Removing or Replacing a RAN

This procedure allows you to remove or replace a remote asynchronous node (RAN) from your system.

If a particular RAN is turned off or removed from the daisy chain, the 16 ports on that RAN become unavailable to the system, leaving the rest of the system unaffected.

Because the RANs IN and OUT/T ports are of opposite gender, a RAN can be removed from the middle of a daisy chain by plugging the cables together so that the chain remains unbroken.

Prerequisites

1. Make sure the power switch on all RANs is in the Off (O) position.
2. Unplug the AC connector of the power supply from the wall outlet. Unplug the DIN connector from the receptacle on the RAN.

Remove a RAN

1. Disconnect the cables from the RAN.
2. Reconnect other RANs (if any) to complete the daisy chain.
3. Ensure that the terminator plugs on the OUT/T port of the last RAN.
4. Reconfigure the adapter using cfgmgr -l (adapter name).

Replace a RAN

1. Disconnect the cables from the RAN to be removed.
2. Connect the new RAN. Refer to "Connecting a RAN to a 128-Port Asynchronous Adapter".
3. Ensure that the terminator plug is on the OUT/T port of the last RAN.
4. Turn the RAN's power switch to the On ( | ) position. The lights on the front panel should flash as the RAN executes its power-on self-test (POST) sequence, and the seven-segment LED display will display P1 to indicate that the POST sequence has completed successfully.
5. Set the node number of the new RAN. Refer to "Setting a RAN Node Number".
6. Reconfigure the adapter using cfgmgr -l (adapter name).