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MMX 32 VGA MTP • Installation and Operation 8
Power Connection
i Power connector — An external 12 VDC power supply is included with the unit. Plug it
into this 2-pole 3.5 mm captive screw connector. Wire the connector as shown in
figure 8.
Power Supply
Output Cord
SECTION A–A
Ridges
Smooth
AA
Tie Wrap
G
Figure 8. Power Connection Wiring
CAUTION: Power supply voltage polarity is critical. Incorrect voltage polarity can
damage the power supply and the MMX. Identify the power cord negative
lead by the ridges on the side of the cord (figure 8).
CAUTION: The length of the exposed (stripped) copper wires is important. The ideal
length is 5/16 inches (7 mm). Longer bare wires can short together.
Shorter wires are not as secure in the captive screw connectors and could
be pulled out.
NOTE: Do not tin the stripped power supply leads before installing the captive screw
connector. Tinned wires are not as secure in the captive screw connectors and
could be pulled out.
To verify the polarity before connection, plug in the power supply with no load and check
the output with a voltmeter.
WARNING: The two power cord wires must be kept separate while the power supply is
plugged in. Remove power before wiring.
As an alternative, an Extron P/S 123 Universal 12 V DC Power Supply, part number
60-814-01, can power multiple MMXs or other Extron 12 V DC devices, using only one AC
power connector.
CAUTION: Do not daisy chain power to this unit.