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Instruction Manual 
IM-106-4050 Original Issue
March 2006
5-9
 
OxyBalance Oxygen Display
and Averaging System
I/O Module Removal
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 I/O module.
2. Remove the cover from the ribbon cable connector on the module to the 
left of the module to be removed. Use the pull loop on the connector to 
disconnect the ribbon cable from that module. Do not pull on the ribbon 
cable. See Figure 5-4.
3. If necessary, remove the cover from the ribbon cable connector on the 
module to be removed. Use the pull loop on the connector to disconnect 
the ribbon cable. Do not pull on the ribbon cable.
4. Place a flat-blade screw driver in the DIN rail tab at the bottom of the I/O 
module. Holding the module, pry downward on the tab until the tab locks 
in the open position.
5. Pull the bottom of the I/O module out and away from the mounting plate 
inside the enclosure. When the bottom of the module is free from the 
DIN rail, lift up on the module until the top is also free of the DIN rail. 
Remove the module from the OxyBalance enclosure.
I/O Module Replacement
Mounting Procedures
1. Place the top of the I/O module over the top of the DIN rail, with the 
bottom fo the module tilted away from the DIN rail.
2. When the top of the module engages the DIN rail, pivot the bottom of 
the module in toward the DIN rail.
3. Using a screwdriver, push the DIN tab up until it snaps into position, 
holding the module tight against the DIN rail.
4. Attach the flat ribbon cable from the I/O module to the PLC or module to 
the left. Install the ribbon cable cover.
5. If necessary, attach the ribbon cable from the I/O module to the right, to 
the module being installed. Install the ribbon cable cover.
6. Ensure the end anchors are tight
7. Connect the wiring to the I/O Module that was removed in step 1 of "I/O 
Disconnect all power before installing or replacing components. Failure to disconnect power 
may result in electrical shock and/or damage to the equipment.