Rockwell Automation 2706-F11J_F11JC_F21J_F21JC DL50 INSTALLATION MANUAL - Manual (Page 45)

Chapter 4
Installing the DL50
4–20
Figure 4.17
Personal Computer to DL50 RS-485 Port(s)
Signal Ground
Receive
Transmit
5
3
2
Computer
RS-232 port
DB-9 Connector
1
2
3
4
5
6
+
–
SHLD
COM
DL50
RS-485
TERMINALS
2
3
7
NOTE: CONNECT SHIELD TO EGND AT
ONE NODE ONLY
TERM
RxB
RxA
TxB
TxA
RS-485
Shield
DB-25
RS-232
Black Box LD485A-MP
Note: Allen-Bradley 2706-NC15 cable will
connect directly from a personal computer
serial port (male DB-9) to the Black Box
LD485A-MP.
EGND
Black Box LD485A-MP Configuration
Configure the Black Box (LD485A-MP) converter as follows:
1. Remove cover and set the converter as a DCE device using the XW1A
jumper. This is a 16-pin DIP jumper.
2. Short TxA and RxA on TB1 of the converter.
3. Short TxB and RxB on TB1 of the converter.
4. Set jumper W8 to half-duplex operation.
5. Set jumper W9 for a 50 millisecond RTS/CTS delay time.
6. Set jumper W15 to B-C for data enabled operation.
7. Set jumper W16 to A-B for 5 millisecond turnaround delay.
8. Set jumper W17 to A for 1 millisecond driver delay.
9. Set jumper W18 to A-B for DTR enabled driver.
10.Set switch S2 to the unterminated position.
11. Replace cover.
12.Set Normal/Loopback switch on front panel to Normal.
!
ATTENTION: The two jumpers to short TxA to RxA and TxB
to RxB are essential for converter function. See steps 2 and 3
above, and Figure 4.17.