Extron Electronics MPX Plus 866 A Rev. B - Manual (Page 26)

Installation, cont’d
MPX Plus 866 A Media Presentation Matrix Switcher • Installation 2-6
PRELIMINAR
Y
Mic/line audio input group
i
Connections for mono audio inputs — Each input, numbered 15 through
18, has a 3-pole, 3.5 mm captive screw connector for mono audio input.
Connectors are included with the switcher, but you must supply the audio cable.
See figure 2-5 to wire a connector for mono audio input. Use the supplied tie-
wrap to strap the audio cable to the extended tail of the connector.
Mic Input Wiring
(balanced, mono) Mic Input Wiring
(unbalanced, mono)
Tip (+)
Jumper
Gnd (Sleeve, )
Tip ( +)
Ring ( –)
Gnd (Sleeve, )
Do not tin the wires!
Figure 2-5 — Captive screw connector wiring for mono audio inputs
N The length of exposed wires is critical. The ideal length is 3/16 ” (5 mm).
• If the stripped section of wire is longer than 3/16 ”, the exposed wires may
touch, causing a short circuit between them.
• If the stripped section of wire is shorter than 3/16 ”, wires can be easily pulled
out even if tightly fastened by the captive screws.
j
Phantom +48 V LEDs — These four LEDs, numbered 15 through
18, light to indicate that +48 V phantom power is applied to the
associated mic/line inputs.
Audio outputs
k
Connections for balanced and unbalanced audio outputs — These 5-pole,
3.5 mm captive screw connectors output the selected unamplified, line level
audio. Connect audio devices, such as an audio amplifier or powered speakers.
See figure 2-6 to properly wire an output connector. Use the supplied tie-
wrap to strap the audio cable to the extended tail of the connector.
Unbalanced Stereo Output Balanced Stereo Output
L
R
Do not tin the wires!
Ring
Sleeve(s)
Tip
Tip
Ring
Sleeve(s)
Tip
Tip
NO GROUND HERE.
NO GROUND HERE.
Figure 2-6 — Captive screw connector wiring for stereo audio output
C For unbalanced audio, connect the sleeve(s) to the ground contact. DO
NOT connect the sleeve(s) to the negative (-) contacts).
N The length of exposed wires is critical. The ideal length is 3/16 ” (5 mm).
• If the stripped section of wire is longer than 3/16 ”, the exposed wires may
touch, causing a short circuit between them.
• If the stripped section of wire is shorter than 3/16 ”, wires can be easily pulled
out even if tightly fastened by the captive screws.
PHANTOM
+48V
15 16
17 18