Retained slot identity

The module holds the address and slot number used by a purchased POINT I/O module set. This keeps the intended numbering scheme in place while the corresponding non-parameterized signal module is absent from the assembly.

When a signal module is installed again, its structure and address location are retained rather than reassigned by the temporary gap. The reserve module therefore occupies an organizational role in the I/O assembly.

Clear functional boundary

1734-ARM does not provide module configuration and does not communicate I/O data. It is not a substitute for a signal module when a process signal must be read or an output must be controlled.

• Reserves a POINT I/O address and slot
• Supports the numbering of a purchased I/O module set
• Retains the removed signal module’s location
• Does not add I/O data communication

Compatible base families

The module is used with 1734-TB, 1734-TBS, 1734-TOP, or 1734-TOPS terminal bases. The base installed at the location remains part of the POINT I/O mounting arrangement, so the selected reserve module must match the documented assembly position.

Before inserting the reserve module, identify the base part number already assigned to that location. This avoids treating the address reserve function as permission to interchange unrelated POINT I/O mounting hardware.

Keyswitch continuity

Use the keyswitch position of the removed module. Retaining that setting keeps the mechanical position aligned with the module location that the reserve module is holding.

The keyswitch check belongs to the replacement preparation sequence: record the removed module’s position, keep the compatible terminal base in place, and then seat the reserve module in the reserved slot.