W&T 57630, 57631 User Manual

Manual

Web-IO 12+12 Digital

Release2.07, November 2004

Type 57630, 57631

ModelFirmware 1.42/2.07 and higher

W&T

Subject to error and alteration:

Since it is possible that we make mistakes, you mustn't use any of our statements without verification. Please, inform us of any error or misunderstanding you come about, so we can identify and eliminate it as soon as possible.

Carry out your work on or with W&T products only to the extent that they are described here and after you have completely read and understood the manual or guide. We are not liable for unauthorized repairs or tampering. When in doubt, check first with us or with your dealer.

W&T

Introduction

The W&T Web-IO provides the ability to monitor and set 12 digital inputs and 12 digital outputs using Ethernet TCP/IP.

The digital inputs are galvanically isolated in groups of 4 each and can be driven with +/- 30V.

The outputs are current sourcing and can be fed with 6 - 30V thorugh a common voltage input. UP to 500mA per output can be switched. The individual outputs have thermal overload protection and are short circuit protected. The outputs can be wired in pairs or in parallel in groups of 4 outputs each to achieve higher switching currents.

The Ethernet interface is configured as 10/100Mbit autosensing.

The following TCP/IP protocols are available for reading and setting the in- and outputs:

HTTP Simple user interface in the browser window TCP Direct socket access from your own applications UDP Direct socket access from your own applications SMTP Alarm triggering via e-mail with configurable input

conditions

SNMP Incorporation into management systems and

alarm triggering via SNMP trap

Box-to-Box

Paired linking of Web-IOs

Configuration of the Web-IO can be performed via Web-Based Management manually in the browser window or loaded using an XML file.

The 12X Digital Web-IO can be powered with 12-24V AC or DC connected to screw terminals. Alternately the included plug-in power supply can be used for 230V operation.

W&T Content

Content

Introduction 3

1 Before starting up 9

1.1 Supply voltage and network connection 10

2 Assigning the IP address 11

2.1 Assigning the IP address using the WuTility-Tool 12

2.2 Assigning the IP address using the ARP command 14

2.3 Assigning the IP address through the serial port 16

2.3.1 Serial assignment of subnet mask and gateway 16

2.3.2 Serial deactivation of the DHCP-/BOOTP client 17

2.4 IP assignment via RARP server 18

2.5 IP assignment via DHCP-/BOOTP protocol 19

2.5.1 Deactivating the DHCP/BOOTP protocol 20

3 Connections, operating elements and LEDs 23

3.1 Overview of connections and elements 24

3.2 Ethernet connection 25

3.3 Serial connection 26

3.4 Supply voltage input 27

3.5 LEDs for device status 28

3.6 Input- and Output connections 30

3.6.1 Input circuit 30

3.6.2 Output circuit 31

4 Configuring the network parameters 33

4.1 Web-Based Management 34

4.1.1 Basics 34

4.1.2 Structure of the Web site 34

4.1.3 Navigation 34

4.1.4 Easier navigation with profiles 36

4.1.5 Access rights 36

4.1.6 Changing and creating the access passwords 38

4.1.7 Saving and activating settings 38

4.2 Basic setting of the network parameters 40

5 Access types 45

5.1 Possible operating modes - An overview 46

5.1.1 Basic operating modes 46

W&T Content

Subject to errors and modifications:

5.1.2 Alarm service 49

5.1.3 Input /Output service 49

5.1.4 System Service 50

5.2 Specifying the output mode 51

5.3 HTTP - In- and Output control from the browser 52

5.3.1 Labeling and texts 53

5.3.2 Creating your own Web site for the Web-IO 57

5.3.3 Java Applets - Auto-updating in the browser 64

Working with the Java applet 64 Using the applet with JavaScript 67 Limits when using the Java applet 71

5.4 Controlling the Web-IO with TCP/UDP Sockets 72

5.4.1 Selecting the appropriate access mode 72

5.5 Socket programming with command strings 75

5.5.1 TCP communication 75

5.5.2 UDP communication 81

5.5.3 Program-controlled error management 85

5.6 BINARY - socket programs with binary structures 91

5.6.1 Specifying the operation mode 92

5.6.2 The Web-IO as socket server 93

5.6.3 The Web-IO as socket client 94

5.6.4 The Web-IO as UDP Peer 97

5.6.5 Passwort protection 100

5.6.6 BINARY - The IO structures 102

5.6.7 Definition of the IO structures 103

5.6.8 Working with the IO structures 104

5.6.9 IO structures in various languages 109

5.7 Box-to-Box 116

5.7.1 Configuring theSlave Web-IO 116

5.7.2 Configuring the master 119

5.7.3 GetBox-to-Box connection status 124

5.7.4 Stopping Box-to-Box mode 124

5.7.6 Box-to-Box notes and limitations 126

5.8 OPC - standardized access 128

5.8.1 Installing the OPC-Server 128

5.8.2 Uninstalling 129

5.8.3 Configuration 129

5.8.4 Configuring the Web-IO as an OPC device 132

5.8.5 Program options 134

5.8.6 Direct control from control panels 136 Abbreviations used 136

W&T Content

5.8.7 Access using Visual Basic or VBA 137

5.8.8 One Web-IO, multiple client computers 140

5.9 SNMP - In-/Outputs in management systems 142

5.9.1 Enabling SNMP access 142

5.9.2 Activating the outputs for SNMP 143

5.9.3 Main steps for SNMP access 144

5.10 Syslog - Get system messages 146

5.10.1 Enable Syslog 146

5.11 Alarms 148

5.11.1 Specifying alarm conditions 148

5.11.2 E-Mail-Alarm - SMTP 151

5.11.3 SNMP Alarm 154

5.11.4 Alarm via UDP 156

5.11.5 Alarm message to your own TCP applications 157

5.11.6 Alarm message to a TCP server 158

5.11.7 Sending alarm messages to a Syslog-Server 160

5.11.8 General information about alarms 162

6 General Functions 163

6.1 Time / Date - Setting 164

6.1.1 Time zones 164

6.1.2 Summer time / Winter time 165

6.1.3 Start and end of summer time 165

6.1.4 End of summer time 166

6.1.5 Time-Server 167

6.1.6 Manually setting time and Date 169

6.1.7 Activating all time/date settings 170

6.2 Safety Timeout / State - Access monitoring 171

6.2.1 Specifying safety timeout 171

6.2.2 Safety State festlegen 172

6.3 Ports - Input- and output configuration 174

6.3.1 Input configuration 174

6.3.2 Output configuration 175

6.4.3 Logic functions 178

6.3.4 Pulse mode 180

6.5 Changing device-specific displays 182

6.6 Upload/Download 184

6.6.1 Download 184

6.6.2 Upload 185

6.7 Diagnostics and testing 187

6.7.1 Error report 187

W&T Content

Subject to errors and modifications:

6.7.2 Configuration 188

6.7.3 LED test 192

7 Appendix 195

7.1 Firmware Update 196

7.1.1 Where can I get the current firmware? 196

7.1.2 Firmware update over the network using WIndows 196

7.2 Emergency access 198

7.3 Ports and network security 199

7.3.1 Ports 199

7.3.2 The W&T Web-IO and network security 199

7.3.4 Ports mit special function: 201

7.4 Network inventory via UDP 203

7.4.1 The info packet 203

7.5 Wiring examples for the inputs 206

7.6 Wiring examples for the outputs 207

7.7 Error messages and causes 208

7.7 Technical Data 210

7.9 Declaration of Conformity 211

W&T Content

W&T Befor starting up

1 Before starting up

We recommend to read the complete Manual for the 12+12 Digital Web-IO before startup.

. Connecting the supply voltage

. Connecting to the network

W&T Befor starting up

1.1 Supply voltage and network connection

Use a patch cable to connect the Web-IO to an unused HUB or SWITCH port. The Web-IO has an autosensing 10/100BaseT network connection and automatically detects the network speed.

Internet/ Intranet

5678

10 11 12 13

14 15

17 18 19

20 21 22 23 24 25 26 28 29 30

Reset

Power

Status

Error

Serial Port

error

system error

http:// . . . /diag

0 11109GND 87546321GND

GND

INPUT GROUP 0 INPUT GROUP 1 INPUT GROUP 2

11109

GND

87546321Vcc

6-30V DC

+Vdd

OUTPUT GROUP 0 OUTPUT GROUP 1

OUTPUT GROUP 212-24V

Vcc

W&T

www.wut.de

Web-IO #57630

12xDigital-IO <-> 10/100BT

Connect a supply voltage of between 12 V and 24 V AC or DC to terminals 1 and 2.

Compatible power supplies can be obtained as an accessory from W&T. See http://www.wut.de Products & Downloads >>

Web-IO Digital.

After approx. 2 sec. a beep will sound and the Status and Error LEDs should have turned off. If the red Error LED flashes, check the network connection.

If the WEB-IO has no IP address or address 0.0.0.0, the

on error and system error LEDs remain on after a reset or new start! The LEDs will turn off only if an IP address has been assigned.

W&T Assigning the IP address

Subject to errors and modifications:

2 Assigning the IP address

The Web-IO is factory set to IP address 0.0.0.0. Before assigning a new one,

you must obtain an appropriate IP address from your system administrator.

In smaller, unrouted networks use the IP address of your PC and simply

change the last digit.

1 Always bear in mind that IP addresses must be unique within a network.

. Assigning using the WuTility tool

. Assigning using the ARP command

. Assigning through the serial port

. Assigning via RARP protocol

. Assigning via DHCP/BOOTP protocol

W&T Assigning the IP address

2.1 Assigning the IP address using the WuTility-Tool

This method cannot be used if you do not have a PC running under Windows and an installed TCP/IP stack. In this case, skip to section 2.2.

The other requirements are that the Web-IO does not yet have an IP address, i.e., the address is 0.0.0.0, and the PC is located in the same network segment as the Web-IO.

If the Web-IO already has an IP address, change it by using one of the other methods described in this section of by using the menu item Config/Device/Network in the Web-based Management of the Web-IO.

First start WuTility.exe from any desired directory on your hard drive.

On our web site www.WuT.de, having selected the

Englisch language version, on the left side you find „Insider search via article number“. Enter here the article no. 57630, select „Tools“ in the checkbox below and click „Go“. On the page that will open, you select the link „WuTility“.

Click on the

icon to start the network scan.

The list of found W&T network components should now contain an entry for the Web-IO. The IP address should be indicated as

0.0.0.0 if you are starting up for the first time. Check the

W&T Assigning the IP address

Subject to errors and modifications:

displayed Ethernet address to make sure the entry agrees with your Web-IO.

Read off the Ethernet address of the Web-IO from the sticker on the side of the housing:

5763x [Model]

EN=00c03d003fa0

OK xxxxxx

Ethernet address

Select the entry for your Web-IO.

Click on the

icon and enter the IP address you want to assign

to the Web-IO.

Click on the

icon to update the list.

Now your Web-IO has an IP address and can be accessed in the local network.

All other settings can now be easily made via Web-Based Management (see section Basic setting of network parameters)

W&T Assigning the IP address

2.2 Assigning the IP address using the ARP command

This method can only be used if the Web-IO does not yet

have an IP address, i.e., if the entry is 0.0.0.0. To change an IP address, use one of the other methods described in this section or use the menu item Config/Device/Network in the WebBased Management of the Web-IO.

An additional prerequisite is a computer which is located in the same network segment as the Web-IO and on which TCP/IP protocol is installed. Read off the Ethernet address of the Web-IO from the sticker on the side of the housing:

5763x [Model]

EN=00c03d003fa0

OK xxxxxx

Ethernet address

Now use the following command to add a static entry to the ARP table of your PC :

arp -s [IP address] [MAC address]

Example under Windows:

arp -s 172.16.231.17 00-C0-3D-00-3F-A0

Example under SCO UNIX:

arp -s 172.16.231.17 00:C0:3D:00:3F:A0

Older Windows systems accept a static entry only if a dynamic entry already exists. Here you should first ping

another network station.

Finally start the Web browser and enter the following URL:

http://[IP address]

[

Return

]

Example:

W&T Assigning the IP address

Subject to errors and modifications:

In Windows environments IP addresses must be entered

without leading zeroes. Otherwise the system interprets the entry incorrectly and an incorrect IP address is assigned to the Web-IO.

The Web-IO takes the IP address of the first network packet sent to its Ethernet address as its own and saves it in non-volatile memory. The HTTP connection is then opened and the Homepage of the Web-IO appears in the browser. All other settings can now be easily made via Web-Based Management (see section Basic setting of the network parameters).

W&T Assigning the IP address

2.3 Assigning the IP address through the serial port

After a reset of the Web-IO a time window of approx. 1-2 seconds is made available, during which entering at least 3 „x“ makes it possible to assign a new IP address.

In contrast to the previously described method via

ARP, the serial way works regardless of whether the WebIO already has an IP address or not. The procedure may be repeated as often as desired. Therefore you should use this method if you don‘t know the IP address or have forgotten it. The appendix to this manual contains a detailed description for using Windows with Hyperterminal.

First connect the Web-IO to the serial port of a computer. For a standard PC a crossed RS232 cable (= null modem cable) is required (see section Serial connection).

The serial transmission parameters of the terminal program used are configured for 9600 baud, no parity, 8 bits, 1 stop bit, no handshake. Press the reset button on the Web-IO briefly and enter the letter „x“ at least three times on the terminal until the prompt IPno.+<Enter>: appears in the terminal program.

Use the conventional format (xxx.xxx.xxx.xxx) to enter the IP address, and finish your entry with <Enter>. If the entry was accepted, the system acknowledges with the assigned IP address. Otherwise a FAIL message is issued followed by the last current IP address.

All additional settings can now be made easily via Web-Based Management in the browser (see section Basic setting of the network parameters).

2.3.1 Serial assignment of subnet mask and gateway

Together with the IP address, the subnet mask and gateway address can also be assigned serially. The entry is comma delineated following the IP address. The following example

W&T Assigning the IP address

Subject to errors and modifications:

assigns IP address 172.17.232.17, subnet mask 255.255.255.0 and gateway 172.17.232.252 to the Web-IO.

IP no.+<ENTER>: <- Web-IO

172.17.232.17,255.255.255.0,172.17.232.252 -> Web-IO

172.17.232.17,255.255.255.0,172.17.232.252-1 <- Web-IO

2.3.2 Serial deactivation of the DHCP-/BOOTP client

The DHCP-/BOOTP function of the Web-IO can be turned off while serially assigning the IP address. We recommend doing this in any case where the IP assignment will not be expressly performed using DHCP/BOOTP.

To deactivate the DHCP/BOOTP client, enter the option „-0“ (zero) immediately following the IP address (no spaces!) and finish the entry with <Enter>.

Example:

xxx -> Web-IO IP no.+<ENTER>: <- Web-IO

172.17.232.17,255.255.255.0,172.17.232.252-0 -> Web-IO

172.17.232.17,255.255.255.0,172.17.232.252-0 <- Web-IO

This of course functions the same way when entering the subnet mask and gateway..

You can reactivate the function at any time later by using WebBased Management im the browser.

Menu item: Config >> Device >> Network

W&T Assigning the IP address

2.4 IP assignment via RARP server

UNIX environments especially often use RARP protocol for centrally assigning IP addresses. Here TCP/IP devices that want an IP address send RARP requests with your Ethernet address as a network broadcast.

Activate the RARP server on the UNIX system and enter the Ethernet address of the Web-IO in the file /etc/ethers. You must also enter the IP address of the Web-IO in the file /etc/hosts.

5763x [Model]

EN=00c03d003fa0

OK xxxxxx

Ethernet address

The Web-IO must be located in the same subnet as the RARP server.

Example

Your Web-IO has the MAC address EN= 00C03D003FA0 (device sticker). You want to give it the IP address 172.16.232.17 and the alias name WEBIO_1:

• Entry in the file /etc/hosts:

172.16.232.17 WEBIO_1

• Entry in the file /etc/ethers:

00:C0:3D:00:3F:A0 WEBIO_1

If the Web-IO‘s IP address is 0.0.0.0 (=Factory Default), RARP broadcasts are cyclically generated in order to obtain a valid address from any existing RARP daemon.

If the Web-IO already has a valid IP address, an RARP broadcast is generated following each reset. If a reply follows within 500ms, the IP address contained therein is accepted. As with assigning via the serial port, this method also makes it possible to overwrite a current IP address.

W&T Assigning the IP address

Subject to errors and modifications:

2.5 IP assignment via DHCP-/BOOTP protocol

Many networks use DHCP (Dynamic Host Configuration Protocol) or BOOTP for central and dynamic assignment of IP

addresses. Which of these two protocols should be used in connection with the Web-IO makes no difference, since DHCP is simply a backwards compatible extension of BOOTP. DHCP servers thus also handle requests from BOOTP clients. The following parameters can be assigned to the Web-IO using these protocols:

. IP address . Subnet mask . Gateway address

It is not possible to send additional parameters or lease-time.

Function

To obtain an IP address, the Web-IO sends a corresponding BOOTP request as a broadast to the network following each new start. The resulting reply generated by the DHCP/BOOTP server contains in addition to the IP address the subnet mask and gateway address as well. The Web-IO immediately places this information in its non-volatile memory.

To start up the Web-IO in DHCP/BOOTP networks, contact your system administrator. If DHCP is used to assign the address, please indicate that a reserved IP address is needed. To maintain the respective address database, the administrator will need the Ethernet address of the Web-IO, which can be found on the sticker on the housing:

5763x [Model]

EN=00c03d003fa0

OK xxxxxx

Ethernet address

After the administrator has made the necessary settings, the WebIO automatically gets the desired IP address after each reset. To ensure that the Web-IO can be reached even if the DHCP/BOOTP

W&T Assigning the IP address

server is down, the previous IP address is maintained if there is no reply.

In DHCP environments the IP address to be

assigned must be reserved by a fixed entry in the DHCP table with the Ethernet address of the Web-IO. Under WIndows NT this is done in the DHCP manager under the menu item „Reservations“. Linux provides the file „dhcpd.conf“ for this purpose, in which a corresponding entry must be made.

2.5.1 Deactivating the DHCP/BOOTP protocol

A DHCP server assigns IP address dynamically from an address pool assigned by the administrator. This means that DHCP-capable devices usually get another IP address after each start. Since a constantly changing IP address is not desired with the Web-IO, the latter uses the BOOTP protocol based on fixed relationships between Ethernet and IP address. DHCP servers should reply to BOOTP requests only if they use explicit IP reservation for the Ethernet address of the sender.

Some DHCP servers (e.g., Windows 2000 servers) however serve both DHCP as well as BOOTP requests from their dynamic address pool. To prevent the Web-IO from getting IP addresses unknown to the user assigned in such environments, the following options are available:

. Before connecting the Web-IO to the network, you must

make a reservation in the respective DHCP server.

. The IP address of the Web-IO is assigned through the serial

port. Sending „xxx“ to the Web-IO during a new start takes you to the input mode for a new IP address. Enter it followed by the string „-0“ (zero) to deactivate the BOOTP client of the Web-IO (see section IP assignment through the serial port).

W&T Assigning the IP address

Subject to errors and modifications:

In existing systems the BOOTP client of the Web-IO can also be activated and deactivated at any time using Web-Based Management in the browser.

Menu item Config >> Device >> Network

W&T Assigning the IP address

W&T Connections, operating elements and LEDs

Subject to errors and modifications:

3 Connections, operating elements and LEDs

. Ethernet connection

. RS232

. Supply voltage connection

. Reset button

. Device status LEDs

. Input and Output connections and LEDs

W&T Connections, operating elements and LEDs

3.1 Overview of connections and elements

error

system error

http:// . . . /diag

0 11109GND 87546321GND

GND

INPUT GROUP 0 INPUT GROUP 1 INPUT GROUP 2

11109

GND

87546321Vcc

6-30V DC

+Vdd

OUTPUT GROUP 0 OUTPUT GROUP 1

OUTPUT GROUP 212-24V

Vcc

W&T

www.wut.de

Web-IO #57630

12xDigital-IO <-> 10/100BT

5678

10 11 12 13

14 15

17 18 19

20 21 22 23 24 25 26 28 29 30

Reset

Power

Status

Error

Serial Port

Reset

Device State

LEDs

RS232

Port

Supply Voltage Input

Outputs

Inputs

Ethernet

W&T Connections, operating elements and LEDs

Subject to errors and modifications:

3.2 Ethernet connection

The Web-IO models provide an IEEE 802.3-compatible network connection via a shielded RJ45 connector. The pinouts correspond to an MDI interface, so that the connection to the hub or switch can be made with a 1:1 shielded patch cable.

1 = Tx+

2 = Tx-

3 = Rx+

4 = nc 5 = nc

6 = Rx-

7 = nc

8 = nc

RJ45-Buchse (Belegung AT&T256)

10/100BaseT, Autosensing

Both 10BaseT and 100BaseTx standard with a bit rate of 100MBit/s and the possibility of full-duplex transmission are supported. Changing between the two network speeds is automatically done by the autosensing function of the Web-IO depending on the possibilities of the hub or switch used. The prerequisite for operation at 100MBit/s is suitable cabling (at least conforming to Cat. 5/ISO Class D).

Galvanic isolation

The network connection is galvanically isolated with respect to the supply voltage and to the digital IOs and the serial port(s) up to at least 500V

rms

Link status

The Error LED on the front of the unit indicates the current link status: If it flashes at 1-2 second intervals, there is no connection to the hub or the connection is faulty.

W&T Connections, operating elements and LEDs

3.3 Serial connection

On the Web-IO 12+12 Digital type 5730 the serial port is provided only for configuration purposes, such as assigning the IP address. With Type 57631 it also enables funktioality of a serial Com-Server.

The pinouts of this RS232 port are identical to those of your PC. This lets you use standard cables.

A detailed pin description as well as the W&T cables required for most common applications can be found in the illustrations below.

RS232 pin assignments and functions, DB9 plug

RS232

1 = NC

2 = RxD

3 = TxD

5 = GND

4 = DTR

8 = CTS

7 = RTS

6 = DSR

Com-Server <> PC, 9pin.

W&T Item# 1199x

1 2 3 4 5 6 7 8

4 3 2 1 5 6 8 7

DB9/FEMALE

Direction

---

OUT

---

OUT

---

Signal

RxD

TxD

DTR

GND

DSR

RTS

CTS

Description

Not Connected

Receive Data

Transmit Data

Data Terminal Ready

Signal Ground

Data Set Ready

Ready To Send

Clear To Send

Not Connected

Default Funktion (1)

---

Data in

Data out

12V for existing TCP connection to a client or server

---

ignored

Handshake output +12V = ready to receive data

- 12V = not ready to receive data

Send data only at +3...12V

---

(1) Applies only to the hardware handshake setting

To serially assign the IP address, cable 1199x and 1179x are recommended.

W&T Connections, operating elements and LEDs

Subject to errors and modifications:

3.4 Supply voltage input

The supply voltage is connected to screw terminals 1 and 2. The included 230V plug-in power supply is equipped with a special plug on the low-voltage side.

Alternately an existing voltage of between 12V and 24V can be connected. Since the Web-IO can operate on AC or DC voltage, the polarity of the supply voltage is not an issue.

To prevent cable breaks, we recommend fitting the ends of the conductors with crimp contacts.

Terminals 15 and 16 supply only the switched

outputs and require a DC voltage. Please read the section Input and Output connections and LEDs before applying power

W&T Connections, operating elements and LEDs

3.5 LEDs for device status

Power-LED:

Indicates the presence of supply voltage. If the LED does not come on, check the power supply connections.

Status-LED:

Blinks whenever there is network activity with the Web-IO. Periodic blinking indicates that the port has a connection to another station.

Error-LED:

The Error-LED uses various blinking codes to indicate error states on the device or network port.

1x blinking of the Error-LED

Check network connection. The Web-IO is not getting a link pulse from a hub/switch. Check the cable or the hub/switch port.

2x or 3x blinking of the Error-LED

Press the button on the housing to perform a reset. If this does not clear the error, reset the device to its factory defaults. Since this resets all network settings, you should write down your settings first.

Web-Based Management: Config >> Session Control >> LogOut >> Restore Defaults . Following a reset the device is restored to its factory defaults. Reconfigure your network settings.

More information about menus and coniguration can be found in the section Web-Based Management.

on error http://xxx.xxx.xxx.xxx/diag-LED:

Indicates internal configuration errors. For troubleshooting, go to page http://<IP address of the Web-IO>/diag in the unit.

W&T Connections, operating elements and LEDs

Subject to errors and modifications:

For example:

http://172.16.232.17/diag

system error:

Serious hardware error. Try to restart the unit by disconnecting the power supply. If the condition persists, please return the unit to your dealer so that it can be checked by W&T.

Power-LED +Status-LED +Error-LED on = Self-test error

The self-test performed by the Web-IO after each start or reset could not be correctly finished, due for example to an incomplete update of the firmware. In this condition the device is no longer functional. Please return the unit to your dealer so that it can be checked out by W&T.

If the Web-IO has no IP address or the address is 0.0.0.0,

the LEDs on error and system error will remain on after a reset or new start! The LEDs will turn off only if an IP address is assigned.

W&T Connections, operating elements and LEDs

3.6 Input- and Output connections

3.6.1 Input circuit

The Web-IO 12+12 Digital has 12 digital inputs divided into 3 groups of 4 inputs. The groups are galvanically isolated from each other for up to 2kV. A reference ground is brought out for each input group.

The permitted input voltage range is +/-30V with respect to the corresponding reference ground.

The switching threshold of the inputs is 8V +/- 1V. Voltages less than this are interpreted as an OFF or 0 signal. Voltages over 8V are interpreted by the Web-IO as ON or 1. Input voltages between 7V and 9V should be avoided, since they cannot be definitively interpreted.

error

system error

http:// . . . /diag

0 11109GND 87546321GND

GND

INPUT GROUP 0 INPUT GROUP 1 INPUT GROUP 2

11109

GND

87546321Vcc

6-30V DC

+Vdd

OUTPUT GROUP 0 OUTPUT GROUP 1

OUTPUT GROUP 212-24V

Vcc

W&T

www.wut.de

Web-IO #57630

12xDigital-IO <-> 10/100BT

5678

10 11 12 13

14 15

17 18 19

20 21 22 23 24 25 26 28 29 30

Reset

Power

Status

Error

Serial Port

+12 V

GND 12 V

GND 18 V

+ 18 V

Vcc

Example of an input circuit

This connection example shows two inputs being driven with signals from different circuits. It is important that all signals for an

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W&T 57630, 57631 User Manual

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