5

dc2227af

DEMO MANUAL DC2227A

aDDitional information

Connectors and Jumpers

The board has the following connectors:

Table 1. Connectors and Jumpers Overview

Name Type

Form

Comment

J1

Jumper

Pin-2

Atmel µC Flash Erase

J2

Connector M12

IO-Link Signals (L+, L–, CQ1, Q2)

J3

Jumper

Pin-2

LT3669-2 EN/UVLO Pin

J4

Header 8

× 2_2mm Eval Board DC1733

J5

Connector Pin-6

SPI Interface

J6

Jumper

Pin-4

Sensor Selection

J7

JTAG

Header10

× 2

JTAG Programming

J8

Jumper

Pin-3

VDD3 Select

J9

Jumper

Pin-3

Reset Select

Jumper J1

Jumper J1 sets the Erase/PB12 pin of the microcontroller

to VDD3 (3.3V). By default the J1 header is not populated.

FordetailsabouttheErase/PB12pinseetheATSAM31S2AA

microcontroller data sheet.

Connector J2

Connector J2 is a 5-pin M12 male connector. Plug a

standard industrial sensor cable to this connector to sup-

ply and communicate to the DC2227A using an IO-Link

master. Table 2 shows the internal pin assignments to the

LT3669-2 IO-Link PHY:

Table 2. Connector J2 Pinout

M12 Pin

LT3669-2’s Pin

Comment

1

L+

DC2227A Input Supply (24V)

2

Q2

LT3669-2 Second Driver

3

GND

DC2227A Ground Node

4

CQ1

LT3669-2 Transceiver (IO-Link)

5

Not Connected

Jumper J3

JumperJ3enables/disablestheonboardLT3669-2(which

also generates the internal 3.3V supply rail). Close this

jumper (default position) to use the onboard LT3669-2

as the IO-Link PHY (it will start up for L+ voltages above

14.8V). Leave this jumper open if the external DC1733A-B

board is used (via the J4 connector) as the IO-Link PHY

instead.

Connector J4

J4 is for connecting an external DC1733A-B demo circuit

bypassingtheon-boardLT3669-2.Thisconnectionallows

access to more signals from LT3669-2. Connect jumper

J3 from DC1733A-B pin-to-pin to jumper J4 on this board.

Table 3 identifies each pin.

Table 3. Connector J4 Pinout

Pin

Function

Comment

1

TXD2

DC1733A-B Driver Input (Q2)

2

TXEN2

DC1733A-B Driver Input (Q2)

3

TXD1

DC1733A-B Driver Input (CQ1)

4

TXEN1

DC1733A-B Driver Input (CQ1)

5

RXD1

DC1733A-B Receiver Output (CQ1)

6

GND

DC1733A-B Ground

7

WAKEn

DC1733A-B Wake-Up Output

8

GND

DC1733A-B Ground

9

SC2n

DC1733A-B Driver Short Circuit Output (Q2)

10

SC1n

DC1733A-B Driver Short Circuit Output (CQ1)

11

GND

DC1733A-B Ground

12

RST_n

DC1733A-B POR Reset Output

13

DC1733A-B LDO’s Output (3.3V)

14

GND

DC1733A-B Ground

15

TP33

DC1733A-B Buck Output (5V)

16

SYNC

DC1733A-B Buck Oscillator Synchronization Input