Rockwell Automation 1203-CN1 ControlNet Communications Module 1203-CN1 - Manual (Page 25)

Publication 1203-5.13 – February, 2002
Installation 2-5
3. Hook the top lip of the module’s DIN rail mount onto the top of
the DIN rail and then rotate the module onto the DIN rail. You
will hear the module snap into a locked position.
Figure 2.2
Connecting the Module to the DIN Rail
4. Verify the module is correctly grounded to the DIN rail by using
an Ohm meter to measure between:
• DIN rail’s earth ground.
• Metal shell in the module’s RS-232 serial port.
If the reading is greater than 2 Ohms, you must reconnect the
module to the DIN rail, making sure it attaches securely.
Figure 2.3
Metal Shell of the Module’s RS-232 Serial Port