Rockwell Automation 1762-Lxxxx MicroLogix 1200 Programmable Controllers - Manual (Page 70)

Publication 1762-UM001G-EN-P - March 2011
4-4 Communication Connections
Connect to the RS-232 Port There are two ways to connect the MicroLogix 1200 programmable controller
to your personal computer using the DF1 protocol: using a point-to-point
connection, or using a modem. Descriptions of these methods follow.
ATTENTION
All devices connected to the RS-232 channel must be
referenced to controller ground, or be floating (not
referenced to a potential other than ground). Failure
to follow this procedure may result in property
damage or personal injury.
• For 1762-L24BWA, 1762-L40BWA, 1762-L24BWAR
and 1762-L40BWAR controllers:
The COM of the sensor supply is also connected
to chassis ground internally. The 24V dc sensor
power source should not be used to power
output circuits. It should only be used to power
input devices.
• For 1762-L24BXB, 1762-L40BXB, 1762-L24BXBR
and 1762-L40BXBR controllers:
The VDC NEUT or common terminal of the
power supply is also connected to chassis ground
internally.
Table 4.2 Available Communication Cables
Communication Cables Length
1761-CBL-PM02 series C or later 2 m (6.5 ft)
1761-CBL-HM02 series C or later 2 m (6.5 ft)
1761-CBL-AM00 series C or later 45 cm (17.7 in)
1761-CBL-AP00 series C or later 45 cm (17.7 in)
2707-NC8 series A or later 2 m (6.5 ft)
2707-NC9 series B or later 15 m (49.2 ft)
2707-NC10 series B or later 2 m (6.5 ft)
2707-NC11 series B or later 2 m (6.5 ft)