Automationdirect.com DirectLOGIC DL205 Series User Manual page 172

Chapter 4: System Design and Configuration
D2–EM Local Expansion Module
1
The D2–EM expansion unit is attached to the right side of each base in the expansion
system, including the local CPU base. (All bases in the local expansion system must be the
new (–1) bases). The D2–EMs on each end of the expansion system should have the TERM
2
(termination) switch placed in the ON position. The expansion units between the endmost
bases should have the TERM switch placed in the OFF position. The CPU base can be
3
located at any base position in the expansion system. The bases are connected in a
daisy–chain fashion using the D2–EXCBL–1 (category 5 straight–through cable with RJ45
connectors). Either of the RJ45 ports (labelled A and B) can be used to connect one
4
expansion base to another.
5
6
7
8
The status indicator LEDs on the D2–EM front panels have specific functions which can
9
help in programming and troubleshooting.
10
ACTIVE (Green)
11
WARNING: Connect/disconnect the expansion cables with the PLC power turned OFF in order for the
ACTIVE indicator to function normally.
12
D2–EXCBL–1 Local Expansion Cable
13
The category 5 straight–through D2–EXCBL–1 (1m) is used to connect the D2–EM
expansion modules together. If longer cable lengths are required, we recommend that you
14
purchase a commercially manufactured cable with RJ45 connectors already attached. The
maximum total expansion system cable length is 30m (98ft.). Do not use Ethernet hubs to
connect the local expansion network together.
A
B
C
D
NOTE: Commercially available Patch (Straight–through) Category 5, UTP cables will work in place of the
D2–EXCBL–1. The D2–EM modules only use the wires connected to pins 3 and 6 as shown above.
4–12
DL205 User Manual, 4th Edition, Rev. B
D2–EM Indicator
ON
OFF
1 2 3 4 5 6 7 8
8-pin RJ45 Connector
(8P8C)
Status
D2–EM is communicating with other D2–EM
D2–EM is not communicating with other D2–EM
D2–EXCBL–1 Cable
1
2
GRN/WHT
3
4
5
GRN
6
7
8
RJ45
Meaning
1
2
GRN/WHT
3
4
5
GRN
6
7
8
RJ45