Rockwell Automation 1769-SM2 Compact I/O DSI/Modbus Network Communication Module - Manual (Page 5)

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e. Place the modules back on the panel, and check for proper hole
alignment.
f. Attach the modules to the panel using the mounting screws.
B. DIN Rail Mounting — The 1769-SM2 module can be mounted using
the following DIN rails:
• 35 x 7.5 mm (EN 50 022 - 35 x 7.5)
• 35 x 15 mm (EN 50 022 - 35 x 15)
Before mounting the module on a DIN rail, close the DIN rail latches.
Press the DIN rail mounting area of the module against the DIN rail.
The latches will momentarily open and lock into place.
Step 5 Replacing the module within a system. The 1769-SM2 module can be
replaced while the system is mounted to a panel (or DIN rail).
A. Remove power.
B. Unplug the communications cable from each port (CH1, CH2, CH3) on
the 1769-SM2 module. Note each drive and the port to which it is
connected.
C. Remove the upper and lower mounting screws from the module (or
open the DIN latches using a flat-blade screwdriver).
D. On the right-side adjacent module, move its bus lever to the right
(unlock) to disconnect it from the module being removed.
E. Gently slide the disconnected 1769-SM2 module forward. If you feel
excessive resistance, make sure that you disconnected the module from
the bus and that you removed both mounting screws (or opened the DIN
latches).
!
ATTENTION: Risk of equipment damage exists. Remove
power before installing or removing the 1769-SM2 module.
When you install or remove the module with power applied, an
electrical arc may occur. An electrical arc can cause personal
injury or equipment damage by:
• Sending an erroneous signal to your system’s filed devices,
causing unintended machine motion.
• Causing an explosion in a hazardous environment.
Electrical arcing causes excessive wear to contacts on both the
module and its mating connector. Worn contacts may create
electrical resistance.
TIP: It may be necessary to slightly move the module from
front to back to remove it, or in a panel-mounted system, to
loosen the screws of adjacent modules.