Installation
• Installation should not be attempted without refer
ring to the applicable Programmable Controller
Installation Manual (see reference 5).
• Make sure rack power is off.
• Install expansion memory if required.
• Connect the battery to either of the battery con
nectors on the module. (See figure 2)
• Install in the rack. (See figure 1)
• Turn on power.
The module should power up and blink the top LED.
When the diagnostics have completed successfully the
top LED stays on.
Expansion Memory
The PCM can operate with or without an expansion
memory daughter board. The base memory on the
PCM board has up to 95 Kbytes user memory. The ex
pansion memory daughter board permits expansion of
program/data memory by 64. 128. 256 or 512 Kbytes.
The battery which supports this memory is located on
the base board housing as shown in figure 2.
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