USER MANUAL User guide

Publication 2706-6.3

DL40 Plus Slave to a Computer using an RS-485 Converter Box

If you are using a personal computer to send messages to the DL40

Plus Slave using the RS485 port, refer to the following diagram:

Note: When using the Black Box RS-485 Converter (LD-485A-MP):

• Set the RTS/CTS delay time to 5 milliseconds using jumper

W9.

• Set Switch S2 to the unterminated position.

• If the RS-485 Driver Enable is set to “Enable When Data is

Received on the RS-232 Port” (Jumper W15 in the B-C

position), set the “Disable Timeout Delay” to 100 msec or

greater (Jumper W17) when communicating at lower Baud

rates (300 or 1200 Baud).

• You can use a programming cable (Catalog No. 2706-

NC15) to connect the computer serial port to the RS-485

converter box.

RS-485 Converter Box

(

Model LD-485A-MP

)

DL40-Plus Slave

Displa

- RS-485 Port

RS-232 IN

CH-B

RS-232 Ground

Term

CH-A

Comm

Shield

E-Ground

Monitor

RS-485 OUT

P.C. RS-232

Serial Port

RXB

RXA

TXA

TXB

Sheild

5- Ground

3- TXD

2- RXD

Computer