PVS 405D • Connector Wiring 47
Power Supply Wiring
NOTE: Use only the supplied 12 V, 4 A power supply for this switcher. The PVS 405D power supply can support a
typical system: for example, a PVS 405D, 2 PVT Wallplates, 2 or 4 speakers, an MLC 104 IP Plus with an
IRCM DV+, and a VoiceLift Microphone system. If an additional SCP 104 is used, the MLC 104 IP Plus MUST
have its own power supply.
Figure 31 shows how to wire the connector.
SECTION A–A
Power Supply
Output Cord
Captive Screw
Connector
Ridges
Smooth
3/16"
(5 mm) Max.
Figure 32. Power Connector Wiring
WARNING: The two power cord wires must be kept separate while the power
supply is plugged in. Remove power before wiring.
ATTENTION:
• Always use a power supply supplied and or specified by Extron. Use of an
unauthorized power supply voids all regulatory compliance certification and may
cause damage to the supply and the end product. Unless otherwise stated, the
AC/DC adapters are not suitable for use in air handling spaces or in wall cavities.
The installation must always be in accordance with the applicable provisions of
National Electrical Code ANSI/NFPA 70, article 75 and the Canadian Electrical
Code part 1, section 16. The power supply shall not be permanently fixed to
building structure or similar structure.
• Power supply voltage polarity is critical. Incorrect voltage polarity can damage
the power supply and the unit. The ridges on the side of the cord (see figure 32)
identify the power cord negative lead.
• To verify the polarity before connection, plug in the power supply with no load
and check the output with a voltmeter.
• The length of the exposed (stripped) copper wires is important.
The ideal length is 3/16 inch (5 mm). Longer bare wires can short together.
Shorter wires are not as secure in the connectors and could be pulled out.
NOTE: Do not tin the power supply leads before installing them in the direct insertion
connector. Tinned wires are not as secure in the connectors and could be pulled out.
