Grounding Options
Normalling Options
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Sleeve Normalling

SHORTI Chassis with 3-Pin. (WEP-262-SHSN)

Patchbays with sleeve-normalling jacks are more essential these days, due to increased use of condenser microphones (which require a constant power supply). These microphones receive their required DC Power supply through the balanced audio signal lines and the ground line of the microphone cord. Voltage is applied to both the hot(+) and cold(-) wires, and is returned to the power supply by the shield (ground) wire. This method of supplying power to a microphone is known as phantom power

In a typical normalled patchbay, only Tip and Ring normals are needed for a normal path (see p. 6), and the sleeves are either bussed or ignored. When making a connection requiring phantom power through a normalled patchbay, you need to provide that channel with a discrete, normalled ground path as well. During unpatched operation, you have to normal the sleeve of the source to the sleeve of the destination jack to maintain a complete power circuit, since the sleeve returns the DC voltage to the power supply. When patched, all three normal contacts must be broken to avoid directing that channel’s phantom power to multiple sources.

2x24x2RU (WQP-01SN-E-C-24-N-2)
Sleeve-Normalling Punchdown Unit self-contained to QCP Punchdown.

SHORTI (3-Pin) highlights

• 2x26x2RU to 3-Pin EDAC connectors with Tip, Ring, Sleeve and Tip normal, Ring normal, and Sleeve normal brought out.

• Supplied with mating connectors and pins and prewired sleeve- normalling jumpers.

• Other options include wiring the normals internally at the jacks and bringing Tip, Ring, and Sleeve only out to either punchdown or multi-pin connectors. Call for details.

Sleeve-normalling Punchdown highlights

• Available in either 2x24 or 2x26 wired to ADC QCP punchdown backplates with 4-foot harness.

• Other options include wiring the normals internally at the jacks and bringing Tip, Ring, and Sleeve only out to either punchdown or multi-pin connectors. Call for details.