G&L MMC-A2, Hardware Manual

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Installation, Operation, & Maintenance
G & L Motion Control Inc. MMC Hardware Manual 17
• AC common line from the noise filter, if any.
• The ground of the power source of the computer worksta-
tion, if any, from which you monitor the system operation.
An AC outlet in the control cabinet is recommended.
• Single point grounds from other control cabinets, if any, in
the system.
3.4.5 Controlling Heat Within the System
The MMC hardware case is designed to promote air circulation and
dissipate heat. The MMC must be mounted vertically to take
advantage of this design. Normally no fans or air conditioners are
needed. However, if the environment outside the control cabinet is
hot or humid, you may need to use a fan, heat exchanger,
dehumidifier or air conditioner to provide the correct operating
environment.
Table 3-1: Operating Limits for the MMC
Make sure that components installed in the cabinet with the MMC
do not raise the temperature above system limits and that any hot
IMPORTANT
You must ensure that the “0V” or “Common” of all devic-
es connected to the MMC are connected to Single Point
Ground (SPG). Failure to do so may result in erratic oper-
ation or damage to the MMC. Examples of devices con-
nected to the MMC include the power source that supplies
24VDC power to the MMC and devices connected to the
MMC PiCPro Port or User Port. Note that some devices
(for example, a Personal Computer) may have their “0V”
and “Chassis” connected together internally, in which
case only one connection has to be made to SPG for that
device.
Also, you must ensure that the MMC “Chassis” connec-
tion is connected to SPG, and that the MMC is mounted
to a metal panel or enclosure that is connected to SPG.
Temperature 5 to 55° C (41 to 131° F)
Relative humidity 5 to 95%, non-condensing