CyberResearch UCERB 24 User Manual

Digital I/O

UCERB 24

USB Electromechanical Relay

Module - 24 SPDT (Form C)

Relays, with 24 Screw Terminals

USER’S MANUAL

VER. 4 • MAY 2005

No part of this manual may be reproduced without permission

CyberResearch®,Inc.

www.cyberresearch.com

25 Business Park Dr., Branford, CT 06405 USA

®

203-483-8815 (9am to 5pm EST) FAX: [phone]

CyberResearch® Digital I/O UCERB 24

©Copyright 2005

All Rights Reserved.

May 1, 2005

The information in this document is subject to change without prior notice
in order to improve reliability, design, and function and does not represent
a commitment on the part of CyberResearch, Inc.

In no event will CyberResearch, Inc. be liable for direct, indirect, special,
incidental, or consequential damages arising out of the use of or inability
to use the product or documentation, even if advised of the possibility of
such damages.

This document contains proprietary information protected by copyright.
All rights are reserved. No part of this manual may be reproduced by any
mechanical, electronic, or other means in any form without prior written
permission of CyberResearch, Inc.

Trademarks

“CyberResearch,” and “UCERB 24,” are trademarks of CyberResearch, Inc.
Other product names mentioned herein are used for identification
purposes only and may be trademarks and/or registered trademarks of
their respective companies.

• NOTICE •

CyberResearch, Inc. does not authorize any CyberResearch product for
use in life support systems, medical equipment, and/or medical devices
without the written approval of the President of CyberResearch, Inc. Life
support devices and systems are devices or systems which are intended
for surgical implantation into the body, or to support or sustain life and
whose failure to perform can be reasonably expected to result in injury.
Other medical equipment includes devices used for monitoring, data
acquisition, modification, or notification purposes in relation to life
support, life sustaining, or vital statistic recording. CyberResearch
products are not designed with the components required, are not subject
to the testing required, and are not submitted to the certification required
to ensure a level of reliability appropriate for the treatment and diagnosis of
humans.

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Intentionally Blank

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CyberResearch® Digital I/O UCERB 24

Preface About this User’s Guide..........................................................................................1

What you will learn from this user’s guide..........................................................................1

Conventions in this user’s guide..........................................................................................1

Chapter 1

Introducing the UCERB 24......................................................................................2

Overview: UCERB 24 features................................................................................2

USB-ERB24 block diagram.....................................................................................3

Software features .....................................................................................................3

Connecting a USB-ERB24 to your computer is easy..............................................4

Chapter 2

Installing the USB ERB24.......................................................................................5

What comes with your USB-ERB24 shipment?......................................................5

Hardware..................................................................................................................5

Software...................................................................................................................5

Unpacking the UCERB 24.......................................................................................6

Installing the UCERB 24.........................................................................................6

Configuring the hardware switches ........................................................................6

Connecting the external power supply ....................................................................7

Connecting the UCERB 24 to your system ............................................................8

Installing the software..............................................................................................9

Chapter 3

Functional Details..................................................................................................14

Internal components...............................................................................................14

USB in connector...................................................................................................14

USB out connector.................................................................................................14

External power connectors.....................................................................................14

USB LED...............................................................................................................15

PWR LED..............................................................................................................15

Invert/non-invert switch (S1).................................................................................15

Pull-up/pull-down switch (S2)...............................................................................16

Screw terminals......................................................................................................16

Daisy chaining additional relays to the UCERB 24...............................................16

Power limitations using multiple UCERB 24 Devices..........................................17

Voltage drop...........................................................................................................17

Relay configuration................................................................................................17

Relay contact protection circuit for inductive loads..............................................18

Chapter 4

Specifications.........................................................................................................19

Output specifications .............................................................................................19

Power .....................................................................................................................20

External power input..............................................................................................20

External power output............................................................................................20

USB specifications.................................................................................................21

Relay contact pull-up/down option........................................................................21

Mechanical.............................................................................................................21

Environmental........................................................................................................21

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vi ©Copyright 2005 CyberResearch, Inc.

CyberResearch® Digital I/O UCERB 24

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 UCERB 24 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.

<#:#>

bold text Bold indicates names of objects on the screen, such as buttons, text boxes, and check boxes.

italic text

Angle brackets that enclose numbers separated by a colon signify a range of numbers, such as
those assigned to registers, bit settings, etc.

For example:

1. Insert the disk or CD and click the OK button.

Italic text indicates the names of manuals and help topic titles, and to emphasize a word or
phrase. For example:
 Never touch the exposed pins or circuit connections on the board.

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Chapter 1

Introducing the UCERB 24

Overview: UCERB 24 features

This user's guide contains all of the information you need to connect the UCERB 24 to your computer
and to the external devices you want to control. You can use the UCERB 24 in your control applications
to switch on and off a variety of devices, such as fans, blowers, pumps, etc.

The UCERB 24 is a USB 2.0 full-speed, electromechanical relay module. It is supported under
Microsoft

The UCERB 24 has 24 single-pole double-throw (SPDT) Form C electromechanical relays. The digital
I/O lines on your USB module directly control the relays on your UCERB 24.

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 can configure the logic polarity and power-on state of each bank of relays with on-board switches.
The relays are configurable as two banks of eight and two banks of four. Switch settings can be read back
with software.

The UCERB 24 is powered by an external 9 V, 3 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 boards 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.

®

Windows® 98 (2nd edition), Windows ME, Windows 2000, and Windows XP.

The UCERB 24 is shipped in a rugged enclosure that you can mount on a DIN rail or on a bench.

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UCERB 24 block diagram

UCERB 24 functions are illustrated in the block diagram shown here.

Screw terminal

NOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC CNOCNC C

500 mA

USB 2.0

compliant

interface

Switch S1

(inv/non-inv)

Relay

Relay
driver

driver

9.0 V

External

Power

Relay

Relay
driver

Power

driver

Monitor

Power

Regulator

USB

Microcontroller

Switch S2

(pull-up/down)

Relay

Relay
driver

driver

Relay

Relay
driver

driver

Figure 1-1. UCERB 24 functional block diagram

Relay 24

Relay 23

4

4

8

8

Relay 22

Relay 21

Relay 20

Relay 19

Relay 18

Relay 17

Relay 16

Relay 15

Relay 14

Relay 13

Relay 12

Relay 11

Relay 10

Relay 9

Relay 8

Relay 7

Relay 6

Relay 5

Relay 4

Relay 3

Relay 2

Relay 1

242322212019181716151413121110987654321

Software features

The InstaCal installation, calibration, and test utility software ships with the UCERB 24 free of charge.

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Connecting a UCERB 24 to your computer is easy

Installing a data acquisition device has never been easier.

 The UCERB 24 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 UCERB 24. No third-party device driver is required.

 You can connect the UCERB 24 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.

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Installing the UCERB 24

What comes with your UCERB 24 shipment?

The following items are shipped with the UCERB 24.

Hardware

The following items should be included with your shipment.

 UCERB 24

Chapter 2

 External power supply and cord – 9 volt, 3 amp DC power supply

 USB cable (2 meter length)

Software

The CyberResearch Software CD contains the :

 InstaCal installation, calibration, and test utility
 Universal Driver Library
 Universal LabView Drivers

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Unpacking the UCERB 24

As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the UCERB 24 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 UCERB 24 is damaged, notify CyberResearch, Inc. immediately by phone, fax, or e-mail.

 Phone: [phone].
 Fax: [phone] to the attention of Tech Support
 Email: [e-mail]

Installing the UCERB 24

The UCERB 24 has two on-board switches that you set to configure the relay logic polarity and the
resistor pull-up/down configuration. Configure these switches before you connect the external power
supply to the UCERB 24. Factory-configured default settings are listed in Table 2-1. Refer to Figure 3.1
for the location of each switch on the UCERB 24.

Configuring the hardware switches

.

The UCERB 24 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 Table 2.1 Refer to Figure 3.1 for

the
the location of each switch on the UCERB 24.

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.

Non-invert

Pull-down

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Each DIP switch sets the configuration of one relay group. The DIP switch labeled A configures relays 1
to 8, the switch labeled B configures relays 9 to 16, the switch labeled CL configures relays 17 to 20, and
the switch labeled

CH configures relays 21 to 24 ( ). Figure 2-2

Configures 9-16relays
Configures relays17-20

Configures relays21-24

Figure 2-2. Typical board switch

A
B
CL
CH

Port A consists of relays 1 through 8, Port B consists of relays 9 through 16, Port CL consists of relays 17
through 20, and Port CH consists of relays 21 through 24.

Remove from the enclosure to access the on-board switches

To change the configuration of a switch, you must first remove the UCERB 24 from the enclosure.

Relay control logic polarity

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

A
B

S1

Figure 2-3. Relay logic switch S1

CL
CH

 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 . Switch settings can be read back via software through the USB bus. Figure 2-4

PULL UPPULL DOWN

A
B

S2

Figure 2-4. Resistor pull-up/down switch S2

CL
CH

 PULL-UP: the relays are put into an energized state at power-up, regardless of the state of switch S1

PULL-DOWN: the relays are put into a non-energized state at power-up.



Connecting the external power supply

Power to the UCERB 24 is provided with the 9 V, 3 A external power supply. You must connect the
the external power supply before connecting the USB connector to the UCERB 24.

To connect the power supply to your UCERB 24, do the following:

1.

Connect the external power cord to the power connector labeled POWER IN on the UCERB 24
enclosure (

2.

Plug the AC adapter into a power outlet.

PWR IN on the board). Refer to for the location of this connector. Figure 3-1

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The PWR LED illuminates green when 9 V power is supplied to the UCERB 24. If the voltage supply is
less than 6.0 V or more than 12.5 V, the PWR LED does not light.

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 products. If you connect the external power supply to the POWER OUT connector,
the UCERB 24 does not receive power, and the

PWR LED will not illuminate.

Connecting the UCERB 24 to your system

To connect the UCERB 24 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 UCERB 24.

When you connect the UCERB 24 for the first time, a Found New Hardware popup balloon (Windows
XP) or dialog (other Windows versions) opens as the UCERB 24 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 UCERB 24 and your computer.

If you are running Windows XP and connect the UCERB 24 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 UCERB 24 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 UCERB 24, or you may lose data and/or your ability to communicate with the UCERB

24.

If the LED turns off

If the LED is lit but then turns off, the computer has lost communication with the UCERB 24. 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.

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Installing the software

 Turn your computer on if it is not already running.

 Log onto Windows with administrative privileges.

 Make sure you are using the latest system software. Download and install the latest Microsoft

Windows updates

 Make sure you have XP Hotfix KB822603 installed. This update is intended to address a serious

error in Usbport.sys when you operate a USB device.

 Run Windows Update or download the update from

www.microsoft.com/downloads/details.aspx?familyid=733dd867-56a0-4956-b7fe­e85b688b7f86&displaylang=en. For more information, refer to the Microsoft Knowledge Base

article "Availability of the Windows XP SP1 USB 1.1 and 2.0 update." This article is available at

.

support.microsoft.com/?kbid=822603

1. Close all applications you have running, including anti-virus software.

2. Insert the CyberResearch Software CD into your CD drive and let autorun.

Choose whether or not to install the .NET Framework 1.1

If the .NET Framework 1.1 is already installed on your computer, proceed to the Install the DAQ
Software section.

If the .NET Framework 1.1 is not installed on your computer, the following DAQ install information
dialog opens.

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1. Click on the OK button.
The Microsoft .NET Framework 1.1 Setup di al og opens.

2. The button you click depends on whether or not you want to install the .NET Framework 1.1
on your computer.

 To install the .NET Framework 1.1, click on the Yes button.
 To bypass installing the .NET Framework 1.1, click on the No button.

We strongly recommend that you install the Microsoft .NET Framework 1.1

The DAQ software installer program and some DAQ software components require that the .NET

Framework 1.1 package be installed. If you do not install the .NET Framework 1.1, you may not
be able to properly install the DAQ software.

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Install the DAQ Software

Whether or not you install the.NET Framework 1.1, the remaining dialogs are the same, starting with
the Welcome… dialog.

1. Click on the Next > button.

2. The Installation Information dialog opens.

3. Read the information on this dialog. If a warning dialog opens during this installation askin g
to allow scripts to run, click the appropriate option that allows them to run.

4. Click on the Next > button.

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5. Read the license agreement. If you agree with the terms, click on the I accept the terms of this
license agreement option, and then click on the Next > button.

The Ready to install the programs dialog opens.

6. Click on the Install button.

The Installing DAQ Software dialog opens, and stays open while the software installs.

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Restart your computer

When the software is installed, the Setup Completed dialog opens.

If VS .NET is not detected during installation
If Visual Studio .NET is not detected, the Setup Completed dialog instructs you to install VS .NET.

Installing UL or UL for LabVIEW?
If you are going to install the Universal Library or Universal Library for LabVIEW, you can install
either of the packages before you restart.

Unpack and install your USB device after your computer restarts.

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Functional Details

Internal components

The UCERB 24 has the following internal components, as shown in Figure 3-1.

 Two (2) USB connectors
 Two (2) external power connectors
 USB LED
 PWR LED
 Invert/non-invert switch (S1) — sets the relay control logic polarity
 Pull-up/down switch (S2) — sets the relay power-on state
 Screw terminals

USB IN

POWER IN

POWER

USB

OUT

OUT

Invert/non-invert

switch (S1)

Pull-up/pull-down

switch (S2)

Chapter 3

PWR LED

USB LED

Screw terminals

Figure 3-1. UCERB 24 components

USB in connector

The USB out connector is labeled USB IN on the board and enclosure.

The USB IN 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, USB 2.0 devices.

USB out connector

The USB out connector is labeled USB OUT on the board and enclosure.

USB OUT connector is a downstream hub output port intended for use with other CyberResearch

The
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 CyberResearch products, refer to Daisy chaining

additional modules to the USB-ERB08.

External power connectors

The UCERB 24 has two external power connectors labeled POWER IN and POWER OUT on the
enclosure. The
connector is labeled PWR OUT and P20 on the board.

POWER IN connector is labeled PWR IN and P19 on the board, and the POWER OUT

Connect the
required to operate the UCERB 24. The

POWER IN connector to the supplied +9 V external power supply. External power is

POWER OUT connector lets you power additional daisy

chained 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 UCERB 24 devices"
for more information.

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USB LED

The USB LED indicates the communication status of the UCERB 24. It uses up to 5 mA of current and
cannot be disabled. Ta explains the USB LED function. ble 3-2

Table 3-2. USB LED Illumination

USB LED
illumination

Steady green The UCERB 24 is connected to a computer or external USB hub.

Pulsing green

Indication

Initial communication is established between the UCERB 24 and the computer, or data is
being transferred.

PWR LED

The UCERB 24 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.

Table 3-3

explains the function of the PWR LED.

Table 3-3. PWR LED Illumination

PWR LED
illumination

Steady green External power is supplied to the UCERB 24.

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 non­inverted. By default, switch S1 is configured for non-invert (see ). Figure 3-2

NON-INVERTINVERT

A
B
CL

S1

Figure 3-2. Switch S1 default configuration

The switch labeled A configures relays 1 through 8, the switch labeled B configures relays 9 through 16,
the switch labeled

CH configures relays 17 through 20, the switch labeled CL configures relays 21

through 24.

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.

CH

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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

A
B

S2

Figure 3-3. Switch S2 default configuration

CL
CH

The switch labeled A configures relays 1 through 8, the switch labeled B configures relays 9 through 16,
the switch labeled CH configures relays 17 through 20, the switch labeled CL configures relays 21
through 24.



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 UCERB 24 board's 24 sets of screw terminals.
Each relay has a normally closed (NC), common (C), and normally open (NO) contact. F shows
the screw terminals on a typical relay channel.

igure 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 UCERB 24, and

make sure that the signal wires do not contain live voltages.

Use 12-22 AWG wire for your signal connections. Properly insulate the wires to avoid any short circuit to
the other channels, 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 UCERB 24

Daisy chained CyberResearch products connect to the USB bus through the high-speed hub on
the UCERB 24. You can daisy chain a maximum of four CyberResearch products to a single
USB 2.0 port or USB 1.1 port on your computer.

Other CyberResearch 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 CyberResearch products.

Use full-speed cables for daisy chaining to additional products.

To daisy chain two or more UCERB 24 relay boards, follow the steps below. This procedure assumes
you already have one UCERB 24 connected to a computer and to an external power source. The UCERB 24
already connected to the computer is referred to as the connected module. The UCERB 24 you
want to daisy chain to the connected board is referred to as the new module.

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CyberResearch® Digital I/O UCERB 24

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
module.

3.

To add another module, repeat steps 1-2, with the module you just connected now being the
connected module.

USB OUT connector on the connected module to the USB IN connector on the new

A daisy chain example is shown in . Note that the last board in the chain is supplied with

Figure 3-5

external power.

UCERB 24 power supply

to POWER IN

USB port to
USB IN

Figure 3-5. Daisy chain connections

USB OUT
to USB IN

POWER OUT to
POWER IN

USB OUT
to USB IN

CB - PWR

to

-

9V3A supply

POWER IN

Power limitations using multiple UCERB 24 devices

When daisy chaining additional CyberResearch products to the UCERB 24, you must ensure
that you provide adequate power to each board that you connect. The UCERB 24 is powered with a
9 VDC nominal, 3.0 A external power supply.

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.

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

NO NC

Digital output
from the user

Buffer/

driver

10 k
resistor

Pull-up/pull-down

switch S2

C

Figure 3-6. Relay configuration

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+5
GND

Screw
terminals
(3 per
relay)

UCERB 24 CyberResearch® Digital I/O

The relay contacts associated that are with each relay location are listed in . Table 3-4

Table 3-4. Relay locations and associated contacts

R35, R36, R41, R43, R45, R47, R49, R51, R87, R89,
R91, R93, R96, R98, R100, R102, R103, R105, R107,
R109, R112, R114, R116, R118

R37, R40, R42,R44, R46, R48, R50, R52, R88, R90, R92,
R94, R95, R97, R99, R101, R104, R106, R108, R110,
R111, R113, R115, R117

Relays NO contact pull-up (to USB +5 V) / pull-down,
user installed.

Relays NC contact pull-up (to USB +5 V) / pull-down,
user installed

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 Fi . For AC loads, install a metal oxide varistor
(MOV).

Relay

C

+

V

-

Figure 3-7. Relay contact protection circuit

gure 3-7

Inductive

Load

NO

NC

Kickback

Diode

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CyberResearch® Digital I/O UCERB 24

Specifications

Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.

Output specifications

Table 4-1. Output specifications

Number of relays 24

Relay configuration 2 banks of 8 and 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

Power on
state

Relay control logic
polarity

Pull-up / pull-down

S2 =
pull-up

S2 =
pull­down

24 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)

Energized. NO in contact with Common

Not energized. NC in contact to Common

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

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UCERB 24 CyberResearch® Digital I/O

Power

Table 4-2. 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) 9 V ±10% @ 3 A

V

Voltage supervisor limits - PWR
LED

External power consumption

< 6.0 V

ext

6.0 V < V

All relays on, 100 mA downstream hub
power

All relays off, 100 mA downstream hub
power

> 12.5 V

, Vext

< 12.5 V PWR LED = On

ext

PWR LED = Off
(power fault)

1.5 A typ, 1.8 A max

230 mA typ, 270 mA max

External power input

Table 4-3. External power input specifications

Parameter Conditions Specification

External power input

Voltage supervisor limits - PWR LED
(Note 1)

External power adapter (included)

Note 1: The UCERB 24 monitors the external +9 V power supply voltage with a voltage

6.0 V > V

12.5 V

6.0 V < V

or V

ext

ext

>

ext

< 12.5 V PWR LED = On

+6.0 VDC to 12.5 VDC (9 VDC power supply
included).

PWR LED = Off (power fault)

+9 V ±10%, @ 3 A

supervisory circuit. If this power supply exceeds its specified limit, the PWR LED will turn
off indicating a power fault condition.

External power output

Table 4-4. External power output specifications

Parameter Conditions Specification

External power output - current
range

External power output (Note 2)

Compatible cable(s) for daisy
chain

Note 2: The daisy chain power output option allows multiple 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.

4.0 A max.

Voltage drop between power input and daisy chain power
output

C-MAPWR-x

0.5 V max

x = 2 , 3 or 6
feet

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CyberResearch® Digital I/O UCERB 24

USB specifications

Table 4-5. 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 Other UCERB products

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 4-6. Relay pull-up/pull-down specifications

R35, R36, R41, R43, R45, R47, R49, R51, R87, R89, R91, R93, R96,
R98, R100, R102, R103, R105, R107, R109, R112, R114, R116, R118

R37, R40, R42,R44, R46, R48, R50, R52, R88, R90, R92, R94, R95,
R97, R99, R101, R104, R106, R108, R110, R111, R113, R115, R117

Relays NO contact pull-up (to USB +5
V) / pull-down, user installed.

Relays NC contact pull-up (to USB +5
V) / pull-down, user installed

Mechanical

Table 4-7. Mechanical specifications

Card dimensions

431.8 mm (L) x 121 mm (W) x 20.3 mm (H)

17.0" (L) x 4.8" (W) x 0.8" (H)

436.9 mm (L) x 132.1 mm (W) x 40.6 mm (H) Enclosure dimensions

17.2" (L) x 5.2" (W) x 1.6" (H)

Environmental

Table 4-8. 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 4-9. Main connector specifications

Connector type Screw terminal

Wire gauge range 12 to 22 AWG

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UCERB 24 CyberResearch® Digital I/O

Screw terminal pin out

Table 4-10. 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
9-NC Relay 9 Normally Closed contact
9-C Relay 9 Common contact
9-NO Relay 9 Normally Open contact
10-NC Relay 10 Normally Closed contact
10-C Relay 10 Common contact
10-NO Relay 10 Normally Open contact
11-NC Relay 11 Normally Closed contact
11-C Relay 11 Common contact
11-NO Relay 11 Normally Open contact
12-NC Relay 12 Normally Closed contact
12-C Relay 12 Common contact
12-NO Relay 12 Normally Open contact
13-NC Relay 13 Normally Closed contact
13-C Relay 13 Common contact
13-NO Relay 13 Normally Open contact
14-NC Relay 14 Normally Closed contact
14-C Relay 14 Common contact
14-NO Relay 14 Normally Open contact
15-NC Relay 15 Normally Closed contact
15-C Relay 15 Common contact
15-NO Relay 15 Normally Open contact
16-NC Relay 16 Normally Closed contact
16-C Relay 16 Common contact
16-NO Relay 16 Normally Open contact
17-NC Relay 17 Normally Closed contact
17-C Relay 17 Common contact
17-NO Relay 17 Normally Open contact
18-NC Relay 18 Normally Closed contact
18-C Relay 18 Common contact
18-NO Relay 18 Normally Open contact
19-NC Relay 19 Normally Closed contact
19-C Relay 19 Common contact
19-NO Relay 19 Normally Open contact
20-NC Relay 20 Normally Closed contact
20-C Relay 20 Common contact
20-NO Relay 20 Normally Open contact
21-NC Relay 21 Normally Closed contact
21-C Relay 21 Common contact
21-NO Relay 21 Normally Open contact

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CyberResearch® Digital I/O UCERB 24

Pin Signal Name

22-NC Relay 22 Normally Closed contact
22-C Relay 22 Common contact
22-NO Relay 22 Normally Open contact
23-NC Relay 23 Normally Closed contact
23-C Relay 23 Common contact
23-NO Relay 23 Normally Open contact
24-NC Relay 24 Normally Closed contact
24-C Relay 24 Common contact
24-NO Relay 24 Normally Open contact

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UCERB 24 CyberResearch® Digital I/O

24 ©Copyright 2005 CyberResearch, Inc.

CyberResearch® Digital I/O UCERB 24

Product Service

Diagnosis and Debug

CyberResearch, Inc. maintains technical support lines staffed by experienced
Applications Engineers and Technicians. There is no charge to call and we will
return your call promptly if it is received while our lines are busy. Most problems
encountered with data acquisition products can be solved over the phone. Signal
connections and programming are the two most common sources of difficulty.
CyberResearch support personnel can help you solve these problems, especially
if you are prepared for the call.

To ensure your call’s overall success and expediency:

1) Have the phone close to the PC so you can conveniently and quickly take
action that the Applications Engineer might suggest.

2) Be prepared to open your PC, remove boards, report back-switch or
jumper settings, and possibly change settings before reinstalling the
modules.

3) Have a volt meter handy to take measurements of the signals you are
trying to measure as well as the signals on the board, module, or power
supply.

4) Isolate problem areas that are not working as you expected.

5) Have the source code to the program you are having trouble with available
so that preceding and prerequisite modes can be referenced and
discussed.

6) Have the manual at hand. Also have the product’s utility disks and any
other relevant disks nearby so programs and version numbers can be
checked.

Preparation will facilitate the diagnosis procedure, save you time, and avoid
repeated calls. Here are a few preliminary actions you can take before you call
which may solve some of the more common problems:

1) Check the PC-bus power and any power supply signals.

2) Check the voltage level of the signal between SIGNAL HIGH and SIGNAL
LOW, or SIGNAL+ and SIGNAL– . It CANNOT exceed the full scale range
of the board.

3) Check the other boards in your PC or modules on the network for address
and interrupt conflicts.

4) Refer to the example programs as a baseline for comparing code.

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UCERB 24 CyberResearch® Digital I/O

Intentionally Blank

26 ©Copyright 2005 CyberResearch, Inc.

CyberResearch® Digital I/O UCERB 24

Warranty Notice

CyberResearch, Inc. warrants that this equipment as furnished will be free from
defects in material and workmanship for a period of one year from the confirmed
date of purchase by the original buyer and that upon written notice of any such
defect, CyberResearch, Inc. will, at its option, repair or replace the defective item
under the terms of this warranty, subject to the provisions and specific exclusions
listed herein.

This warranty shall not apply to equipment that has been previously repaired or
altered outside our plant in any way which may, in the judgment of the manufacturer,
affect its reliability. Nor will it apply if the equipment has been used in a manner
exceeding or inconsistent with its specifications or if the serial number has been
removed.

CyberResearch, Inc. does not assume any liability for consequential damages as a
result from our products uses, and in any event our liability shall not exceed the
original selling price of the equipment.

The equipment warranty shall constitute the sole and exclusive remedy of any Buyer
of Seller equipment and the sole and exclusive liability of the Seller, its successors
or assigns, in connection with equipment purchased and in lieu of all other
warranties expressed implied or statutory, including, but not limited to, any implied
warranty of merchant ability or fitness and all other obligations or liabilities of seller,
its successors or assigns.

The equipment must be returned postage prepaid. Package it securely and insure it.
You will be charged for parts and labor if the warranty period has expired.

Returns and RMAs

If a CyberResearch product has been diagnosed as being non-functional, is visibly
damaged, or must be returned for any other reason, please call for an assigned
RMA number. The RMA number is a key piece of information that lets us track and
process returned merchandise with the fastest possible turnaround time.

PLEASE CALL FOR AN RMA NUMBER!

Packages returned without an RMA number will be refused!

In most cases, a returned package will be refused at the receiving dock if its
contents are not known. The RMA number allows us to reference the history of
returned products and determine if they are meeting your application’s requirements.
When you call customer service for your RMA number, you will be asked to provide
information about the product you are returning, your address, and a contact person
at your organization.

Please make sure that the RMA number is prominently

displayed on the outside of the box.

• Thank You •

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UCERB 24 CyberResearch® Digital I/O

Intentionally Blank

28 ©Copyright 2005 CyberResearch, Inc.

CyberResearch, Inc.

25 Business Park Drive

Branford, CT 06405 USA

P: [phone]; F: [phone]

www.cyberresearch.com