
Card dimensions
203.2 mm (L) x 121 mm (W) x 20.0 mm (H)
8.0" (L) x 4.8" (W) x 0.8" (H)
241.3 mm (L) x 125.7 mm (W) x 58.9 mm (H) Enclosure dimensions
9.50" (L) x 4.95" (W)x 2.32" (H)
Environmental
Table 8. Environmental specifications
Operating temperature range
Storage temperature range -40 to 100 °C
Humidity 0 to 95% non-condensing
0 to 70 °C
Main connector
Table 9. Main connector specifications
Connector type Screw terminal
Wire gauge range 12 to 22 AWG
Screw terminal pin out
Table 10. Screw terminal pin out
Pin Signal Name
1-NC Relay 1 Normally Closed contact
1-C Relay 1 Common contact
1-NO Relay 1 Normally Open contact
2-NC Relay 2 Normally Closed contact
2-C Relay 2 Common contact
2-NO Relay 2 Normally Open contact
3-NC Relay 3 Normally Closed contact
3-C Relay 3 Common contact
3-NO Relay 3 Normally Open contact
4-NC Relay 4 Normally Closed contact
4-C Relay 4 Common contact
4-NO Relay 4 Normally Open contact
5-NC Relay 5 Normally Closed contact
5-C Relay 5 Common contact
5-NO Relay 5 Normally Open contact
6-NC Relay 6 Normally Closed contact
6-C Relay 6 Common contact
6-NO Relay 6 Normally Open contact
7-NC Relay 7 Normally Closed contact
7-C Relay 7 Common contact
7-NO Relay 7 Normally Open contact
8-NC Relay 8 Normally Closed contact
8-C Relay 8 Common contact
8-NO Relay 8 Normally Open contact
4-3
Declaration of Conformity
Manufacturer: surement Computing Corporation Mea
Address: 10 Commerce Way
Suite 1008
Norton, MA 02766
USA
Measurement Computing Corporation declares under sole responsibility that the product
USB-ERB08
to which this declaration relates is in conformity with the relevant provisions of the following standards or other
documents:
EU EMC Directive 89/336/EEC: Electromagnetic Compatibility, EN 61326 (1997) Amendment 1 (1998)
Emissions: Group 1, Class A
EN 55011 (1990)/CISPR 11: Radiated and Conducted emissions.
Immunity: EN61326, Annex A
IEC 1000-4-2 (1995): Electrostatic Discharge immunity, Criteria C.
IEC 1000-4-3 (1995): Radiated Electromagnetic Field immunity Criteria A.
IEC 1000-4-4 (1995): Electric Fast Transient Burst immunity Criteria B.
IEC 1000-4-5 (1995): Surge immunity Criteria A.
IEC 1000-4-6 (1996): Radio Frequency Common Mode immunity Criteria A.
IEC 1000-4-8 (1994): Magnetic Field immunity Criteria A.
IEC 1000-4-11 (1994): Voltage Dip and Interrupt immunity Criteria A.
Declaration of Conformity based on tests conducted by Chomerics Test Services, Woburn, MA 01801, USA in
April, 2005. Test records are outlined in Chomerics Test Report #EMI3931.04.
We hereby declare that the equipment specified conforms to the above Directives and Standards.
Carl Haapaoja, Director of Quality Assurance
Measurement Computing Corporation
10 Commerce Way
Suite 1008
Norton, Massachusetts 02766
(508) 946-5100
Fax: (508) 946-9500
E-mail: info@mccdaq.com
www.mccdaq.com
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