Unitronics M90 OPLC Manual de usuario

Unitronics

M90/91™ OPLC™

Installation Guide

Models M90/91™

This guide provides basic information for Unitronics’ M90/91™ OPLC™.

General Description

M90/91™ OPLC™ are palm-sized programmable logic controllers that comprise a built-in operating

panel containing a multilingual text-only LCD screen and a keypad. M90 series offer a single text line

display. M91 offers 2 text lines.

Communications

All M90/M91 controllers comprise a serial port. M90 series support

RS232 only. An M91 serial port may be set to RS485.

CANbus and SMS/GSM support are model-dependent features.

I/O Options

M90/91 supports digital, high-speed,

and analog I/Os via:

Onboard I/O Configuration

Differs from model to model.

I/O Expansion Modules

Via I/O expansion port, most

M90 models can be

expanded by up to 64 I/Os,

M91 by up to 96. Check the

specifications of your model

for details.

Programming

Write both the HMI and Ladder control application using U90 Ladder freeware.

The M90 User Guide and the product’s technical specification sheet contain additional information.

These documents are located on the Unitronics’ Setup CD. They may also be downloaded from the

Technical Library at www.unitronicsplc.com.

Standard Kit Contents

M90 or M91 controller

Rubber seal (mounted in back of panel)

Mounting brackets (x2)

I/O connectors (x2)

5-pin CANbus connector and CANbus network termination resistor (CANbus models)

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Danger Symbols

When any of the following symbols appear, read the associated information carefully.

Symbol

Meaning

Description

Danger

The identified danger causes physical and property damage.

Warning

The identified danger could cause physical and property damage.

Caution

Use caution.

Before using this product, the user must read and understand this document.

All examples and diagrams are intended to aid understanding, and do not guarantee operation.

Unitronics accepts no responsibility for actual use of this product based on these examples.

Please dispose of this product according to local and national standards and regulations.

Only qualified service personnel should open this device or carry out repairs.

Failure to comply with appropriate safety guidelines can cause severe injury or property damage.

Do not attempt to use this device with parameters that exceed permissible levels.

To avoid damaging the system, do not connect/disconnect the device when power is on.

Environmental Considerations

Do not install in areas with: excessive or conductive dust, corrosive or flammable gas,

moisture or rain, excessive heat, regular impact shocks or excessive vibration, in accordance

with the standards given in the product’s technical specification sheet.

Ventilation: 10mm space required between controller’s top/bottom edges & enclosure walls.

Do not place in water or let water leak onto the unit.

Do not allow debris to fall inside the unit during installation.

Install at maximum distance from high-voltage cables and power equipment.

Mounting

Dimensions

Installation Guide

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Panel mounting

Before you begin, note that the

mounting panel cannot be more

than 5 mm thick.

1. Make a panel cut-out

measuring 92 x 92 mm

(3.622” x 3.622”).

2. Slide the controller into the

cut-out, ensuring that the

rubber seal is in place.

3. Push the 2 mounting brackets

into their slots on the sides of

the controller as shown in the

figure to the right.

4. Tighten the bracket screws

against the panel. Hold the

bracket securely against the

unit while tightening the

screw.

5. When properly mounted, the

controller is squarely situated

in the panel cut-out as shown

in the figure to the right.

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DIN-rail mounting

1. Snap the controller onto the DIN rail

as shown in the figure to the right.

2. When properly mounted, the controller

is squarely situated on the DIN-rail as

shown in the figure to the right.

I/O Modules

The controllers offer an on-board I/O configuration that differs according to the controller model; I/O

wiring diagrams are in the controller’s technical specification sheet.

Additional I/Os may be integrated into the system via I/O Expansion Modules that you plug into the

controller’s I/O expansion port. Note that the relevant wiring diagrams are in the module’s technical

specification sheet, and that an I/O adapter is required for most modules.

Wiring: General

Do not touch live wires.

Unused pins should not be connected. Ignoring this directive may damage the device.

Caution

To avoid damaging the wire, do not exceed a maximum torque of 0.5 N·m (5 kgf·cm).

Do not use tin, solder, or any substance on stripped wire that might cause the wire

strand to break.

Use crimp terminals for wiring; use 26-14 AWG wire (0.13 mm 2–2.08 mm2).

1. Strip the wire to a length of 7±0.5mm (0.250–0.300”).

2. Unscrew the terminal to its widest position before inserting a wire.

3. Insert the wire completely into the terminal to ensure a proper connection.

4. Tighten enough to keep the wire from pulling free.

Installation Guide

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Power Supply

The controller requires an external 12 or 24VDC power supply, according to the controller model.

Exact information may be found in the controller’s technical specification sheet.

A non-isolated power supply can be used if a 0V signal is connected to the chassis.

You must use an external circuit protection device.

Install an external circuit breaker. Guard against short-

circuiting in external wiring.

Double-check all wiring before turning on the power

supply.

Do not connect either the ‘Neutral or ‘Line’ signal of the

110/220VAC to device’s 0V pin.

In the event of voltage fluctuations or non-conformity to

voltage power supply specifications, connect the device

to a regulated power supply.

M91 only: Earthing the Power Supply

To maximize system performance, avoid electromagnetic interference by:

Mounting the controller on a metal panel.

Earthing the controller’s power supply: connect one end of a 14 AWG wire to the chassis

signal; connect the other end to the panel.

Note: The wire used to earth the power supply must not exceed 10 cm in length. If your

conditions do not permit this, do not earth the power supply

Communication Ports

Note that different controller models offer different serial and CANbus communication options. To

see which options are relevant, check your controller’s technical specifications.

Turn off power before making communications connections.

Caution

Note that the serial ports are not isolated.

Signals are related to the controller’s 0V; the same 0V is used by the power supply.

Always use the appropriate port adapters.

Serial Communications

Both M90 and M91 comprise an RJ-11 type serial port that supports RS232.

An M91 serial port can be set to either RS232 or RS485 according to jumper settings.

Use RS232 to download programs from a PC, and to communicate with serial devices and

applications, such as SCADA.

Use RS485 to create a multi-drop network containing up to 32 devices.

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Pinouts

The pinouts below show the signals between the adapter and port.

RS232

RS485

Controller Port

Pin #

Description

Pin #

Description

Pin #1

DTR signal

A signal (+)

0V reference

(RS232 signal)

TXD signal

(RS232 signal)

RXD signal

(RS232 signal)

0V reference

(RS232 signal)

DSR signal*

B signal (-)

*Standard programming cables do not provide connection points for pins 1 and 6.

M91 only: RS232 to RS485: Changing Jumper Settings

To access the jumpers, open the controller and then remove the module’s PCB board.

Before you begin, turn off the power supply, disconnect and dismount the controller.

When a port is adapted to RS485, Pin 1 (DTR) is used for signal A, and Pin 6 (DSR)

signal is used for signal B.

If a port is set to RS485, and flow signals DTR and DSR are not used, the port can also

be used to communicate via RS232; with the appropriate cables and wiring.

Before performing these actions, touch a grounded object to discharge any electrostatic

charge.

Avoid touching the PCB board directly. Hold the PCB board by its connectors.

1. Turn power off before opening the

controller.

2. Locate the 4 slots on the sides of the

controller.

3. Using the blade of a flat-bladed

screwdriver, gently pry off the back of

the controller.

4. Gently remove the top PCB board:

a. Use one hand to hold the top-most

PCB board by its top and bottom

connectors.

b. With the other hand, grasp the

controller, while keeping hold of the

serial ports; this will keep the

bottom board from being removed

together with the top board.

c. Steadily pull the top board off.

5. Locate the jumpers, and then change

the jumper settings as required.

Jumper settings are shown on

page 7.

Installation Guide

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Unitronics

6. Gently replace the PCB board. Make

certain that the pins fit correctly into

their matching receptacle.

a. Do not force the board into place;

doing so may damage the

controller.

7. Close the controller by snapping the

plastic cover back in its place. If the

card is placed correctly, the cover will

snap on easily.

RS232/RS485 Jumper Settings

RS232/RS485 Jumper Setting

RS485 Termination

To use as

Jumper 1

Jumper 2

Termination

Jumper 3

Jumper 4

RS232*

ON*

RS485

OFF

*Default factory setting.

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CANbus Communications

121

terminating

resistor

121

terminating

resistor

Circuit

protection

device

24V Power

Supply

-V

Certain controllers comprise a CANbus port. Use

this to create a decentralized control network of

up to 63 controllers using Unitronics’ proprietary

CANbus protocol.

The CANbus port is galvanically isolated.

CANbus Wiring

Use twisted-pair cable. DeviceNet® thick

shielded twisted pair cable is recommended.

Network terminators: These are supplied with the

controller. Place terminators at each end of the

CANbus network.

Resistance must be set to 1%, 121Ω, 1/4W.

Connect ground signal to the earth at only one

point, near the power supply.

The network power supply need not be at the

end of the network

CANbus Connector

The information in this document reflects products at the date of printing. Unitronics reserves the right, subject to all applicable laws, at any time, at its sole

discretion, and without notice, to discontinue or change the features, designs, materials and other specifications of its products, and to either permanently or

temporarily withdraw any of the forgoing from the market.

All information in this document is provided "as is" without warranty of any kind, either expressed or implied, including but not limited to any implied warranties of

merchantability, fitness for a particular purpose, or non-infringement. Unitronics assumes no responsibility for errors or omissions in the information presented in

this document. In no event shall Unitronics be liable for any special, incidental, indirect or consequential damages of any kind, or any damages whatsoever arising

out of or in connection with the use or performance of this information.

The tradenames, trademarks, logos and service marks presented in this document, including their design, are the property of Unitronics (1989) (R"G) Ltd. or other

third parties and you are not permitted to use them without the prior written consent of Unitronics or such third party as may own them

DOC02001-A5 07/18

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