Table 38 - Scanner Module Replacement - Honeywell 900U02-0100 User And Installation Manual

Replacing the Scanner Module
Removing and replacing the Scanner Module from an I/O expansion rack (C50, C70, C75 CPU
controllers only) requires that the source of AC power is removed from the rack. Removing power from
the Expansion rack has the following consequences:

All power to all I/O modules in the rack will be lost; hence all control outputs from the rack to
the process are lost.

Redundant controllers will operate with the affected I/O in failsafe state during Scanner2
module replacement

Does not impact other I/O Racks in the same configuration
Step Action
1. If a process is currently in operation, then:


2. Using an external (user-supplied) switch, disconnect the power supply or supplies in the
expansion rack from the site AC power source.
3. Unplug the cable(s) from the scanner port(s).
4. At the top and bottom of the Scanner Module, loosen the captured screws that secure the
module in the rack, and remove the module from the rack.
5. Configure the scanner address jumpers/DIP switches on the replacement module to
match those of the removed module.
6. Ensure that the new Scanner Module is properly aligned with the slot guides, insert the
new Scanner Module in the rack, and secure it in place with the captured screws at top
and bottom of the module.
7. Re-install the cable(s).
8. Using the external (user-supplied) switch, connect the power supply or supplies in the
expansion rack to the site AC power source. The Scanner Module should resume
communications with I/O modules in the rack and with the Controller Module with
which it is connected.
9. Check status indications at the Scanner Module, at the Controller Module, and at the OI.
Replacing an I/O Module
CAUTION
Read and understand all of the following information regarding RIUP before attempting to
remove and/or replace any I/O module, particularly in a system that is actively controlling a
process.
214 ControlEdge HC900 Process & Safety Controller User and Installation Manual
Table 38 – Scanner Module Replacement
Either ensure that powering-down the expansion rack will not have adverse
consequences on any running process, or
bring the process to a safe and orderly shutdown.
Revision 10
May 2019