8
4.4 Replacing the MJ-X
L
Rear Cover
Remove the adhesive strip covering the rectangular opening for the RS-232/485 Connector, and remove the two
plastic caps covering the holes for the Fiber Optic "In" and "Out" connectors. If you are installing the RS-232/485
version, remove the plugable 8-pin terminal block connector from the communications module before replacing the
rear cover. Make sure that all of the cables and wires are inside the enclosure and carefully place the rear cover
over the communications module and main PCB and fasten with the four case screws. Uncurl the cable clamp and
slide the cable into place.
4.5 Mounting the Communications Module Label
Carefully punch out the indicator and connector holes in the communications module label. Carefully remove the
backing from the label and place it on the rear cover. Make sure that the holes in the label are lined up with the
indicator and connector holes on the rear cover. When the label is in place, rub the label to secure it in position.
The rear cover with labels installed is shown in Figures 4-5 and 4-6 below.
In
Out
Rxd
Txd
POWER
Watchdog
Communications
Fiber Optic
Communications Module
Figure 4-5 MJ-X
L
with Fiber Optic Label Installed
Rxd
Txd
POWER
Watchdog
Communications
RS - 232 / 485
Communications Module
G
N
D
R
T
N
-
+
R
x
d
T
x
d
C
T
S
R
T
S
Data
Figure 4-6 MJ-X
L
with RS-232/485 Label Installed
