Instruction Bulletin

Multi-Point Communications Interface (MCI101)

RS-232 / RS-485 Converter Kit

INTRODUCTION

63230-017-200/A1

11/2001

Replaces 3090IB9802 dated 01/1999

Using this RS-232 / RS-485 converter kit, you can connect the RS-232 serial port of a PC to POWERLOGIC, Modbus, or Jbus devices on an RS-485 daisy chain. To communicate to the devices, you must have installed on the PC,

System Manager™ Software (SMS) from POWERLOGIC or other serial communication software.

This bulletin explains how to install and configure the MCI101 converter between the PC and the RS-485 daisy chain of a POWERLOGIC system. For systems other than POWERLOGIC, refer to the Black Box instruction manual included in the converter shipping carton.

PACKAGE CONTENTS

Table 1: Contents of the MCI101 converter kit

Item

RS-232/RS-485 Converter Kit

Serial Communication Cable

RS-485 Communication Cable

Model / Type

Black Box converter IC109A with attached power supply

Serial cable with a DB9-Female on one end and a DB25-Male at the other

POWERLOGIC cable CAB-108-NL

SAFETY PRECAUTIONS

WARNING

HAZARD OF ELECTRIC SHOCK, BURN, OR EXPLOSION

To avoid personal shock or damage to the electronic components of the converter, do not connect the power supply to the converter until you have made all connections as described in the bulletin.

Failure to observe these instructions can result in death or serious injury.

COMMUNICATIONS CONNECTIONS

Making the communications connections requires four main steps as described in the sections that follow:

1. Configure the converter.

2. Connect the CAB-108-NL cable to the converter.

3. Connect your serial field devices to the converter, using cable CAB-107

(not provided).

4. Connect the serial cable from the PC to the converter.

1

Multi-Point Communications Interface (MCI101)

Communications Connections

Configuring the Converter

63230-017-200/A1

11/2001

Follow these steps to configure the converter:

1. Completely remove the thumbscrew on the bottom of the converter and remove the cover.

2. Set the configuration options for the converter as described in Table 2.

Refer to Figure 1 for locations on the circuit board.

Position

W8

W15

W17

DCE (XW1A)

DTE (XW1B)

S2

S3

W5

W9

W16

Table 2: RS-232/RS-485 converter setup options

4-Wire Daisy Chain

POWERLOGIC, Modbus, or Jbus

2-Wire with No Echo Daisy Chain

Modbus or Jbus

2-Wire with Echo Daisy Chain

Modbus or Jbus

A–B (4-wire, full duplex)

A–B (RTS/CD Enabled)

B (7 msec)

B–C (2-wire, half duplex)

B–C (Data Enabled)

D (0.7 msec)

B–C (4-wire, full duplex)

B–C (Data Enabled)

D (0.7 msec)

16-pin DIP shunt is shipped in position XW1A for DCE. NOTE : If not in this position, be careful not to bend the pins when moving the 16-pin DIP shunt from XW1B to XW1A. We recommend that you use an integrated circuit extraction tool.

ON

ON

A-B (RTS/CTS)

C (0 msec)

B (0.1 msec)

J1

R49/W7

3

4

1

2

TB1

P2

XW1B

DTE

O

N

S3

O

N

S2

W18

XW1A

DCE

W8 A-B = 4 WIRE

B-C = 2 WIRE

E

W16 TURNAROUND

A

B = 0.1ms

C = 1ms

D = 5ms

E = 35ms

DS3

PWR

K

W9

30 mesc

W5

A

B

C

A-B = RTS/CTS

B-C = RTS/CTS/CD

W19

W15

W15 A-B = RTS/CD ENABLED

B-C = DAT

A C E

W17

B = 7ms

C = 2ms

D = 0.7ms

E = 0.15ms

Figure 1: Circuit board layout

S1

DS2

CD/RTS

DS1

DSR4

TX

DS5

RX

K

K

K

K

2 © 2001 Schneider Electric All Rights Reserved

63230-017-200/A1

11/ 2001

Connecting the Cables

4-Wire Devices

Multi-Point Communications Interface (MCI101)

Communications Connections

Depending on your system type, refer to Figure 2 or Figure 3 on page 4 and follow these steps to make the connections:

NOTE: For communication cable pinouts, refer to “Appendix A—

Communication Cable Pinouts” on page 6. See “Appendix B—Comms Link

Distance and Baud Rate Limitations” on page 7 for details on maximum baud

rates and distances.

1. Connect the RS-485 cable (CAB-108-NL) to the converter. Do this by inserting the colored wires of the CAB-108-NL into the terminals of the

TB1 connector on the converter circuit board.

2. Plug the male DB-9 end of the CAB-107 (not provided) into the female

DB-9 end of the CAB-108-NL.

3. Wire the other end of the CAB-107 to the first device of the RS-485 daisy chain.

NOTE: Refer to the instruction manual for the devices for information about RS-485 communication connections.

4. Plug the DB-9 female end of the serial cable into the serial port of the PC.

Plug the DB-25 end into the RS-232 port of the converter.

To POWERLOGIC,

Modbus, or Jbus

Field Devices

NOTE: A terminator is required on the last device of the daisy chain.

See the instruction manual for the field device for proper termination using Square D terminator

MCT485 or MCTAS-485.

WHITE

GREEN

BLACK

RED

Belden 8723

Shield

WHITE RX–

GREEN RX+

BLACK TX–

RED TX+

CAB-107

CAB-108-NL

PC

System

Manager™

Software

RXB RXA TXB TXA

TB1 RS485 Port

RS232 Port

DB25 Male

Serial Cable

DB9 Female

RS232 Port

Converter

(IC109A)

© 2001 Schneider Electric All Rights Reserved

Figure 2: 4-wire, RS-485 network using IC109A converter

3

Multi-Point Communications Interface (MCI101)

Communications Connections

2-Wire Devices

63230-017-200/A1

11/2001

NOTE: A terminator is required on the last device of the daisy chain.

See the instruction manual for the field device for proper termination using Square D terminator

MCT485 or MCTAS-485.

To POWERLOGIC,

Modbus, or Jbus

Field Devices

PC

System

Manager™

Software

DB9 Female

RS232 Port

Belden 1120A

(for Enercept Meters)

BLACK

RED

OR

Belden 8723

WHITE

GREEN

BLACK

RED

OR

Belden 9841

WHITE

BLUE

Shield

WHITE RX–

GREEN RX+

BLACK TX–

RED TX+

CAB-107

CAB-108-NL

Jumper RXB to TXB and RXA to TXA

RXB RXA TXB TXA

TB1 RS485 Port

RS232 Port

DB25 Male

Serial Cable

Converter

(IC109A)

4

Figure 3: 2-wire, RS-485 network using IC109A converter

© 2001 Schneider Electric All Rights Reserved

63230-017-200/A1

11/ 2001

OPERATION

TECHNICAL SUPPORT

Multi-Point Communications Interface (MCI101)

Operation

After making all the connections, follow these steps:

1. Replace the converter cover and re-install the thumbscrew.

2. Plug the power supply of the converter into the outlet (120 Vac grounded receptacle).

The power LED should light up and the converter is ready for communications.

To communicate with SMS, follow these steps:

1. Launch SMS.

2. Open an existing system or create a new system.

3. Add a communication connection (Setup > Communication Connection).

a. For the communications connection name, type in a unique name for your MCI101 connection.

b. For the communications driver, select “Serial driver.” c. Select the communications parameters.

4. After defining the communications connection, add the serial daisychained devices using the previously defined MCI101 communication connection.

For more details, please refer to the SMS Help option in SMS by going to

Help > SMS Help> Quick Start > Quick Start Serial Device Setup.

5. Once online with your SMS system, the converter LEDs (TX and RX) blink to indicate communications. If the LEDs are not blinking, check the configuration of each device in SMS and ensure communication wiring is properly connected according to the instructions in this bulletin.

To get technical support, contact the POWERLOGIC Technical Support

Center:

Hours: 7:30 AM to 4:30 PM, Central Time, Monday through Friday

Phone:

Fax:

Email:

615-287-3400 (leave a message after business hours)

615-287-3404 (24 hours a day, 7 days a week)

[email protected]

© 2001 Schneider Electric All Rights Reserved 5

Multi-Point Communications Interface (MCI101)

Appendix A—Communication Cable Pinouts

APPENDIX A—COMMUNICATION CABLE

PINOUTS

CAB-108-NL Cable 2 ft (.6 m)

Flying

Leads

TXA

TXB

RXA

RXB

WHITE

GREEN

BLACK

RED

Shield

Female

DB-9

1

4

5

2

3

8

9

6

7

CAB-107 Cable 10 ft (3 m)

Spade

Lugs

RX– WHITE

RX+ GREEN

TX– BLACK

TX+ RED

SHEILD

Male

DB-9

1

4

5

2

3

8

9

6

7

9 PIN TO 25 PIN Serial Cable

Female

DB-9

1

2

3

4

7

8

5

6

9

Male

DB-25

20

7

6

4

8

3

2

5

22

6

63230-017-200/A1

11/2001

4

5

6

1

2

3

7

8

9

Male

DB-9

CC-100 Cable 10 ft (3 m)

Male

DB-9

4

5

6

1

2

3

7

8

9

Figure 4: Pinouts

© 2001 Schneider Electric All Rights Reserved

63230-017-200/A1

11/ 2001

Multi-Point Communications Interface (MCI101)

Appendix B—Comms Link Distance and Baud Rate Limitations

APPENDIX B—COMMS LINK DISTANCE

AND BAUD RATE LIMITATIONS

Tables 3 and 4 show the maximum distances of the communications link at different baud rates. The maximum daisy chain distance is determined by the baud rate and the types of RS-485 devices (2-wire / 4-wire) on the daisy chain. The distances are measured from the PC to the farthest device on the communications link.

Table 3: 4-Wire Daisy Chain Maximum Distances

➀

Baud Rate

1200

2400

4800

9600

1–16 Devices

Maximum distances

17–32 Devices

10,000 ft (3,048m)

10,000 ft (3,048m)

10,000 ft (3,048m)

10,000 ft (3,048m)

10,000 ft (3,048m)

5,000 ft (1,524m)

5,000 ft (1,524m)

4,000 ft (1,219m)

19200 5,000 ft (1,524m) 2,500 ft (762m)

38400 5,000 ft (1,524m) 1,500 ft (457m)

➀

Due to the volume of RS-485 devices in the field, this table is only to be used as a guide and was tabulated based on POWERLOGIC 4-wire devices and POWERLOGIC 4-wire devices that support 2-wire devices.

Table 4: 2-Wire Daisy Chain Maximum Distances

➀

Baud Rate

1200

2400

4800

9600

19200

1–8 Devices

Maximum distances

10,000 ft (3,048m)

10,000 ft (3,048m)

10,000 ft (3,048m)

10,000 ft (3,048m)

5,000 ft (1,524m)

9–16 Devices

10,000 ft (3,048m)

5,000 ft (1,524m)

5,000 ft (1,524m)

4,000 ft (1,219m)

2,500 ft (762m)

38400 2,500 ft (762m) 1,500 ft (457m)

➀

Due to the volume of RS-485 devices in the field, this table is only to be used as a guide and was tabulated based on POWERLOGIC 4-wire devices and POWERLOGIC 4-wire devices that support 2-wire devices.

© 2001 Schneider Electric All Rights Reserved 7

63230-017-200/A1

11/ 2001

APPENDIX C—CONNECTING THE

POWERLOGIC NETWORK INTERFACE

MODULE (PNIM)

Multi-Point Communications Interface (MCI101)

Appendix C—Connecting the POWERLOGIC Network Interface Module (PNIM)

To connect to the POWERLOGIC Network Interface Module (PNIM) refer to

Figure 5.

NOTE: For communication cable pinouts, refer to “Appendix A—

Communication Cable Pinouts” on page 6. See “Appendix B—Comms Link

Distance and Baud Rate Limitations” on page 7 for details on maximum baud

rates and distances.

CAB-107 (If < 10 ft) else Belden 8723 with

Male DB-9 connector

MCA-485

Connector

To POWERLOGIC

Field Devices

WHITE

GREEN

BLACK

RED

WHITE RX–

GREEN RX+

BLACK TX–

RED TX+

Shield

NOTE: A terminator is required on the last device of the daisy chain. See the instruction manual for the field device for proper termination using Square D terminator

MCT485 or MCTAS-485.

PNIM

Comm Ports

CC-100 (If < 10 ft) else Belden 8723 with

2 Male DB-9 connectors

CC-100

CAB-108-NL

PC

System

Manager™

Software

DB9 Female

RS232 Port

Serial Cable (6 ft)

RXB RXA TXB TXA

TB1 RS485 Port

RS232 Port

DB25 Male

Converter

(IC109A-R2)

Square D Company

295 Tech Park Drive, Suite 100

LaVergne, TN 37086

(615) 287-3500

8 Class 3090

Figure 5: Converter connection to network interface module

Electrical equipment should be serviced only by qualified maintenance personnel. No responsibility is assumed by Square D for any consequences arising out of the use of this material.

© 2001 Schneider Electric All Rights Reserved