Emerson IM-106-4050 MICROLOGIX 1200 PROGRAMMABLE CONTROLLERS, PLC Removal, Instruction Manual

Instruction Manual

IM-106-4050 Original Issue March 2006

OxyBalance Oxygen Display and Averaging System

MICROLOGIX 1200 PROGRAMMABLE CONTROLLERS

The MicroLogix 1200 Programmable Controllers consist of one PLC unit and three I/O modules. The PLC mounts horizontally with the expansion I/O modules extending to the right of the controller.

This equipment is intended for use in clean, dry environments where only non-conductive pollution occurs (except occasionally a temporary conductivity caused by condensation), and with circuits not exceeding Over Voltage Category II (IEC 60664-1).

Electrostatic discharge can damage semiconductor devices inside the controller. Do not touch connector pins and other sensitive areas.

PLC Removal

Disconnect all power before installing or replacing components. Failure to disconnect power may result in electrical shock and/or damage to the equipment.

NOTE

Make sure to carefully record the wiring connections and locations before disconnecting. This will aid in the installation of the unit.

1.Tag and disconnect all wiring from the MicroLogix PLC.

2.Remove the cover from the ribbon cable connector on the PLC. Use the pull loop on the connector to disconnect the ribbon cable from the PLC. Do not pull on the ribbon cable. See Figure 5-4.

3.Place a flat-blade screw driver in the DIN rail tab at the bottom of the controller, see Figure 5-5.Holding the PLC, pry downward on the tab until the tab locks in the open position.

4.Repeat step 3 for the second DIN rail tab.

5.Pull the bottom of the PLC out and away from DIN Rail, as shown in Figure 5-6.When the bottom of the PLC is free from the DIN rail, lift up on the PLC until the top is also free of the DIN rail. Remove the PLC from the OxyBalance enclosure.

5-6