Specifications

116 Chapter 9
XMU+ Hardware Upgrades
Upgrading Control Card Memory
A XMU+ memory module can be added if more memory is required (up to a
maximum of 6 hours). Memory may also need to be replaced due to:
 Additional memory requirements for storing messages (up to a maximum of 6
hours).
 A defective memory module.
The Control card location reserved for a memory module is labelled as Memory
Module 1.
Note: Due to the required factory startup after each memory upgrade or replacement,
it is important to back up configurations and messages before working with XMU+
memory modules.
To replace an XMU
+
memory module
A memory module may need to be replaced due to:
 Additional memory requirements (up to a maximum of 6 hours).
 A defective memory module.
1. Back up the configuration and messages contained within the XMU+.
See To back up the current configuration on page 108.
2. Take the XMU+ offline and power down. See To take the XMU+ offline on page
107 and To power dow n th e XMU+ on page 108.
3. Remove the Control card. See To remove the Control card on page 112.
The XMU+ will have one, two, or three memory modules installed in the
sockets near the top edge of the Control card.
4. Gently pull up on the memory module to be removed. A slight rocking motion
may be needed to disengage it.
5. Align the new module for mounting.
Several measures exist to prevent improper installation, including:
 White alignment arrows on both the Control card and memory module
should point in the same direction.
 The large central hole in the memory module should engage with the
plastic retainer on the Control card.