Rockwell Automation 2706-F11J_F11JC_F21J_F21JC DL50 INSTALLATION MANUAL - Manual (Page 50)

Chapter 4
Installing the DL50
4–25
Use the Flexible Interface Module with either the Catalog No. 2760-SFC1 or
2760-SFC2 cartridge with Dumb Terminal (DT) protocol. Multidrop up to 31
DL50’s on each of the three communications ports on the module.
Figure 4.21 shows how to connect the RS-485 port of the DL50 to a Flexible
Interface Module RS-422 port.
Figure 4.21
RS-485 Connection to a Flexible Interface Module
To
Other
DL50s
1
2
4
5
6
1
+
–
SHLD
+
–
SHLD
DL50
RS-485
TERMINALS
DL50
RS-485
TERMINALS
2
4
5
6
FLEXIBLE
INTERFACE
MODULE
(RS-422)
3 COM COM 3
Shield
Common
RS-485 (+)
1
+
–
SHLD
DL50
RS-485
TERMINALS
2
4
5
6
COM 3
RS-485 (–)
Flexible Interface Module
Network Termination
Terminate RS-422 network at
Flexible Interface Module.
Refer to User Manual.
Shield
Grounding
Connect shield (terminal #2) to
ground (terminal #1) at any one node
(only) on RS-422 Network.
Network
Termination
Terminate last DL50 by connecting
RS-422 + (terminal #4) to
TERM (terminal #6)
1
+
–
SHLD 2
4
5
6
COM 3
TERM
E. GND
1
+
–
SHLD 2
4
5
6
COM 3
TERM
E. GND
Flexible Interface Module
Catalog No. 2760-RB