rtd DM5856HR User manual

DM5856HR/DM6856HR
Isolated digital I/O-module
User’s Manual
Hardware Revision 1.0 B

User’s Manual
DM5856HR/DM6856HR 2 RTD Finland Oy
DM5856HR/DM6856HR
ISOLATED DIGITAL I/O-MODULE
User’s Manual
REAL TIME DEVICES FINLAND OY
LEPOLANTIE 14
FIN-00660 HELSINKI
FINLAND
Phone: [phone]
FAX: [phone]
E-Mail
[e-mail]
Website
www.rtdfinland.fi

User’s Manual
DM5856HR/DM6856HR 3 RTD Finland Oy
Revision History
20/05/1998 Release 2.0
22/03/1999 Updated and corrected
01/08/1999 Input optocoupler resistor formula changed
18/02/2000 Figures on pages 14 and 15 updated
14/07/2001 Name of company changed, reformatted
IMPORTANT
Although the information contained herein has been carefully
verified RTD Finland Oy assumes no responsibility for any errors
that may occur, for any damage to property or persons, resulting
from improper use of this manual or from the related software.
RTD Finland Oy also reserves the right to alter the contents of this
manual, as well as features and specifications of this product at
any time, without prior notice.
Notice: We have attempted to verify all information in this manual as of the publication date.
Information in this manual may change without prior notice from RTD Finland Oy.
Published by
Real Time Devices Finland Oy
Lepolantie 14
FIN-00660 Helsinki
Finland
Copyright 1997-2001 Real Time Devices Finland Oy
All rights reserved
Printed in Finland
PC/XT, PC/AT are registered trademarks of IBM Corporation.
PC/104 is a registered trademark of PC/104 Consortium.
The Real Time Devices Logo is a registered trademark of Real Time Devices.
utilityModule is a trademark of Real Time Devices.
All other trademarks appearing in this document are the property of their respective owners

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TABLE OF CONTENTS
LIST OF ILLUSTRATIONS & TABLES.......................................................5
CHAPTER 1 - INTRODUCTION....................................................................6
Features...........................................................................................................................6
Isolated digital iutputs.......................................................................................................6
Isolated digital inputs........................................................................................................6
Mechanical description .....................................................................................................6
Connector description.......................................................................................................6
What comes with your board ............................................................................................7
Board accessories............................................................................................................7
-Application software and drivers
-Hardware accessories
Using this manual.............................................................................................................7
When you need help.........................................................................................................7
CHAPTER 2 - BOARD SETTINGS..............................................................8
Factory-Configured Jumper Settings.................................................................................9
Base Address Jumpers...................................................................................................10
CHAPTER 3 - BOARD INSTALLATION..................................................12
Board installation............................................................................................................12
External I/O connections.................................................................................................14
-Isolated digital input
-Isolated digital outputs
CHAPTER 4 - HARDWARE DESCRIPTION........................................16
Isolated digital inputs......................................................................................................17
Isolated digital outputs....................................................................................................18
CHAPTER 5 - BOARD OPERATION AND PROGRAMMING......19
Defining the I/O map ......................................................................................................19
-Base+0 I/O register 1 (Read/Write)
-Base+1 I/O register 2 (Read/Write)
Programming the DM5856/DM6856................................................................................20
Clearing and setting bits in a port....................................................................................20
Isolated output programming..........................................................................................21
Isolated input programming ............................................................................................21
CHAPTER 6 - DM5856/DM6856 SPECIFICATIONS........................22
CHAPTER 7 - RETURN POLICY & WARRANTY..............................23

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List of Illustrations & Tables
Illustrations
Fig. 2-1: Board layout showing jumper locations
Fig. 3-1: DM5856HR/DM6856HR integrated in a PC/104 dataModule stack
Fig. 3-2: 19” Eurocard rack installation with an integrated PC/104 data
Module and EUROCARD cpuModule computer system
Fig. 3-3: Input connection for Channel number 1
Fig. 3-4: Output connection for Channel number 1
Fig. 4-1: DM5856HR/DM6856HR Block Diagram
Tables
Table 2.1: Factory Jumper settings
Table 2.2: Base Address jumper settings
Table 3.1: Input connection pinouts
Table 5.1: DM5856HR/DM6856HR I/O Map

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Chapter 1
INTRODUCTION
This user’s manual describes the operation of the DM5856HR/DM6856HR Isolated Digital Interface
boards.
Features
Some of the key features of the DM5856HR/DM6856HR include:
•16 channel-by-channel isolated open collector digital outputs, 8mA @ 30V
•16 optocoupler inputs with reverse voltage protection
•Single +5V operation
•RTD IDAN compatible
•XT (DM5856HR) and AT (DM6856HR) boards available
•Support for direct PC/104 interface with RTD dataModules
•PC/104 compliant
The following paragraphs briefly describe the major features of the DM5856HR and DM6856HR. A
more detailed discussion is included in Chapter 3 (Hardware description), and in Chapter 4 (Board
operation and programming). The board set-up is described in Chapter 1 (Board Settings).
Isolated Digital Outputs
16 optocoupler outputs may be used to directly drive loads, such as relays, lamps or to interface to
commonly encountered 24V PLC I/O's. The outputs are driven with an open collector optocoupler
output capable of sinking 8mA at 30V. Each output channel can be connected to a different
potential. The isolated outputs are controlled with a latch structure.
Isolated Digital Inputs
16 optocoupler inputs may be used to connect high voltage signals to a computer. Eight channel-
by-channel isolated input ranges are available. The factory installed input range is +5V, but this
input range may be customized channel-by-channel by changing the input series resistors. The
optocoupler inputs have a reverse voltage protection diode across the input. This enables AC-
connection to the inputs where the input diode acts as a rectifier.
Mechanical description
The DM5856HR is designed on a PC/104 form factor. An easy mechanical interface to both
PC/104 and EUROCARD systems can be achieved. Stack your PC/104 compatible computer
directly on the DM5856HR using the onboard mounting holes.
Connector description
There are two 50-pin digital interface connectors on the DM5856HR/DM6856HR to directly
interface isolated digital I/O signals. Isolated inputs and outputs are connected to the board by 50-
pin flat ribbon cable connectors. Use this type of interface connector with a TB50 screw terminal
block.

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What comes with your board?
Your DM5856HR/DM6856HR package contains the following items:
•DM5856HR/DM6856HR Isolated Digital Interface module
•User's manual
Note: Software and diagnostics programs and WIN95/98/2000/NT 4.0 are available free of
charge on our website www.rtdfinland.fi
If any item is missing or damaged, please call Real Time Devices Finland customer service
department at the following number: ([phone].
Board accessories
In addition to the items included in your DM5856HR delivery, several software and hardware
accessories are available. Contact your distributor for more information and for advice on
selecting the most appropriate accessories to support your instrumentation system.
•Application software and drivers
•Hardware accessories
Real Time Devices can supply a complete set of accessories for your DM5856HR/DM6856HR card.
These include, power supplies, terminal boards (TB50), and other connection systems. The board is
also available in the rugged IDAN enclosure system. Please consult the factory for more details or
visit our websites at www.rtdfinland.fi or www.rtdusa.com.
Using this manual
This manual is intended to help you install your new board and get it working quickly, while also
providing enough detail about the board and it's functions so that you can enjoy maximum use of
it's features even in the most demanding applications.
When you need help
This manual and all the example programs will provide you with enough information to fully utilize
all the features on this board. If you have any problems with installation or use of the board,
contact our Technical Support Department ([phone] during European business hours.
Alternatively, send a FAX to ([phone], or Email to: [e-mail]. When sending a
FAX or Email request please include the following information: Your company's name and address,
your name, your telephone number, and a brief description of the problem.

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Chapter 2
BOARD SETTINGS
The DM5856HR/DM6856HR Isolated digital I/O board has jumper settings which can be changed to suit
your application. It is factory configured with a +5V input range configuration. The factory settings are
listed and shown in the diagram in the beginning of this chapter.

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Factory-Configured Jumper Settings
Table 2-1 below illustrates the factory jumper setting for the DM5856HR/DM6856HR. It also shows
the board layout of the DM5856HR/DM5856HR and the locations of the jumpers. The following
paragraphs explain how to change the factory jumper settings to suit your specific application.
Table 2-1: Factory jumper settings ( see figure 2-1 below for detailed locations)
Jumper name Jumper description Number of Jumpers Factory setting jumpers
installed
Base address Base address 8 300h
Figure 2-1 - Board layout showing jumper locations (Figure shows DM6856HR board)

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Base address Jumpers (Factory setting: 300h)
The most common cause of failure when you are first setting up your module is address contention.
Some of the I/O space of your computer is already occupied by other internal I/O devices and
expansion boards. When the board attempts to use it's own reserved I/O addresses (which are
being already used by another peripheral device), erratic performance may occur and the data read
from the board may be corrupted.
To avoid this problem make sure you set up the base address first using the eight jumpers marked
"BASE ADDRESS”. It allows you to choose from 256 different I/O addresses in your computer I/O
map. Should the factory installed setting of 300h be unusable for your system configuration, you
may change this setting to another using the options illustrated in Table 2-2 (overleaf). The table
shows the switch settings and their corresponding values in hexadecimal values. Ensure that you
verify the correct location of the base address jumpers. When the jumper is removed it
corresponds to a logical "0", connecting the jumper to a "1". When you set the base address of the
module, record the setting inside the back cover of this manual (directly after the Appendices).

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BASE ADDRESS JUMPER SETTINGS FOR DM5856HR/DM6858 BOARDS
Base address
Hex / (Decimal) Jumper Settings 8 7 6 5 4 3 2 1 Base Address Hex / (Decimal) Jumper settings 8 7 6 5 4 3 2 1
200 / (512) 0 0 0 0 0 300 / (768) 1 0 0 0 0
210 / (528) 0 0 0 0 1 310 / (784) 1 0 0 0 1
220 / (544) 0 0 0 1 0 320 / (800) 1 0 0 1 0
230 / (560) 0 0 0 1 1 330 / (816) 1 0 0 1 1
240 / (576) 0 0 1 0 0 340 / (832) 1 0 1 0 0
250 / (592) 0 0 1 0 1 350 / (848) 1 0 1 0 1
260 / (608) 0 0 1 1 0 360 / (864) 1 0 1 1 0
270 / (624) 0 0 1 1 1 370 / (880) 1 0 1 1 1
280 / (640) 0 1 0 0 0 380 / (896) 1 1 0 0 0
290 / (656) 0 1 0 0 1 390 / (912) 1 1 0 0 1
2A0 / (672) 0 1 0 1 0 3A0 / (928) 1 1 0 1 0
2B0 / (688) 0 1 0 1 1 3B0 / (944) 1 1 0 1 1
2C0 / (704) 0 1 1 0 0 3C0 / (960) 1 1 1 0 0
2D0 / (720) 0 1 1 0 1 3D0 / (976) 1 1 1 0 1
2E0 / ( 736) 0 1 1 1 0 3E0 / (922) 1 1 1 1 0
2F0 / (752) 0 1 1 1 1 3F0 / (1008) 1 1 1 1 1
0 = NOT JUMPERED, 1 = JUMPER INSTALLED
Table 2-2: Base Address Jumper settings, factory default Base Address shaded
Note: In the table above only the MSB address decoder jumper settings are illustrated. You may also
connect jumpers 1-3 to decode address lines A1-A3

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Chapter 3
BOARD INSTALLATION
The DM5856HR/DM6856HR Isolated Digital Interface board is very easy to connect to your industrial or
automotive control system. Direct interface to PC/104 systems as well as EUROCARD boards is
possible. This chapter gives step-by-step instructions on how to install the board into your system.
After completing the installation it is recommended that you use the diagnostic software to fully verify that
your board is working.
Board Installation
Keep your board in the antistatic bag until you are ready to install it to your system! When removing it
from the bag, hold the board at the edges and do not touch the components or connectors. Please handle
the board in an antistatic environment and use a grounded workbench for testing and handling of your
hardware. Before installing the board in your computer, check the jumper settings. Chapter 1 reviews the
factory settings and how to alter them. If any alterations are needed, please refer to the appropriate
instructions in this chapter. Do however note that incompatible settings can result in unpredictable board
operation and erratic response.
General installation guidelines:
•Turn OFF the power to your computer
•Touch the grounded metal housing of your computer to discharge any antistatic build-up and then
remove the board from its antistatic bag.
•Hold the board by the edges and install it in an enclosure or place it on the able on an antistatic surface.
•Connect the board to the I/O devices using the twisted pair 50-pin flat cable
Fig. 3-1: DM5856HR/DM6856HR integrated in a PC/104 RTD cpuModule stack

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3U rack or enclosure installation with a EUROCARD CPU with one DM5856HR
The PC/104 system can easily be inserted into a 19" rack installation using the CPU as a "form
factor adapter". Assemble your PC/104 data modules on a RTD single board EUROCARD
computer and install the system in a 19" enclosure. Multiple DM5856HR boards can be easily
connected to this system. See figure 3-2 below.
Fig 3-2: 19” Eurocard rack installation with an integrated PC/104 dataModule and EUROCARD
cpuModule computer system

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External I/O Connections
Table 3-1 below shows the input wire connection pin outs.
PIN number Signal Description PIN number Signal Description
1+ IN1 2- IN1
3 NC 4+ IN2
5- IN2 6 NC
7+ IN3 8- IN3
9 NC 10
+ IN4
11 - IN4 12 NC
13 + IN5 14 - IN5
15 NC 16 + IN6
17 - IN6 18 NC
19 + IN7 20 - IN7
21 NC 22 +IN8
23 - IN8 24 NC
25 + IN9 26 -IN9
27 NC 28 +IN10
29 - IN10 30 NC
31 + IN11 32 -IN11
33 NC 34 +IN12
35 - IN12 36 NC
37 + IN13 38 -IN13
39 NC 40 +IN14
41 - IN14 42 NC
43 + IN15 44 -IN15
45 NC 46 +IN16
47 - IN16 48 NC
49 NC 50 NC
Fig: 3-3: This diagram illustrates the input connection for channel 1

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Table 3-2 below shows the output connection pin outs
Pin number Signal description Pin number Signal Description
1+Vsupply-1 2Out1
3GND-1 4+Vsupply-2
5Out2 6GND-2
7+Vsupply-3 8Out3
9GND-3 10 +Vsupply-4
11 Out4 12 GND-4
13 +Vsupply-5 14 Out5
15 GND-5 16 +Vsupply-6
17 Out6 18 GND-6
19 +Vsupply-7 20 Out7
21 GND-7 22 +Vsupply-8
23 Out8 24 GND-8
25 +Vsupply-9 26 Out9
27 GND-9 28 +Vsupply-10
29 Out10 30 GND-10
31 +Vsupply-11 32 Out11
33 GND-11 34 +Vsupply-12
35 Out12 36 GND-12
37 +Vsupply-13 38 Out13
39 GND-13 40 +Vsupply-14
41 Out14 42 GND-14
43 +Vsupply-15 44 Out15
45 GND-15 46 +Vsupply-16
47 Out16 48 GND-16
49 NC 50 NC
3-4: This diagram illustrates the output connection for channel 1

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Chapter 4
- HARDWARE DESCRIPTION
This chapter describes in detail the two major features of the DM5856HR/DM6856HR: The isolated
optocoupler inputs and the isolated optocoupler outputs.
Fig 4-1: DM5856HR/DM6856HR Block diagram

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Isolated digital inputs
The Isolated output stage of the DM5856HR consists of two major parts:
1. Optocouplers
2. Input latch
1. Optocouplers
Small SMD-optocouplers are used to isolate each channel of the isolated inputs. Individual
optocouplers are used for each channel. The optocouplers are directly connected to the input latch
in an inverting configuration. A reverse voltage protection diode is connected across the
optocoupler input.
The input voltage range can be customized channel-by-channel by changing the input series
resistor. The factory preinstalled input voltage is +5V (or TTL). The threshold voltage is
approximately 3,2 to 3,4V. To customize the input range to a different one, please change the
input resistor. The nominal value of the +5V range input resistor is 1 KOhm.
The forward voltage of the optocoupler is 1,25 - 1,7V. The triggering current is about 1,6mA. This
for example if you require a 24V input range you need to calculate the series resistor as follows:
Nominal input voltage: 24V
Trigger voltage 20V (could be set to something else too)
Forward current at 20V 1,6mA
Diode forward voltage drop 1,7V
Series resistor ????
Formula: (20V-1,7V) / 0.5mA = Rs
=> Rs = 11,43 KOhms (Round to 11K)
The absolute maximum forward current of the optocoupler is 20mA. The
maximum allowed voltage with the factory set +5V range is 18V!
2. Input latch
The inverting optocouplers are connected to two 8-bit data latches that are directly addressable
with a read operation at address BASE+0 and BASE+1.

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Isolated digital outputs
The Isolated input stage of the DM5856HR/DM6856HR consists of two major parts:
1. Optocouplers
2. Output registers
1. Optocouplers
Small SMD-optocouplers are used to isolate each channel of the isolated outputs. Individual
optocouplers are used for each channel. The optocouplers are directly connected to the Output
latch. The output optocoupler transistor is in the open collector configuration with a pull-up resistor,
which is connected to the collector. A 4,7 KOhm resistor is used as a pull-up to the supply. The
output 4.7 Kohm pull-up resistor has been installed for a +5 - 30V isolated output range.
2. Output registers
The optocouplers are connected to two 8-bit data registers, which are directly addressable with a
write operation at address BASE+0 and BASE+1. The state of the outputs does not change even
though a system reset may occur. A write to the output latch will update the state of the outputs.

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Chapter 5
- BOARD OPERATION AND PROGRAMMING
This chapter shows you how to program and use your DM5856HR/DM6856HR: It provides a
complete description of the I/O-map plus a detailed discussion of programming operations to aid
you in programming.
Defining the I/O Map
The I/O map of the DM5856HR/DM6856HR is shown in Table 5-1 below. As shown, the module
occupies two addresses. The Base Address (designated as BA) can be set using the jumpers as
described in Chapter 2 (Board settings). The following sections describe the register contents of
each address used in the I/O map.
Table 5-1: DM5856HR/DM6856HR I/O Map
Register Description Read Function Write Function Address in HEX
Low Byte (ch. 1-8) Digital Inputs 1-8 Digital outputs 1-8 BA+0
High Byte (ch. 9-16) Digital Inputs 9-16 Digital outputs 9-16 BA+1
BA = Base Address
BA+0 Digital Inputs 1-8 (Read)
The optoisolated digital input channels 1-8 can be read from address BA+0.
BA+1 Digital Inputs 9-16 (Read)
The optoisolated digital input channels 9-16 can be read from address BA+1.
BA+0 Digital Outputs (Write)
The Data Output register controls the output optocouplers 1-8. Data is transferred from the Data
register to the outputs by performing an 8-bit write to BA+0. Direct transfer of data to the output
latch for all the 16 bits can be performed by executing a 16-bit write to BA+0. The address decoder
of the DM5856HR will automatically write consecutive addresses BA+0 and BA+1with the correct
output data bytes.
BA+1 Digital Outputs (Write)
The Data Output register controls the output optocouplers 9-16. Data is transferred from the Data
register to the outputs by performing an 8-bit write to BA+1.

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Programming the DM5856HR
This section gives you some general information about programming the DM5856HR board. It then
walks you through the major programming functions of the DM5856HR. This will help you use the
example program that is included with the board. All of the program descriptions use decimal values
unless otherwise specified.
The DM5856HR board is programmed by writing or reading the correct I/O-port address. These I/O
ports were described in the previous section of this chapter. The following example shows how to
perform an 8-bit read and write I/O port addresses using "C"-syntax and assembly code:
Read: Write:
"C"-syntax var = inp(address); outp(address,data);
Assembly mov dx,address mov dx,address
in ax,dx mov ax,data
out dx,ax
8-bit operations must be performed to the DM5856HR/DM6856HR board for correct operation.
Clearing and setting bits in an I/O port
When you clear or set bits in an I/O port you must be careful not to alter the status of other bits.
You can preserve the status of all the bits you do not wish to change by proper use of the bit wise
AND- and OR- operators. Using and /or operators, single or multiple bits can easily be set or
cleared in one-line operations.
1.
To clear a single bit in a port , AND the current value of the port with the value "B",
where B = 255-2(exp) bit.
2.
To set a single bit in a port , OR the current value of the port with the value "B",
where B = 2(exp) bit.
Bits are numbered from 0-7 for the low byte of a word and from 8-15 for the high byte
of a word. Setting and clearing of multiple bits in a bye or word is more complex.
3.
To clear multiple bits in a port, AND the current value of the port with the value "B", where
B = 255 - (the sum of the values of the bits to be cleared). Note that the bits do not have to
be consecutive.
4.
To set multiple bits in a port , OR the current value of the port with the value "B", where
B = (sum of the individual bits to be set).