G&L MMC-A2, Hardware Manual

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Installation, Operation, & Maintenance
18 MMC Hardware Manual G & L Motion Control Inc.
spots do not exceed specifications. For example, when heat-
generating components such as transformers, drives or motor
controls are installed, separate them from the system by doing one
of the following:
• Place them near the top of the control cabinet so their heat
output rises away from the MMC.
• Put them in another control cabinet above or to one side of
the cabinet with the MMC. This protects the MMC from
both heat and electrical noise.
The MMC itself is a source of heat, though in most installations its
heat dissipates without harmful effects. System heat is generated
from power dissipated by:
• field side input/output components
• other components within the MMC
3.4.6 Handling an MMC
The case protects the MMC’s internal circuitry against mechanical
damage in shipping and handling. However, like any electronics
device, the circuitry can be destroyed by:
• temperatures over 55° C (131° F)
• moisture condensing inside the module
• static discharge
• exposure to a magnetic field strong enough to induce a cur-
rent in the circuitry
• freezing temperatures, vibration, and other hazards
Normally there is no need to open the case. Occasionally, a battery
must be replaced. A diagram and detailed anti-static precautions in
CAUTION
If the MMC is operated outside the recommended limits,
it may be damaged. This will void the warranty.