Description
About 1734-EP24DC | 24V DC Power/Bus Extension Module:
The expansion power supply passes 24V DC field power to the I/O modules to the right of it. The expansion power supply extends the backplane bus power for up to 17 I/O modules to the right of the supply and creates a new field voltage partition segment for driving field devices. The expansion power supply separates field power from I/O modules to the left of the unit, effectively providing functional and logical partitioning for the following.
- Separate field power between input and output modules.
- Separate field power to the analog and digital modules.
- Group modules to perform a specific task or function.
The dark-gray color of the expansion power supply allows for easy visual inspection and identification. Refer to the figure to identify external power supply components.
Use multiple expansion power supplies with POINT I/O adapters to assemble a full system. With any POINT I/O adapter, use an expansion power supply to add additional modules in 4...17 module increments, for a total of 63 I/O modules.
Install the Power Supply:
To install the expansion power supply on the DIN rail, proceed as follows.
- Position the power supply vertically above the DIN rail.
- Engage the interlocking side pieces with the unit on the left.
- Press down firmly to install the power supply on the DIN rail. The locking mechanism locks the module to the DIN rail.
Remove the Power Supply:
To remove an expansion power supply, proceed as follows.
- Pull up on the RTB removal handle to remove the terminal block.
- Remove the module to the right of the 1734-EP24DC or 1734-EP24DCK module from its base unit.
- Use a small-bladed screwdriver to rotate the DIN rail locking screw to a vertical position. This releases the locking mechanism.
- Lift straight up to remove.
Replace the Power Supply:
To install a replacement expansion power supply, proceed as follows.
- Pull up on the RTB removal handle to remove the terminal block. Remove the module to the right of the power supply from its base unit.
- Position the power supply vertically above the DIN rail.
- Slide the power supply down allowing the interlocking side pieces to engage the adjacent modules (both left and right sides).
- Press firmly to seat the power supply on the DIN rail. The power supply locking mechanism snaps into place.
- Reinsert the module into the base next to the expansion power supply.
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