E

Isolated Repeater/Converter

This section describes how to use the Isolated Repeater/Converter (IC655CCM590) with Series 90

PLCs. The following topics are covered in this section:

•

Description of the Isolated Repeater/Converter

•

System Configurations

•

Cable Diagrams

This unit can be purchased from GE Fanuc Automation. Please contact any GE Fanuc Automation sales office or PLC distributor.

Note

The catalog number for the Isolated Repeater/Converter was previously

IC630CCM390.

Description of the Isolated Repeater/Converter

The Isolated Repeater/Converter (IC655CCM590) can be used for the following purposes:

•

To provide ground isolation where a common ground cannot be established between components.

•

To boost RS-422 signals for greater distance and more drops.

•

To convert signals from RS-232 to RS-422 or RS-422 to RS-232.

The locations of key features on the unit are shown in Figure E-10.

GFK-1065F Appendix E Converters E-13

E

E-14

P O W E R

C O R D H

115VAC

N

230VAC

N

G

J1

(T O P V IEW )

RS422

R S422

R S232C

POW ER

J2

S W IT C H a42 418

G E F anu c

FU S E

ISOLATED RS232

ADAPTOR UNIT

P O W E R

C O R D

F U S E

(B AC K VIE W )

FUSE-1AMP

Figure E-10. Isolated/Repeater Converter

(SID E V IEW )

The Isolated Repeater/Converter has the following features:

•

Two 25-pin female D-type connectors. (Two 25-pin male, D-type connectors (solder pot), are included for user cabling.)

•

115/230 VAC power connection (internal) 4-position terminal block.

•

Fused 1-Amp power protection.

•

Power ON (green) indicator LED.

•

Three-position toggle switch, recessed in the back of the unit, is set according to the system configurations described on page E-18.

Series 90™ Micro PLC User's Manual – June 1998 GFK-1065F

GFK-1065F

E

Logic Diagram of the Isolated Repeater/Converter

The figure below provides a functional overview of the unit. Note the three-position switch for controlling the J1 port transmitters. This switch is discussed in “System Configurations” on page E-

19

RS-422

J1

OPTICAL

ISOLAT ION

RS-422/RS-232C

J2

a 4 4 7 8 2

2

S D (R S -2 3 2 C )

2 2 2 2

R D ( B ' )

S D (B )

1 4 1 4

R D ( A ' )

1 5

2 3

1 5

2 3

4

S D (A )

R T S (R S -2 32 C ) 8

C TS ( B ' )

1 0

R E S IS T O R

1 50

1 1

C TS ( A ' )

9

S D ( B )

S D ( A )

R T S (B )

R T S (A )

11 5

V A C

2 5

1 7

1 6

2 4

1 2

1 3

IS O L A TE D

P O W E R

S U P P L IE S

( C TS )

(O N )

(S E )

1 0

1 1

R T S (B )

R T S (A )

1 9

1 7

R D ( B ' )

1 6

1 8

3

8

1 2

R D ( A ' )

R D (R S -2 32 C )

C T S ( B ' )

1 3

9

C T S ( A ')

5

C TS (R S -2 3 2 C )

2 5

S E (R S -23 2 C )

Figure E-11. RS-422 Isolated Repeater/RS-232 Converter Logic Diagram

Appendix E Converters E-15

E

Note

All inputs are biased to the inactive state. Inputs left unconnected will produce a binary 1 (OFF) state on the corresponding output.

Pin Assignments for the Isolated Repeater/Converter

Table E-8. Isolated Repeater/Converter Pin Assignments

J1 RS-422 Port (25-pin female connector)

Pin Signal Description

5

6

7

8

3

4

1

2

NC

NC

NC

NC

No connection

No connection

No connection

No connection

NC

NC

No connection

No connection

0V Ground Connection

CTS(B’) Clear to Send (Optional Termination)

9 CTS(A’) Clear to Send (Optional Termination)

10 CTS(B’) Clear to Send

11 CTS(A’) Clear to Send

12 RTS(B) Request to Send

13 RTS(A) Request to Send

14 RD(B’) Receive Data

15 RD(A’) Receive Data

16 SD(A) Send Data

17 SD(B) Send Data

18 NC

19 NC

20 NC

21 NC

No connection

No connection

No connection

No connection

22 RD(B’) Receive Data

23 RD(A’) Receive Data

24 SD(A) Send Data

J2 RS-422/RS-232 Port (25-pin female connector)

Pin Signal Description

5

6

7

8

3

4

1

2

NC

SD

RD

RTS

No connection

Send Data (RS-232)

Receive Data (RS-232)

Request to Send (RS-232)

CTS

NC

Clear to Send (RS-232)

No connection

0V Ground Connection

CTS(B’) Clear to Send Optional Termination)

9 CTS(A’) Clear to Send (Optional Termination)

10 RTS(B) Request to Send

11 RTS(A) Request to Send

12 CTS(B’) Clear to Send

13 CTS(A’) Clear to Send

14 SD(B) Send Data

15 SD(A) Send Data

16 RD(A’) Receive Data

17 RD(B’) Receive Data

18 RD(A’) Receive Data (Optional Termination)

19 RD(B’) Receive Data (Optional Termination)

20 NC

21 NC

No connection

No connection

22 SD(B) Send Data (Optional Termination)

23 SD(A) Send Data (Optional Termination)

24 NC No connection

SD (Send Data) and RD (Receive Data) are the same as TXD and RXD (used in the Series Six PLC).

(A) and (B) are the same as - and + A and B and denote outputs. A’ and B’ denote inputs.

E-16 Series 90™ Micro PLC User's Manual – June 1998 GFK-1065F

Caution

The signal ground connections (pin 7 on each connector) must be made between the

Isolated Repeater/Converter and the PLC for J1, and the Isolated Repeater/Converter and the host computer for J2.

Pin 7 of the J1 port is connected to the metal shell of the J1 connector. Pin 7 of the J2 port is connected to the metal shell of the J2 connector. These two signal ground connections are isolated from each other and from the power system ground (green wire on the terminal block). To maintain proper isolation, these signal grounds cannot be tied together.

E

Figure E-12. Example RS-422 Isolated Repeater/RS-232 Converter Connection

GFK-1065F Appendix E Converters E-17

E

System Configurations

The following figures show various ways you can connect the Isolated Repeater/Converter to convert signals, expand the number of drops, and obtain greater distance. Any system configuration can be reduced to a minimum number of cables, each covering a part of the overall system configuration. The following examples of system configurations refer to these cables as Cables A through E, which are described in “Cable Diagrams” on page E-20.

Downstream and Upstream Contention. In this section, simple multidrop configurations are those where a single Isolated Repeater/Converter is used. Complex multidrop configurations contain one or more multidrop sections where an Isolated Repeater/Converter is included as one of the drops. In both simple and complex multidrop configurations, the transmitters directed downstream from the master can be on at all times. There will be no contention for the communication line because only one device (the master) transmits downstream.

In simple multidrop configurations, there will be no contention when transmitting upstream as long as devices tri-state their drivers when idle and turn them on only when they have something to transmit. This is the case for the Series 90-70 and Series 90-30 CMMs.

In complex multidrop configurations, however, special steps must be taken to switch the upstream transmitters of the Isolated Repeater/Converter.

Switching Upstream Transmitters. For the RS-422 drivers to be active at the J2 port of the

Isolated Repeater/Converter, the RTS input at J1 must be true. The state of the RS-422 drivers at the J1 port depends on the position of the switch on the unit. When the switch is in the center position, the J1 transmitters will always be turned on. When the switch is in the CTS position

(toward the power cable), then either the RS-232 or RS-422 CTS signal must be true to turn on the

J1 drivers.

Note

Note the position of the switch on the Isolated/Repeater Converter in the following system configurations.

Simple Multidrop Configuration

This configuration shows how to connect a single Isolated Repeater/Converter for signal conversion or for greater distance.

a44927

Series 90 PLC or

Host

RS-232

(C able A)

R S-422

(Cable B)

J2

*

Brick

SW O N

J1

RS-422

(Cable D)

Series 90 PLC

Series 90 PLC

*

Brick is the nicknam e for the isolated repeater/converter

Figure E-13. Simple System Configuration Using the Isolated Repeater/Converter

E-18 Series 90™ Micro PLC User's Manual – June 1998 GFK-1065F

E

Complex Multidrop Configuration

This configuration shows how to connect multiple Isolated Repeater/Converters for signal conversion, greater distance, and more drops.

R S-422

(C ABLE C )

SER IES 90 PLC

SER IES 90 PLC

O R

HO ST

SER IES 90 PLC

RS-232

(C ABLE A)

RS-422

(C ABLE B)

J2

*

BRICK

SW O N

J1

R S-422

(CABLE D )

J2

*

BR IC K

SW O N

RS-422

(C ABLE D)

J1

SERIES 90 PLC

SERIES 90 PLC

J2

*

BRICK

SW O N

R S-422

(CABLE D )

J1 J2

*

BR IC K

SW O N

RS-422

(C ABLE D)

J1

SERIES 90 PLC

SERIES 90 PLC a44928

*

BRICK IS TH E N IC KNAM E FO R T HE ISO LATED

REPEATER /C O N VER TER

J1

*

BR IC K

SW C TS

R S-232

(CABLE E)

J2

SER IES 90 PLC

Figure E-14. Complex System Configuration Using the Isolated Repeater/Converter

Rules for Using Repeater/Converters in Complex Networks

When designing a complex multidrop network including PLCs and RS-422 repeater/converters

(bricks), the following rules apply:

Rule 1: When using a brick as a repeater, port J2 should always be directed toward the host device, and Port J1 should always be directed away from the host device. The switch located on the side of the brick should always be in the center position (ON). The only case in which Port J1 is directed toward the host is when the brick is used as a converter (RS-232) at the slave. The switch is in the right position (CTS).

Rule 2: If a Series 90 CMM slave device is located downstream of a brick, set the configuration of the CMM serial port to NONE flow control with a 10ms Modem Turnaround Delay (applies to

CCM, SNP, and SNP-X protocols only).

Rule 3: Do not place more than three bricks in a single communication path between the host and the slave devices.

GFK-1065F Appendix E Converters E-19

E

Cable Diagrams

Series 90

C MM

Port

1 or 2

The cable diagrams below are referred to as Cables A-E from the system configurations in the previous figures. These diagrams show the principles for constructing your own cables and can be modified to fit your specific application.

J2 SW O N a44929

J1

TD

RD

R TS

C TS

DC D

DTR

PIN

20

8

4

5

2

3

PIN

4

5

3

2

R D

SD

R TS

C TS

Isolated

Repeater/

Converter

(Brick)

25- pin

Fem ale

G N D

SHLD

25- pin

Male

7

1

Figure E-15. Cable A: RS-232 CMM To Converter

7 G ND

25- pin

Male

25- pin

Fem ale

J2 SW O N a44930

J1

Series 90

C MM

Port

1 or 2

25-pin

Fem ale

SD (A)

SD (B)

RD (A ')

RD (B ')

TER M

TER M

R TS (A)

C TS (A')

R TS (B)

C TS (B')

G ND

SH LD

25-pin

Male

PIN

10

11

22

23

9

21

13

25

12

24

7

1

*

*

PIN

10

12

11

13

7

16

17

15

14

19

18

25-pin

Male

*

Term inate connection: O n the C MM, Install jum per to connect internal 120 ohm resistor.

O n the isolated repeater/converter, install 150 ohm resistor (supplied).

RD (A')

RD (B')

SD (A)

SD (B)

TE RM

TE RM

RTS (B)

CTS (B')

RTS (A)

CTS (A')

G N D

Figure E-16. Cable B: RS-422 CMM To Converter

Isolated

R epeater/

C onverter

(Brick)

25-pin

F em ale

E-20 Series 90™ Micro PLC User's Manual – June 1998 GFK-1065F

SU BSTITU TE APP RO PRIATE UP STREAM DEVIC E

(W ITH IN DO TTE D B OX) PER SYSTEM DIAG RAM S.

SE R IE S 90

C M M

P O R T

1 O R 2

25- P IN

F EM A LE

SD (A )

SD (B )

R D (A')

R D (B')

TE R M

TE R M

R TS (A )

C TS (A')

R TS (B )

C TS (B')

G N D

S H LD

25- P IN

M AL E

P IN

2 4

1 0

1 1

2 2

2 3

2 1

9

1 3

2 5

1 2

7

1

*

SHIELDED

TW ISTE D

PAIRS

M AKE CO N NECTIO NS

INS ID E D -CO NN ECTO RS

P IN

1 3

2 5

2 1

9

2 4

1 0

1 1

2 2

2 3

7

1

R D (A ')

R D (B ')

SD (A )

SD (B )

TE R M

TE R M

R TS (A)

C TS (A')

R TS (B)

C TS (B')

0V

SH L D

25- P IN

M A LE

J2 S W O N

IS O LATE D

R EP E A TE R /

C O N V E R TER

(B R IC K)

J1

S D (A )

S D (B )

R D (A ')

R D (B ')

R TS (B)

C TS (B ')

R TS (A)

C TS (A ')

TER M

TER M

G N D

25- PIN

M A LE

23

7

PIN

10

13

11

22

16

17

15

14

12

*

150 O HM S

25- PIN

F EM A LE

NO TE

W HEN W IRING RS-422 /485 M ULTID RO PCABLES,

R EFLECTIO NS O N TH E TR ANSM ISSIO N LIN E C AN BE

R EDUC ED BY CO NFIG URIN G THE CABLE IN A DA IS Y

C HAIN FASHIO N AS SHO W N B ELO W .

M ASTER CM M SLAVE 1

*

150 OH M S

P IN

15

14

16

17

22

R D (A ')

R D (B ')

SD (A )

SD (B )

TE R M

23 TE R M

7 G N D

25- PIN

M A LE

P IN

16

17

15

14

19

R D (A ')

R D (B ')

SD (A )

SD (B )

TE R M

*

150 O HM S

18 TE R M

C M M SLAVE 3 CM M SLAVE 2

7 G N D

25- P IN

M AL E ALSO IT IS REC O M M ENDE D TO M AKE A NY NECE SSARY

C ON NEC TIO NS INSID E TH E C ABLE CO NN ECTO R TO BE

M O UN TE D ON THE CM M . IT IS NO T R ECO M M EN DED TO

U SE TER M INAL STRIPS O R OTH ER TYP ES O F

C ON NEC TO RS ALON G THE LEN G TH O F TH E

TRAN SM ISSIO N LINE.

TO O TH E R D EV IC E S

(M A XIM U M O F 8 D E V IC E S O N A M U L TID R O P)

TE R M IN ATE TH E R D (B ') S IG N A L

O N LY A T E N D O F M U LTID R O P C A B LE

*

TER M INATE CO NNE CTION O N FIRST AND LA ST DR O PS O NLY: O N THE CM M , INS TALL JUM PER TO C O NNEC T INTER NAL 120 O HM

R ESISTOR . O N TH E IS OLATED REPEATER /C ON VERTER , INSTALL 150 O H M R ESISTOR (SU PPLIED )

* *

O N THE CM M 311, O NLY PO RT 2 CAN SU PPO RT R S-422/RS-485.

Figure E-17. Cable C: RS-422 Twisted Pair

J2 S W O N J1

ISO LA TE D

R E PE A TE R /

C O N VE R TE R

(B R IC K )

(U S ED A S A

R E P E ATE R )

25- P IN

FE M A LE

S ER IE S 90

C M M

P O R T

I

O R

2

* *

25- P IN

F E M ALE

J1 S W C TS J2

ISO LA TED

R E P EA TE R /

C O N VE R TE R

(B R IC K )

(U S ED A S A

C O N VE R TE R )

25- P IN

FE M A LE a44931

E

GFK-1065F Appendix E Converters E-21

E

J2 SW ON J1

SHIELDED

TW ISTED

PAIRS

MAKE CONNECTIONS

INSIDE D-CONNECTORS

ISOLATED

REPEATER/

CONVERTER

(BRICK)

SD (A)

SD (B)

RD (A')

RD (B')

CTS (A')

CTS (B')

PIN

16

17

15

14

11

10

TERM

TERM

GND

22

23

7

*

150 OHMS

25- PIN

MALE

PIN

21

10

22

13

25

9

RD (A')

RD (B')

SD (A)

SD (B)

RTS (A)

RTS (B)

*

24

7

1

TERM

GND

SHLD

25-PIN

MALE

25- PIN

FEMALE

NOTE

W HEN W IRING RS-422 /485 MULTIDROPCABLES,

REFLECTIONS ON THE TRANSMISSION LINE CAN BE

REDUCED BY CONFIGURING THE CABLE IN A DAISY

CHAIN FASHION ASSHOW N BELOW .

MASTER CMM SLAVE 1

PIN

15

14

16

17

13

12

RD (A')

RD (B')

SD (A)

SD (B)

RTS (A)

RTS (B)

CMM SLAVE 3 CMM SLAVE 2

*

150 OHMS

22

23

7

TERM

TERM

GND

25-PIN

MALE

ALSO IT IS RECOMMENDED TO MAKE ANY NECESSARY

CONNECTIONS INSIDE THE CABLE CONNECTOR TO BE

MOUNTED ON THE CMM. IT IS NOT RECOMMENDED TO

USE TERMINAL STRIPS OR OTHER TYPES OF

CONNECTORS ALONG THE LENGTH OF THE

TRANSMISSION LINE.

PIN

14

11

10

16

17

15

RD (A')

RD (B')

SD (A)

SD (B)

RTS (A)

RTS (B)

* TERMINATE CONNECTION ON FIRST AND LAST DROPS ONLY:

ON THE CMM, INSTALL JUMPER TO CONNECT INTERNAL

120 OHM RESISTOR. ON THE ISOLATED REPEATER/CONVERTER,

INSTALL 150 OHM RESISTOR (SUPPLIED)

* *

ON THE CMM311, ONLY PORT 2 CAN SUPPORT RS-422/RS-485.

*

150 OHMS

19

18

7

TERM

TERM

GND

25-PIN

MALE

TO OTHER DEVICES

(MAXIMUM OF 8 DEVICES ON A MULTIDROP)

TERMINATE THE RD (B') SIGNAL ONLY AT END OF MULTIDROP CABLE

Figure E-18. Cable D: RS-422 Twisted Pair

SERIES 90

CMM

PORT

I

OR

2

* *

25-PIN

FEMALE a44932

J1

SW CTS

J2

ISOLATED

REPEATER/

CONVERTER

(BRICK)

(USED AS A

CONVERTER)

25-PIN

FEMALE

J2

SW ON

J1

ISOLATED

REPEATER/

CONVERTER

(BRICK)

(USED AS A

REPEATER)

25-PIN

FEMALE

E-22 Series 90™ Micro PLC User's Manual – June 1998 GFK-1065F

J1

S W C TS

J2

ISO LATED

R EP EATER /

C O N VE R TE R

(BR IC K )

SD

R D

PIN

2

3

C TS

G N D

5

7

25- PIN

F EM ALE

25- P IN

M ALE

Figure E-19. Cable E: RS-232 Converter to CMM

PIN

3

2

5

4

7

R D

SD

C TS

R TS

G N D

8

20

D C D

D TR

1 SH LD

25- PIN

M ALE

SE R IES 90

C M M

PO R T

1

O R

2 a45239

E

25- PIN

F EMA LE

GFK-1065F Appendix E Converters E-23

Appendix

F

Cable Data Sheets

Cables used with Series 90 Micro PLCs are described in this and other documents. This appendix provides a data sheet describing each of the Series 90 Micro PLC cable types so that all cable information can be found in one convenient location. Each data sheet contains the following information:

•

Cable name and function

•

Applicable catalog numbers

•

Hardware description of cable: connector types, cable type, other relevant hardware

•

Wiring diagram of cable

Information on the following cables is included in this appendix:

IC693CBL303

IC690CBL701

IC690CBL702

IC647CBL704

IC690CBL705

Micro PLCs

Hand-Held Programmer cable......................................................... F-2

PCM to Workmaster (IBM PC-XT) ................................................ F-4

PCM to IBM PC-AT ...................................................................... F-5

Workstation Interface board to Series 90 CPU................................. F-6

PCM to Workmaster II (IBM PS/2)................................................. F-7

2-Wire Cable Diagrams .................................................................. F-8

GFK-1065F F-1