ESD CAN-CBM-DP/DN-CBM-DP PROFIBUS-DP/CAN Gateway PROFIBUS-DP/DeviceNet Gateway Manuale del proprietario

CAN-CBM-DP / DN-CBM-DP

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

Page 1 of 45

esd electronics gmbh

Vahrenwalder Str. 207 • 30165 Hannover • Germany

http://www.esd.eu

Phone: +49 (0) 511 3 72 98-0 • Fax: +49 (0) 511 3 72 98-68

CAN-CBM-DP

Profibus-DP / CAN-Gateway

DN-CBM-DP

Profibus-DP / DeviceNet-Gateway

Hardware Manual

to Product C.2844.03/.05 and C.2846.02

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

CAN-CBM-DP / DN-CBM-DPPage 2 of 45

N O T E

The information in this document has been carefully checked and is believed to be entirely reliable.

esd makes no warranty of any kind with regard to the material in this document, and assumes no

responsibility for any errors that may appear in this document. In particular descriptions and

technical data specified in this document may not be constituted to be guaranteed product features in

any legal sense.

esd reserves the right to make changes without notice to this, or any of its products, to improve

reliability, performance or design.

All rights to this documentation are reserved by esd. Distribution to third parties and reproduction

of this document in any form, whole or in part, are subject to esd’s written approval.

esd electronics gmbh

Vahrenwalder Str. 207

30165 Hannover

Germany

Phone: +49-511-372 98-0

Fax: +49-511-372 98-68

E-mail: info@esd.eu

Internet: www.esd.eu

This manual contains important information and instructions on safe and efficient

handling of the module. Carefully read this manual before commencing any work and

follow the instructions.

The manual is a product component, please retain it for future use.

Trademark Notices

CiA® and CANopen® are registered community trademarks of CAN in Automation e.V.

PROFIBUS is a registered trademark of PROFIBUS Nutzerorganisation e.V..

DeviceNet

TM

is a trademark of the Open DeviceNet Vendor Association, Inc (ODVA).

All other trademarks, product names, company names or company logos used in this manual are reserved by their

respective owners.

CAN-CBM-DP / DN-CBM-DP

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

Page 3 of 45

Document file: I:\Texte\Doku\MANUALS\CAN\CBM\DP\Englisch\Hardware\CAN-CBM-DP_DN-CBM-DP_Hardwa

re_en_19.wpd

Date of print: 2018-04-16

PCB versions: CPU331 Rev. 1.1

CBM-DP Rev. 1.1

CBMPB Rev. 1.1

Changes in the chapters

The changes in the user’s manual listed below affect changes in the hardware as well as changes in

the description of the facts only.

Version Chapter Changes versus previous version

1.7 1.1 Description of PROFIBUS-DP data range inserted.

1.2 Description of PROFIBUS-DP data range inserted.

1.8

- Safety Instructions and Classification of Warning Messages inserted

1.1, 1.2 Chapter revised

1.3 Note concerning LEDs inserted

2. Chapter “Hardware Installation inserted”

4. Chapter restructured and renamed to “Connector Assignment”

4.1.1 Description of connector inserted

4.4 Safety notes and instructions inserted

4.5 Chapter “Conductor Cross Section”

6. Chapter “Order Information” moved and revised

1.9 3.2 Figure corrected, 100 resistor R126 inserted

4.2 Description of shield potential inserted

Technical details are subject to change without notice.

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

CAN-CBM-DP / DN-CBM-DPPage 4 of 45

Classification of Warning Messages and Safety Instructions

This manual contains noticeable descriptions, warning messages and safety instructions, which you

must follow to avoid personal injuries or death and property damage.

This is the safety alert symbol.

It is used to alert you to potential personal injury hazards. Obey all safety messages and

instructions that follow this symbol to avoid possible injury or death.

DANGER, WARNING, CAUTION

Depending on the hazard level the signal words DANGER, WARNING or CAUTION are used to

highlight safety instructions and warning messages. These messages may also include a warning

relating to property damage.

DANGER

Danger statements indicate a hazardous situation which, if not avoided, will result in

death or serious injury.

WARNING

Warning statements indicate a hazardous situation that, if not avoided, could result in

death or serious injury.

CAUTION

Caution statements indicate a hazardous situation that, if not avoided, could result in

minor or moderate injury.

NOTICE

Notice statements are used to notify people on hazards that could result in things other than personal

injury, like property damage.

NOTICE

This NOTICE statement contains the general mandatory sign and gives information that

must be heeded and complied with for a safe use.

INFORMATION

Notes to point out something important or useful.

CAN-CBM-DP / DN-CBM-DP

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

Page 5 of 45

Safety Instructions

When working with CBM-DP modules follow the instructions below and read the manual

carefully to protect yourself and the CBM-DP module from damage.

Do not use damaged or defective cables to connect the CBM-DP module and follow the CAN

wiring hints in chapter: ”Correct Wiring of Electrically Isolated CAN Networks” .

In case of damages to the device, which might affect safety, appropriate and immediate

measures must be taken, that exclude an endangerment of persons and domestic animals and

property. .

Current circuits which are connected to the device have to be sufficiently protected against

hazardous voltage (SELV according to EN 60950-1).

The CBM-DP module may only be driven by power supply current circuits, that are contact

protected. A power supply, that provides a safety extra-low voltage (SELV or PELV)

according to EN 60950-1, complies with this conditions.

Do not open the housing of the CBM-DP module.

The CBM-DP module has to be securely installed before commissioning.

Never let liquids get inside the CBM-DP module. Otherwise, electric shocks or short circuits

may result.

Protect the CBM-DP module from dust, moisture and steam.

Protect the CBM-DP module from shocks and vibrations.

The CBM-DP module may become warm during normal use. Always allow adequate

ventilation around the CBM-DP module and use care when handling.

Do not operate the CBM-DP module adjacent to heat sources and do not expose it to

unnecessary thermal radiation. Ensure an ambient temperature as specified in the technical

data.

DANGER

Hazardous Voltage - Risk of electric shock due to unintentional contact with

uninsulated live parts with high voltages inside of the system into which the CBM-DP

module is to be integratred.

All current circuits which are connected to the device have to be sufficiently

protected against hazardous voltage (SELV according to EN 60950-1).

Ensure the absence of voltage before starting any electrical work

NOTICE

The CBM-DP-module shall not be connected to a DC power supply network without

protection against surge voltage.

Use an external overvoltage protection.

Qualified Personnel

This documentation is directed exclusively towards qualified personnel in control and automation

engineering. The installation and commissioning of the product may only be carried out by qualified

personnel, which is authorized to put devices, systems and electric circuits into operation according to

the applicable national standards of safety engineering.

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

CAN-CBM-DP / DN-CBM-DPPage 6 of 45

Intended Use

The intended use of the CAN-CBM-DP is the operation as PROFIBUS-DP/CAN-Gateway.

The intended use of the DN-CBM-DP is the operation as PROFIBUS-DP/DN-Gateway

The esd guarantee does not cover damages which result from improper use, usage not in accordance

with regulations or disregard of safety instructions and warnings.

The CBM-DP module is intended for indoor installation only.

The operation of the CBM-DP in hazardous areas, or areas exposed to potentially explosive

materials is not permitted.

The operation of the CBM-DP for medical purposes is prohibited.

Service Note

The CBM-DP does not contain any parts that require maintenance by the user. The CBM-DP does not

require any manual configuration of the hardware. Unauthorized intervention in the device voids

warranty claims.

Remove all cables before cleaning. Clean the device with a lint-free cloth. Cleaning agents or solvents

are not suitable.

Disposal

Devices which have become defective in the long run have to be disposed in an appropriate way or have

to be returned to the manufacturer for proper disposal. Please, make a contribution to environmental

protection.

Typographical Conventions

Throughout this manual the following typographical conventions are used to distinguish technical terms.

Convention Example

File and path names /dev/null or <stdio.h>

Function names open()

Programming constants NULL

Programming data types uint32_t

Variable names Count

Number Representation

All numbers in this document are base 10 unless designated otherwise. Hexadecimal numbers have a prefix of 0x.

For example, 42 is represented as 0x2A in hexadecimal.

Contents

Page

CAN-CBM-DP / DN-CBM-DP

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

Page 7 of 45

1. Overview .................................................................9

1.1 Module Description CAN-CBM-DP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.2 Module Description DN-CBM-DP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.3 Front View with Connectors and Coding Switches . . . . . . . . . . . . . . . . . . . . . . . 11

1.4 Summary of Technical Data.........................................12

1.4.1 General Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.4.2 Microcontroller Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.4.3 CAN/DeviceNet Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.4.4 Profibus-DP Interface...................................14

1.4.5 Serial Interface........................................14

2. Hardware Installation .....................................................15

3. Circuit Description ........................................................16

3.1 CAN/DeviceNet Circuit............................................16

3.1.1 Interface Circuit .......................................16

3.2 Profibus-DP Circuit...............................................18

3.3 Serial Interface ..................................................19

3.3.1 Configuration.........................................19

3.3.2 Connection of Various Serial Interfaces . . . . . . . . . . . . . . . . . . . . . 20

3.4 Function of Coding Switches........................................23

4. Connector Assignments .....................................................24

4.1 CAN/DeviceNet (X400) ...........................................24

4.1.1 CAN-CBM-DP: CAN-Bus (X400, 5-pin Combicon Style) . . . . . . . 24

4.1.2 DN-CBM-DP: DeviceNet (X400, 5-pin Combicon Style) . . . . . . . . 25

4.2 Profibus-DP Interface (X100-CBMPB, 9-pin DSUB female) . . . . . . . . . . . . . . . . 26

4.3 Serial Interface (X100) ............................................27

4.3.1 RS-232 Interface (X100-SIO331, 9-pin DSUB male) . . . . . . . . . . . 27

4.3.2 RS-422 Interface (X100-SIO331, 9-pin DSUB male) . . . . . . . . . . . 29

4.3.3 RS-485 Interface (X100-SIO331, 9-pin DSUB male) . . . . . . . . . . . 30

4.3.4 TTY-passive Interface (X100-SIO331, 9-pin DSUB male) . . . . . . . 31

4.3.5 TTY-active Interface (X100-SIO331, 9-pin DSUB male) . . . . . . . . 32

4.4 Voltage Supply (X101, UEGM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.5 Conductor Connection/Conductor Cross Sections . . . . . . . . . . . . . . . . . . . . . . . . 34

5. Correct Wiring of Electrically Isolated CAN Networks ............................35

5.1 Standards concerning CAN Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.2 Light Industrial Environment (Single Twisted Pair Cable) . . . . . . . . . . . . . . . . . . 36

5.2.1 General Rules.........................................36

5.2.2 Cabling .............................37

5.2.3 Branching............................................37

5.2.4 Termination ..........................................37

5.3 Heavy Industrial Environment (Double Twisted Pair Cable) . . . . . . . . . . . . . . . . . 38

5.3.1 General Rules.........................................38

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

CAN-CBM-DP / DN-CBM-DPPage 8 of 45

5.3.2 Device Cabling........................................39

5.3.3 Branching............................................39

5.3.4 Termination ..........................................39

5.4 Electrical Grounding ..............................................40

5.5 Bus Length .....................................................40

5.6 Examples for CAN Cables..........................................41

5.6.1 Cable for Light Industrial Environment Applications (Two-Wire) . . 41

5.6.2 Cable for Heavy Industrial Environment Applications (Four-Wire)

...............................................41

6. CAN Troubleshooting Guide ................................................42

6.1 Termination ....................................................42

6.2 Electrical Grounding ..............................................43

6.3 Short Circuit in CAN Wiring ........................................43

6.4 CAN_H/CAN_L Voltage ..........................................43

6.5 CAN Transceiver Resistance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.6 Support by esd ..................................................44

7. Order Information .........................................................45

i

Overview

CAN-CBM-DP / DN-CBM-DP

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

Page 9 of 45

1. Overview

This manual describes the hardware of the CAN-interface CAN-CBM-DP and the hardware of the

DeviceNet-interface DN-CBM-DP module together. Differences are noted.

1.1 Module Description CAN-CBM-DP

Figure 1: Block-circuit diagram of the CAN-CBM-DP module

By means of the module CAN-CBM-DP any Profibus-DP master can be connected to a CAN network.

The DP/CAN gateway acts like a slave I/O component on the DP-bus, with a total of up to 300 bytes

input and output data. Maximum 240 bytes of the total of 300 bytes can be used as input data (with 60

byte output data) or maximum 240 bytes can be used as output data (with 60 bytes input data).

The module operates internally with a 68331 micro controller, which buffers the CAN and Profibus DP

data into the local SRAM. The firmware and configuration data are kept in the Flash EEPROM.

Parameters are stored by means of a serial EEPROM.

The ISO 11898-compliant CAN interface allows a maximum data-transfer rate of 1 Mbit/s. The

Profibus-DP slave interface automatically recognizes all usual bit rates up to 12 Mbit/s.The DP interface

as well as the CAN interface are electronically insulated by optocouplers and DC/DC converters. CAN

is connected by means of a 5-pin screw/plug connector in Combicon design. According to standard, the

DP interface is equipped with a 9-pin female DSUB connector.

The CAN-CBM-DP can be configured with a PROFIBUS-tool as for example the SIMATIC Manager

S7 or the TIA Portal.

The module comes with a serial interface (default: RS-232) for servicing and configuration. It is

connected by means of a DSUB9 connector.

i

Overview

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

CAN-CBM-DP / DN-CBM-DPPage 10 of 45

1.2 Module Description DN-CBM-DP

Figure 2: Block-circuit diagram of the DN-CBM-DP module

The module DN-CBM-DP can link any Profibus-DP master to DeviceNet. The DN-CBM-DP gateway

acts like a slave I/O component on the DP-bus, with a total of up to 312 bytes input and output data.

Maximum 244 bytes of the total of 312 bytes can be used as input data (with 68 byte output data) or

maximum 244 bytes can be used as output data (with 68 bytes input data).

The module operates internally with a 68331 micro controller, which buffers the DN and Profibus DP

data into the local SRAM. The firmware and configuration data are kept in the Flash EEPROM.

Parameters are stored by means of a serial EEPROM.

The DeviceNet interface is designed according to the DeviceNet Specification Rev.2.0. All DeviceNet

bit rates are supported.

The Profibus-DP slave interface automatically recognizes all usual bit rates up to 12 Mbit/s. The DP

interface as well as the DeviceNet interface are electronically insulated by optocouplers and DC/DC

converters.

The DeviceNet is connected by means of a 5-pin screw/plug connector in Combicon design. According

to standard, the DP interface is equipped with a 9-pin female DSUB connector.

The DN-CBM-DP can be configured with a PROFIBUS-tool as for example the SIMATIC Manager

S7 or the TIA Portal.

The module has a serial interface (default: RS-232) for servicing and configuration. It is connected by

means of a male DSUB9.

i

Overview

CAN-CBM-DP / DN-CBM-DP

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

Page 11 of 45

1.3 Front View with Connectors and Coding Switches

Figure 3: Position of connectors and control elements

Figure 4: Internal module structure with PCB designations and connector names

(Figure without connector for supply voltage)

INFORMATION

The LEDs are described in detail in the software manuals of the modules.

i

Overview

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

CAN-CBM-DP / DN-CBM-DPPage 12 of 45

1.4 Summary of Technical Data

1.4.1 General Technical Data

Supply voltage

Nominal voltage 24 V/DC ±10%,

Current (at 20°C): max. 125 mA

(+20 mA in TTY operation of serial

interface)

Connectors

X100-SIO331 (DSUB9, male) - serial interface

X100-CBMPB (DSUB9, female) - Profibus-DP-interface

X101 (6-pin screw connector UEGM) -

24V-voltage supply

X400 (Phoenix Contact connector, 5-pin

MSTB2.5/5-5.08) - CAN or DeviceNet

Temperature range 0...50 C ambient temperature

Humidity max. 90%, non-condensing

Case dimensions

(W x H x D)

Width: 40 mm, height: 85 mm, depth: 83 mm

(including hat rail mounting and jutted out connectors DSUB9,

without CAN/DeviceNet connectors)

Weight approx. 200 g

Table 1: General data of the CAN-CBM-DP and DN-CBM-DP

i

Overview

CAN-CBM-DP / DN-CBM-DP

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

Page 13 of 45

1.4.2 Microcontroller Circuit

Microcontroller 68331

Memory SRAM: 128 k x 16 Bit (optional 512 k x 16 Bit)

Flash-EPROM: 128 k x 8 Bit

EEPROM: serial I²C-EEPROM (1024 k x 8 Bit)

Debug interface for service and programming

Table 2: Microcontroller circuit

1.4.3 CAN/DeviceNet Interface

Number of interfaces CAN-CBM-DP: 1 x CAN

DN-CBM-DP: 1 x DeviceNet

Connection 5-pin Phoenix Contact connector MSTB2.5/5-5.08

CAN controller SJA1000,according to ISO 11898-1 (CAN 2.0A/B)

Electrical insulation of CAN

interface from other circuits via optocouplers and DC/DC converters (CAN-CBM-DP)

Physical Layer CAN

(CAN-CBM-DP) Physical Layer according to ISO 11898-2,

transmission rate programmable from 10 kbit/s to 1 Mbit/s

Physical Layer DeviceNet

(DN-CBM-DP) Physical Layer according to DeviceNet specification Rev. 2.0,

bit rate: 125 kbit/s, 250 kbit/s, 500 kbit/s

Bus termination A terminating resistor has to be set externally, if required

Table 3: Data of CAN/DeviceNet interface

i

Overview

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

CAN-CBM-DP / DN-CBM-DPPage 14 of 45

1.4.4 Profibus-DP Interface

Number of Profibus-DP

interfaces 1x Profibus-DP

Connection 9-pin DSUB female

DP controller Siemens Profibus Controller SPC3, DP-Slave

Electrical insulation of

Profibus-DP from other circuits via optocouplers and DC/DC converters

Physical Layer RS-485

Table 4: Data of Profibus-DP interface

1.4.5 Serial Interface

Controller 68331

Interface Standard: RS-232

Options: RS-422, RS-485, TTY active/passive

Connection 9-pin DSUB male

Table 5: Data of serial interface

i

Overview

CAN-CBM-DP / DN-CBM-DP

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

Page 15 of 45

2. Hardware Installation

To put the CAN/DN-CBM-DP into operation, please follow the installation notes.

Step Procedure see

page

Read the safety instructions at the beginning of this document carefully, before

you start with the hardware installation! 5

DANGER

Hazardous Voltage - Risk of electric shock due to unintentional contact with

uninsulated live parts with high voltages inside of the system into which the

CBM-DP module is to be integrated.

All current circuits which are connected to the device have to be

sufficiently protected against hazardous voltage (SELV according to EN

60950-1) before you start with the installation.

Ensure the absence of voltage before starting any electrical work.

NOTICE

The CBM-DP module shall not be connected to a DC power supply network

without protection against surge voltage.

Use an external overvoltage protection.

1 Mount and connect the CBM-DP module and connect the interfaces (Power

supply, CAN or DeviceNet, PROFIBUS-DP). 11

2 Please note that the CAN bus has to be terminated at both ends!

esd offers special T-connectors and termination connectors for external

termination.

Additionally the CAN_GND signal has to be connected to earth at exactly one

point in the CAN network.

For details please read chapter “Correct Wiring of Electrically Isolated CAN

Networks”.

Any CAN node that does not support a galvanic isolation represents the

equivalent of a Ground (GND) connection.

35

3 Turn on the 24 V-power supply voltage of the CBM-DP module. -

Circuit Description

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

CAN-CBM-DP / DN-CBM-DPPage 16 of 45

3. Circuit Description

3.1 CAN/DeviceNet Circuit

3.1.1 Interface Circuit

The CAN-CBM-DP module is equipped with an ISO 11898-compliant CAN interface, the DN-CBM-

DP with a DeviceNet interface. The same connector in Combicon design is used for the two types, the

assignment of the connector, however, differs. The following figures show both interfaces.

Figure 5: Circuit of CAN interface CAN-CBM-DP

Circuit Description

CAN-CBM-DP / DN-CBM-DP

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

Page 17 of 45

Figure 6: Circuit of DeviceNet interface DN-CBM-DP

Circuit Description

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

CAN-CBM-DP / DN-CBM-DPPage 18 of 45

3.2 Profibus-DP Circuit

*)... The 100 resistor R126 is equipped from serial number IS....

Figure 7: Circuit of Profibus-DP interface

NOTICE

The terminating resistors of the Profibus-DB networks have to be connected externally

(see EN 50 170)!

Circuit Description

CAN-CBM-DP / DN-CBM-DP

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

Page 19 of 45

3.3 Serial Interface

3.3.1 Configuration

The physical interface of the serial configuration interface can be configured as an RS-232, RS-422, RS-

485, TTY-active or TTY-passive interface. For RS-232 operation an RS-232A driver component is used

and for the other interfaces piggy-backs are used.

The serial interface is controlled by the 68331. The bit rate of the interface can be set by parameters.

For each interface type (RS-232, RS-422, RS-485, TTY) a bit rate of up to 38.4 kbit/s is supported.

The following bit rates can be set by means of the software. The values in the second column show the

actual bit rates, which result from the controller-internal conversion.

Bit rate (set value)

[bit/s] Bit rate (actual value)

[bit/s]

38,400

19,200

9,600

4,800

2,400

1,200

600

300

38,462

19,231

9,615

4,808

2,404

1,199

600.2

299.9

Table 6: Adjustable bit rates

Circuit Description

Hardware-Manual • Doc.-No.: C.2844/6.21

/

Rev. 1.9

CAN-CBM-DP / DN-CBM-DPPage 20 of 45

3.3.2 Connection of Various Serial Interfaces

Below the wiring of the serial interfaces is shown. The figures are used to explain the terms for the

signals used in the appendix. In the appendix you can also find the circuit diagrams of the various

available piggy-backs.

The signal terms are exemplary for the connection of the CBM-DP as transmitter (terminal DTE).

3.3.2.1 The RS-232 Interface

The input signals CTS, DSR and DCD are not evaluated by the CAN-CBM-DP and DN-CBM-DP!

Figure 8: Connection diagram for RS-232 operation

La pagina si sta caricando...

ESD CAN-CBM-DP/DN-CBM-DP PROFIBUS-DP/CAN Gateway PROFIBUS-DP/DeviceNet Gateway Manuale del proprietario

Questo manuale è adatto anche per

ESD CAN-CBM-DP/DN-CBM-DP PROFIBUS-DP/CAN Gateway PROFIBUS-DP/DeviceNet Gateway Manuale del proprietario

in altre lingue

Altri documenti