EcoStruxure I/O Smart Link - I/O Smart Link User Guide

Introduction

The I/O Smart Link device has 11 channels (24 Vdc) and can be connected to devices in the Acti 9 range equipped with a Ti24 interface. Thanks to the Ti24 link, data can be transmitted from the I/O Smart Link device to a PLC or a supervision system via a Modbus communication network.

The I/O Smart Link channels can also be used to transmit standardized I/O. The I/O Smart Link device can also therefore communicate with devices (not in the Acti 9 range) with or without a Ti24 link.

Devices which can be connected to the I/O Smart Link device include:

Acti 9 products: control switch for iACT24 contactors and iATL24 impulse relays, iC60 iOF+SD24 indication auxiliary, C60 OF+SD24 indication auxiliary, RCA iC60 remote control with Ti24 interface, Reflex iC60 integrated control circuit breaker with Ti24 interface
Meters: iEM2000T or other meters (Schneider Electric or other manufacturers) in compliance with IEC 62053-21 (minimum pulse 30 ms).
Any product (not in the Acti 9 range) that has command and control information: two discrete 24 V outputs and one discrete 24 V inputs.

The I/O Smart Link device is an intermediary between the supervisor and various electrical appliances. It can therefore be used to retrieve and process data received from devices and also control them. The functions available depend on the type of connected devices.

Refer I/O Smart Link functions for more information.

Description

The following figure shows the front and top faces of I/O Smart Link device:

For detailed information regarding installation instructions, refer to PKR5509302 I/O Smart Link - Instruction Sheet.

11 digital input/output channels
One 24 Vdc power supply connector
LEDs that show the device operating status
Two Modbus address coding switches
Reset button
One 4-pin Modbus connector
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Status LED

The STATUS LED indicates the operation mode of I/O Smart Link:

LED indication	Description
	Light off. I/O Smart Link switched off.
	Green light when the I/O Smart Link device operates normally.
	Slow green light blinking (1 blink / s) while pressing reset button between 1 and 10 seconds. Communication settings are reset if pushbutton released before 10 seconds. Fast green light blinking (2 blinks / s) while pressing reset button for more than 10 seconds. Customer settings are reset to factory settings.
	Orange light in case of a degraded mode: I/O Smart Link power-up Problem with peripheral device: short-circuit or overload on the 24 Vdc I/O Power supply level less than 13.7 Vdc
	Orange light blinking during reset to factory settings for between 20 and 30 seconds.
	Alternately green and red lights every second during firmware update.
	Red light when a major malfunction is detected in the I/O Smart Link device.

Communication LED

The COM LED indicates the Modbus serial communication status of I/O Smart Link:

LED indication	Description
	Light off. No Modbus communication.
	Yellow light when Modbus serial communication is booting during I/O Smart Link power-up.
	Yellow light flashing when Modbus serial communication is active.

Coding Switch

The I/O Smart Link device addressing is performed using two coding switches:

The left-hand coding switch sets the tens.
The right-hand coding switch sets the units.

Reset Button

There are two levels of reset launched by pressing the Reset button (R):

Level 1: Press and hold the Reset button for between 1 and 10 seconds to reset the communication settings and trigger Auto Baud rate of the I/O Smart Link. See Auto Baud Rate for more information.
Level 2: Press and hold the Reset button for more than 10 seconds to reset the I/O Smart Link device to its factory settings. See Resetting of factory parameters for more information.

Connecting the Modbus Connector

NOTICE
HAZARD OF NON-OPERATION OF MODBUS NETWORK Comply with the wiring and connection rules described in PKR5509302 I/O Smart Link - Instruction Sheet to create a working Modbus network. Failure to follow these instructions can result in equipment damage.

The Schneider Electric communication cables to be used are:

Product reference	Description	Length
50965	RS 485 double shielded twisted pair cable for Modbus serial link (supplied without connector)	60 m (196 ft)

NOTE:

Make sure that line terminator is not already present at client level.
It is possible to use a common 24 Vdcpower supply for several I/O Smart Link devices if installed in the same switchboard.

Checking the Modbus Serial Link

The table gives the characteristics of the RS 485link that need to be checked during installation:

Designation	Description
Shielding connection	Each Modbus serial link must have shielding connected at one point to an earthed link.
Bus polarization	Pull-up resistor connected to the 5 V: 450–650 Ohm Pull-down resistor connected to ground (Modbus 0 V): 450–650 Ohm NOTE: This polarization is recommended for the client.
Line terminator	Two Modbus line terminators (120 Ohm + 1 nF), reference VW3A8306DRC. The Modbus cable communication pair has characteristic impedance of 120 Ohm. The Modbus cable must therefore have a Modbus line terminator with 120 Ohm impedance at each end. The Modbus client is at one end of the Modbus cable and usually has a switchable terminal impedance. At the other end of the Modbus cable, a Modbus line terminator with 120 Ohm impedance must be connected. To obtain a high-frequency impedance of 120 Ohm without loading the cable with direct current, the Modbus line terminator is optimized in the form of an RC cell: 120 Ohm in series with a 1 nF capacitor and two 10 cm wires for direct connection to the 5-pin connector of the last Modbus interface module, between D0 and D1.
Ground polarity	The ground circuit (0 V of an optional power supply) must be connected directly to a protected earth, preferably at a single point on the bus. This point is usually placed on the client or its servers.
Trunk cable	A pair of shielded twisted cables and a third conductor at minimum.
Maximum length of bus	1000 m (3280.84 ft) with the Schneider Electric 50965 cable.