Connections

 

 

 

Section 8-3

 

 

 

 

 

 

 

 

Port 1

Port 2

Bit(s)

Setting

Function

 

 

 

 

 

 

 

DM 6556

DM 6551

00 to 15

---

Not used.

 

 

 

 

 

 

 

 

DM 6557

DM 6552

00 to 15

 

 

 

 

 

 

 

 

 

 

 

DM 6558

DM 6553

00 to 15

 

 

 

 

 

 

 

 

 

 

 

DM 6559

DM 6554

00 to 15

 

 

 

Port Settings are always the same for 1:1-mode NT Links. Settings of the start bits, stop bits, parity, and baud rate are not necessary and will be ig- nored.

Set the communications mode to a 1:1-mode NT Link (4 Hex).

6.Operate the system.

Refer to the operation manual for your PT for operating instructions.

8-3 Connections

The connection examples in this section show only the basic connection dia- grams. We recommend that appropriate noise countermeasures be taken in ac- tual applications, including the use of shielded twisted-pair cables. Refer to 2-3 Wiring for actual wiring methods.

Direct 1:1 Connection from RS-232C to RS-232C Ports (1:1 or 1:N Mode)

Serial Communications

Board

Signal Pin

FG Hood

FG

SD

RS-232C RD

Interface RTS

CTS 5V DSR DTR SG

D-sub, 9-pin connector (male)

PT

Pin Signal

Hood FG

--

SD

RD RS-232C

RTS Interface

CTS 5V

--

--

SG

D-sub, 9-pin connector (male)

Communications Mode: 1:1 or 1:N-mode NT Link

OMRON Cables with Connectors:

XW2Z-200T-1: 2 m

XW2Z-500T-1: 5 m

Direct 1:1 Connection from RS-422A/485 to RS-422A/485 Ports (1:1 or 1:N Mode)

Serial Communications

Board

 

Short piece

 

Signal

 

Signal Pin

RS-422A/

 

485 Inter-

RS-422A/

face

485 Inter-

 

 

face

 

Hood

D-sub, 9-pin connector (male)

Functional ground

Terminal block or D-sub connector

Communications Mode: 1:1 or 1:N-mode NT Link

Note Serial Communications Board settings: Terminating resistance ON, 4-wire.

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Omron CQM1H-SCB41 operation manual 117