Linear Technology LTC2874 Quick setup guide

dc2228af

DEMO MANUAL DC2228A

Description

LTC2874

8-Port IO-Link Master

Reference Design

Demonstration circuit 2228A is a complete 8-port IO-Link

Master that uses two LT C

2874 IC’s to implement its

IO-Link v1.1 physical interface (PHY). DC2228A operates

either with an external supply VDD or a Power over Ethernet

(PoE) system. The IO-Link stack protocol runs on an

NXP microcontroller. A software Control Tool operates

the DC2228A.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot

Swap and LTPoE++ are trademarks of Linear Technology Corporation. IO-Link is a registered

trademark of PROFIBUS Nutzerorganisation (PNO) e.V. All other trademarks are the property of

their respective owners. Compatible with IO-Link Consortium as set forth by PROFIBUS PNO.

performance summary

BoarD photo

Design files for this circuit board are available at

http://www.linear.com/demo/DC2228A

Specifications are at TA= 25°C

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

VDD Input Supply Range J5; S1 in EXT Position 20 30 V

---- PoE Supply Range J1; S1 in PoE Position; LTPoE++ 90W 41 57 V

VSMSupply Voltage for Devices 20 30 V

ISMSupply Current for Devices 200 mA

ISIRMCurrent Pulse Capability for Devices V(L+) > 18V 500 mA

dc2228af

DEMO MANUAL DC2228A

Quick start proceDure

The following hardware and software are required:

• PCrunningWinXPorlaterwithEthernetorUSB-to-

Ethernet adapter

• TEConceptControlToolsoftware.SeeStep1.

• 24V power supply or PoE power sourcing equipment

(PoE injector or PoE switch).

• One or more IO-Link devices, such as Linear

Technology’s DC2227A.

Thisprocedureassumesa 24V power supply and adynamic

IP address assigned via DHCP. Operation using PoE or a

fixed IP address is described elsewhere in this manual.

1. Download and install the DC2228A Control Tool software

from: www.linear.com/demo/DC2228A.

2. Hook-up (Figure 1):

a. Setthepowersourceselector (S1) to the EXT position.

b. Keeping its output disabled, connect a 24V input

power supply to J5.

NOTE: Ensure that the input voltage does not exceed 30V.

c. Connect anEthernetcablebetweenJ1and thenetwork

to which the PC is connected.

d. Connect one or more IO-Link devices using the M12

connectors(J21–J28)andcablesupto20min length.

Refer to Table 1.

3. Turn on the 24V Power.

4. Operate the DC2228A using the Control Tool software.

Refer to the DC2228A Control Tool section for details.

Brieﬂy, the steps are:

a. Start the Control Tool.

b. Find the IP address assigned to the DC2228A by

DHCP.

c. Conﬁgure port devices using I/O Description (IODD)

ﬁles.

d. Enter the DC2228A IP address (from Step a), then

click the “Connect” button to connect the Control

Tool software to the DC2228A (Figure 8).

e. Click “Power ON” button to turn on device power.

f. Click “IO-Link” button to begin communication.

5. Alternate conﬁgurations:

a. For operation using a direct Ethernet connection not

involving a LAN, refer to the Alternate Conﬁguration

for Fixed IP Address section and Figure 2.

b. For Power over Ethernet (PoE) operation, refer to the

Power over Ethernet section and Figures 3 and 4.

6. Reference material:

a. Refer to the DC2227A Demo Manual for information

and operating details if using this IO-Link device.

7. When ﬁnished, disable all ports (using the “Inactive”

and “Power OFF” buttons) and disconnect the Control

Tool (using the “Disconnect” button). Then, turn off the

power supply or PoE source.

dc2228af

DEMO MANUAL DC2228A

Quick start proceDure

Figure 1. Set-Up Using Power Supply and DHCP

Figure 2. Alternate Set-Up Using Power Supply and Direct Ethernet Connection

CABLES

TO DEVICES

(0 TO 20m)

24V

–

PORT 4

PORT 2

LOCAL AREA NETWORK

ETHERNET CABLES

PC RUNNING

DC2228A

CONTROL TOOL

(USE 'EXT'

SWITCH

SETTING)

24V

ETHERNET CABLE

PC RUNNING

DC2228A

CONTROL TOOL

–

PORT 4

PORT 2

CABLES

TO DEVICES

(0 TO 20m)

(USE 'EXT'

SWITCH

SETTING)

dc2228af

DEMO MANUAL DC2228A

operating information

Overview

The DC2228A implements a complete IO-Link Master for

eight ports. Two LTC2874 quad-master IC’s provide power

and signaling for the physical interface (PHY). The IO-Link

stack protocol runs on one core of a dual-core NXP LPC43

microcontroller. The other core runs an Ethernet port for

connecting to a PC running a control program.

A 90W LTPoE++™Power over Ethernet system supports

alternative power from sourcing equipment such as a

PoE injector or PoE switch. The LTPoE++ circuits use an

LT4321 ideal diode bridge and an LT4275 PD controller,

and feed into an isolated flyback converter controlled by

an LT3748.

Four IO-Link ports connect directly to the LPC43’s built-

in UARTs, while the remaining four use a port expander

application run by an Atmel SAM4N MCU.

Supporting functional blocks include a step-down switch-

ing regulator that uses an LT3682 to produce a regulated

3.3V supply for both microcontrollers, and a temperature

sensor made with an LTC2997.

Compatibility

The DC2228A and Control Tool software will operate any

device compliant with IEC 61131-9 Single-Drop Commu-

nication Interface (SDCI), commonly known as IO-Link.

Switch and Button Controls

S1: Power Source Selector. Selects between external 24V

(switch up) and PoE (switch down) sources.

SW1 (RESET): Resets the NXP microcontroller and Eth-

ernet connection.

SW2 (IP): Sets the current IP address as the default.

Connectors

J1: Ethernet jack

J5: External 24V power

J16: JTAG programming interface for NXP LPC43 micro-

controller. Factory use only.

J18: JTAG programming interface for Atmel SAM4 micro-

controller. Factory use only.

J21 to J28: M12 connectors for IO-Link cables. Although

these are 5-pin connectors, the DC2228A PHY uses only

3 pins per port.

Table 1. Connector vs. Port

PORT CONNECTOR

1 J25

2 J21

3 J26

4 J22

5 J27

6 J23

7 J28

8 J24

Table 2. M12 Connector Pins

PIN NUMBER PIN NAME

1 2

4 3

1 L+

2 N/C

3 L– (GND)

4 C/Q

5 N/C

Jumpers

J41: PoE Classification resistor selector. Selects 49.9Ω

RCLASS resistor. See Table 5. Default shunt.

J42:LTPoE++Classification resistor selector. Selects 118Ω

RCLASS++ resistor. See Table 5. Default shunt.

J103: JTAG source selector for SAM4N. Factory use only.

Default position 2–3 (GND).

dc2228af

DEMO MANUAL DC2228A

operating information

Status Indicators

Top LED

Table 3. LED0 (Ethernet Link/Active)

STATE DESCRIPTION

Off No link

Green Link

Blinking Green Activity

Bottom LED

Table 4. LED1 (Ethernet Link Speed)

STATE DESCRIPTION

Off 10 Mbps

Green 100 Mbps

Power over Ethernet (PoE)

The DC2228A optionally operates using power supplied

over an Ethernet connection, eliminating the need for a

local power supply. To use this mode:

a. Set the power source selector (S1) to the PoE position.

b. Connect a PoE injector (Figure 3), PoE switch, or

other Power Sourcing Equipment capable of 90W (for

example, an LTPoE++ demo board, DC1814A-D) to its

power adapter or supply.

c. Connect an Ethernet cable between J1 and the PoE

injector/switch output.

d. Connect an Ethernet cable between the PoE injector/

switchinput and thePCrunningthe ControlToolsoftware.

Because the DC2228A is nominally classified as a 90W

LTPoE++ PD (Powered Device), it requires a PSE rated at

this power level for unrestricted operation.

Limited operation with a PSE rated for less power is pos-

sible, but the classification must be changed using Table5.

For example, to operate using a 13W PoE injector, remove

the J42 shunt (keeping the J41 shunt in place) and restrict

the total power consumption accordingly.

A PSE rating below 90W might easily be adequate, depend-

ing on the actual power consumed by devices connected

to eight ports. This consideration must take into account

whether the C/Q lines will drive DC loads (e.g., in SIO

mode) or only connect with IO-Link devices.

For additional guidance regarding PoE classification set-

tings, refer to the LT4275 data sheet.

Figure 3. 90W LTPoE++ Injector (Allnet ALL048900)

Table 5. Classification Resistor Programming

RCLASS RCLASS++

CLASS PD Type NOMINAL

ICLASS

PD POWER

AVAILABLE NOTE

J40

34.8Ω

J41

49.9Ω

J42

118Ω

J43

34.8Ω

---- Open Open ---- 0 Type 1 0.4mA 13W

---- Shunt Open ---- 3 Type 1 28mA 13W

---- Open Shunt ---- ---- Invalid ---- ----

Shunt* Open Open ---- 4 Type 2 40mA 25.5W

---- Open Open Shunt* 4** LTPoE++ 40mA 38.7W

---- Shunt Shunt ---- 4** LTPoE++ 40mA 90W Default

*Jumper not provided. Requires addition of 2-pin header to PC board.

**LTPoE++ PD will be classified as Class 4 Type 2 by an IEEE 802.3 compliant PSE.

dc2228af

DEMO MANUAL DC2228A

operating information

TVS Protection

The C/Q and L+ pins are protected by 36V TVS diodes. Do

not connect to any voltage higher than 30V.

Thermal Protection

If the DC2228A board temperature reaches 80°C, the Con-

trol Tool software reports a “TEMP-FAULT” and disables

operation. The thermal sensor Q19 is located underneath

flyback transformer T1.

L+ Diode Isolation

If L+ isolation is desired, remove 0Ω resistors R158 to

R165 which normally shunt Schottky diodes D28 to D35.

Demonstration Board Options

The DC2228A reference design demonstrates LTC2874

operating in an 8-port IO-Link master system. Its two

LTC2874 IC’s operate under the control of the IO-Link v1.1

protocol stack coded in microcontroller firmware. Control

Tool software provides access to a limited set of LTC2874

features but is oriented toward operating IO-Link devices

that connect to the DC2228A ports.

The default internal register settings for the on-board

LTC2874 IC’s are listed in Table 6.

Another demonstration board, DC1880A, provides access

to all LTC2874 features and more direct access to its SPI

Table 6. DC2228A Default Settings for LTC2874 R/W Registers

Address

Name

Default

Value

Address

Name

Default

Value

0x1 IRQMASK 0x96 0x9 MODE2 0x04

0x2 EVENT1 0x00 0xA NSF 0xFF

0x3 EVENT2 0x00 0xB ILLM 0xFF

0x4 EVENT3 0x00 0xC TMRCTRL 0xD2

0x5 EVENT4 0x00 0xD CTRL1 0x00

0x8 MODE1 0x80 0xE CTRL2 0x00

Companion IO-Link Device DC2227A

While the DC2228A and Control Tool software will operate

any IO-Link sensor, the example screen shots given in this

manual use the DC2227A IO-Link Device with Multiple

Sensors. The DC2227A is a complete IO-Link Device

incorporating the LT3669-2 along with a temperature sen-

sor, light sensor, pushbutton, and an incandescent lamp.

IO-Link Firmware

The firmware contained in the NXP microcontroller is intel-

lectual property owned by TEConcept Gmbh in Germany.

Any attempt to copy, transfer, or reverse engineer the

firmware is forbidden. The source code or an object library

for the IO-Link stack can be licensed from TEConcept.

dc2228af

DEMO MANUAL DC2228A

operating information

Figure 4. Set-Up Using PoE and DHCP

Figure 5. Alternate Set-Up Using PoE and Direct Ethernet Connection

CABLES

TO DEVICES

(0 TO 20m)

ETHERNET

(USE 'PoE'

SWITCH

SETTING)

PORT 4

PORT 2

LOCAL AREA NETWORK

CABLES

56V

–

PSE

–

OUT

90W PoE

PC RUNNING

DC2228A

CONTROL TOOL

56V

CABLES

TO DEVICES

(0 TO 20m)

ETHERNET CABLES

–

(USE 'PoE'

SWITCH

SETTING)

PORT 4

PORT 2

PC RUNNING

DC2228A

CONTROL TOOL

–

OUT

90W PoE

PSE

dc2228af

DEMO MANUAL DC2228A

Dc2228a control tool

Overview

The DC2228A Control Tool configures and operates the

8-port IO-Link Master via an Ethernet connection. It

controls and monitors the status of each port, while also

providing access to the parametric register data within

each connected IO-Link device.

The Control Tool supports DHCP for dynamic IP address

assignments, or can operate using a fixed IP address.

Along with some navigation aids, the main window is

shown in Figure 6.

Installation

Download the software from www.linear.com/demo/

DC2228A and follow the on-screen instructions.

IO-Link Device Configuration

For any port that will operate an IO-Link device, load the

device’s IO Device Description, or IODD, file (Figure 7):

1. Click “Select device” button.

2. If IODD ﬁle isn’t already listed, click “Import” button,

select the {IODD}.xml ﬁle, and then click “Open.”

3. Highlight the IODD ﬁle to be assigned and click the

“Select device” button.

Normal Configuration for Network Connection using

DHCP

Normally, the Control Tool connects with the DC2228A

via Ethernet connections to a local area network (LAN),

in which case network-assigned IP addresses are usually

expected. To configure for dynamic IP address assign-

ment by DHCP, both the PC and the DC2228A must each

be configured for this mode. However, for the PC, this is

usually already the case, and it’s also the default mode

for the DC2228A.

1. Connect Ethernet cables per Figure 1 (if using a power

supply) or Figure 4 (if using PoE).

2. As needed, set the PC settings per the section Conﬁgur-

ing a PC to Operate with DHCP-Assigned IP Address.

3. Apply power from either a 24V power supply or PoE

power sourcing equipment.

4. Start the Control Tool software.

5. Find the IP address assigned to the DC2228A as follows:

a. Open a Command Window.

b. Get the PC IPv4 address returned by:

ipconfig

c. In the Control Tool, run Master settings →Find. Set

the IP address range to span the subnet that includes

the PC’s IP address from Step 5b; then click the

“Search” button.

d. When the utility ﬁnishes running, note the IP address

listed following “IO-Link Master connected on ad-

dress:”

6. Enter the DC2228A communication settings

(Figures 8a and 8b):

IP address = {from step 5}

Port = 7

7. Connect the Control Tool to the DC2228A using the

green “Connect” button (Figure 8c and 8d).

NOTE: to re-enable DHCP behavior after using the

DC2228A with a ﬁxed IP address, use the procedure

givenin the section One-Time DC2228A conﬁguration to

Restore DHCP Behavior after using a Fixed IP Address.

Alternate Configuration for Fixed IP Address

To use a fixed IP address, first configure both the PC and

the DC2228A for this mode:

1. Connect Ethernet cables according to Figure 2 (if using

a power supply) or Figure 5 (if using PoE).

2. Conﬁgure the PC to operate with a ﬁxed IP address

using the procedure given in the section Conﬁguring a

PC to Operate with Fixed IP Addresses.

3. Conﬁgure the DC2228A to operate with a ﬁxed IP

address using the procedure given in the section One-

Time DC2228A Conﬁguration to Use a Fixed IP Address

Instead of DHCP.

dc2228af

DEMO MANUAL DC2228A

Dc2228a control tool

4. Apply power from either a 24V power supply or PoE

power sourcing equipment.

5. Start the Control Tool software.

6. Enter the DC2228A communication settings (Figure 8a

and 8b). Using the default address:

IP address = 192.168.10.150

Port = 7

NOTE: The default IP address can be changed using

the procedure given in the section One Time DC2228A

conﬁguration to change the ﬁxed IP address.

7. Connect the Control Tool to the DC2228A using the

green “Connect” button (Figure 8c and 8d).

IO-Link Operation

To operate a connected device that’s been configured for

IO-Link operation (Figure 9):

1. Click the “Power ON” button to supply power to the

device.

2. Click the “IO-Link” button to begin communication.

3. Operate IO-Link device. For a typical sensor thisinvolves

monitoring process data and events.

4. Click the “Inactive” and “Power OFF” buttons when

done.

Digital Input Operation

To operate in DI mode (Figure 10), for receiving data from

a device connected to the C/Q line:

1. If an IODD ﬁle has been associated with the port,

remove it using Select device →Exit and not select.

When powered, the connected device will now run in

Standard IO (SIO) mode.

2. Click the “Power ON” button to supply power to the device.

3. Click the “DI” button. The Raw Process Data In ﬁeld

will monitor the digital state at the C/Q pin.

4. In the case of a DC2227A device, the C/Q state can be

changed by interacting with its light sensor.

5. Click the “Inactive” and “Power OFF” buttons when done.

Digital Output Operation

To operate in DO mode (Figure 11), for switching the C/Q

line as a Standard IO (SIO) output:

1. If an IODD ﬁle has been associated with the port,

remove it using Select device →Exit and not select.

When powered, the connected device will now run in

Standard IO (SIO) mode.

2. Consider whether the connected device will tolerate a

C/Q driver conﬂict. If conﬂicts occur, master C/Q over-

current events could be triggered (see Fault Conditions

section). If connected to a DC2227A, be aware that the

device output state in SIO mode is determined by its

light sensor. The DC2228A and DC2227A won’t damage

each other. Other devices could be stronger or weaker

than the DC2228A, and might not tolerate a conﬂict.

3. Click the “Power ON” button to supply power to the device.

4. Click the “DO” button and “OK” the conﬁrmation mes-

sage.

5. Click the “High” or “Low” radio buttons to switch the

C/Q state.

6. Click the “Inactive” and “Power OFF” buttons when

done.

Fault Conditions

If the Control Tool detects a fault on any port, it reports, in

red, a Master PHY event at the bottom of the main window.

The operator may query faults using the Master settings

→Check PHY events pull-down menu. After fixing the

underlying condition, the operator may clear faults using

the same pull-down menu.

Software License and Renewal

The Control Tool license is valid for 10000 minutes of

cumulative operation. Unlimited free renewals, as well as

an unlimited license, are available. To renew the license:

1. Get the hardware ID usingTools →License key manager

and clicking the “Export hardware ID” button.

dc2228af

DEMO MANUAL DC2228A

Dc2228a control tool

DC2228A F06

A C E J

G H I

B K

(A) Control Tool connection controls (G) Connected device state and speed

(B) Control Tool connection status (H) Light bulb controls and status

(D) Port status (J) Device parameters

(E) Device selector and device parameters (K) Firmware version

(F) Device configuration controls

Figure 6. Control Tool Main Window

2. Send the hardware ID and request for free license

renewal to TEConcept GmbH using this address and

subject line:

To: [email protected]

Subject: DC2228A license renewal request

3. Receive the new license key by email.

4. Again using Tools →License key manager, enter the

new key. For Period, enter “10000”. Then click the

“Send” button and close the window.

5. Re-open the license manager and check that the “Re-

maining time” has been reset.

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